Macromolecular Materials and Engineering最新文献

筛选
英文 中文
Progress in Biodegradable Nonwoven Materials for Personal Protective Applications 个人防护用可生物降解非织造材料研究进展
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70295
Tarikul Islam,  Sayam, Pooja Maurya, Gajanan Bhat
{"title":"Progress in Biodegradable Nonwoven Materials for Personal Protective Applications","authors":"Tarikul Islam,&nbsp; Sayam,&nbsp;Pooja Maurya,&nbsp;Gajanan Bhat","doi":"10.1002/mame.70295","DOIUrl":"https://doi.org/10.1002/mame.70295","url":null,"abstract":"<p>Personal protective equipment generates large waste streams, underscoring the need for materials that deliver protection without persistent environmental costs. This study reviews biodegradable nonwoven options and relates material choice and disposal routes to barrier performance, comfort, and footprint. To frame the problem, market signals are summarized to show where high-volume items drive impacts. Building on that basis, comparative results are synthesized to indicate when biodegradable webs match the filtration and breathability of petroleum-based analogs and where charge stability, humidity tolerance, and sterilization remain limited. To connect performance with fate, the mechanisms of biodegradation are outlined, enabling test selection and data interpretation to be guided by temperature, moisture, oxygen, and microbial activity. Consistent with that goal, standardized methods for controlled composting and related matrices are reviewed to support credible claims and residue safety. Manufacturing considerations are then discussed because fiber diameter control, charge retention, and process stability govern reproducibility at scale. Application evidence is integrated to link instrument data with wearer comfort and reliability in use. Life-cycle assessment shows that benefits occur only when products reach suitable collection and treatment systems. Taken together, the review identifies clear priorities, including moisture-tolerant filtration media, non-leaching antimicrobial approaches, transparent labeling tied to disposal guidance, and procurement that rewards verified, lower-footprint products.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Large-Scale Screening of Covalent Organic Framework/Polymer Mixed-Matrix Membranes for Advanced Gas Separations 用于高级气体分离的共价有机骨架/聚合物混合基质膜的大规模筛选
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70303
Feride Neva Yungul, Gokhan Onder Aksu, Seda Keskin
{"title":"Large-Scale Screening of Covalent Organic Framework/Polymer Mixed-Matrix Membranes for Advanced Gas Separations","authors":"Feride Neva Yungul,&nbsp;Gokhan Onder Aksu,&nbsp;Seda Keskin","doi":"10.1002/mame.70303","DOIUrl":"https://doi.org/10.1002/mame.70303","url":null,"abstract":"<p>Mixed matrix membranes (MMMs) that incorporate covalent organic frameworks (COFs) as fillers in polymers offer a promising route to overcome the permeability-selectivity trade-off of polymeric membranes. However, the enormous chemical diversity of COFs has limited the large-scale evaluation of COF/polymer MMMs. In this work, we performed a large-scale computational screening using molecular simulations to compute CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub>, and O<sub>2</sub> permeabilities of COFs to evaluate 971 642 COF/polymer MMMs for CO<sub>2</sub>/CH<sub>4</sub> and O<sub>2</sub>/N<sub>2</sub> separations, and 694 030 COF/polymer MMMs for CO<sub>2</sub>/N<sub>2</sub> and H<sub>2</sub>/CO<sub>2</sub> separations. Incorporation of COFs enhanced polymers’ gas permeability, with increases of up to 75%, 74%, and 74% for CO<sub>2</sub>, H<sub>2</sub>, and O<sub>2</sub>, and MMMs achieved maximum CO<sub>2</sub>, H<sub>2</sub>, and O<sub>2</sub> permeabilities of 9.1 × 10<sup>4</sup>, 3.3 × 10<sup>4</sup>, and 1.8 × 10<sup>4</sup> Barrer, respectively. Comparison with metal-organic framework (MOF)/polymer MMMs constructed from the same polymer set revealed that COF-based MMMs improve gas permeabilities, whereas MOF-based MMMs achieve higher selectivities, particularly for H<sub>2</sub>/CO<sub>2</sub> separation. Analysis of the top-performing COF fillers using the molecular fingerprint method revealed that nitrogen-rich heterocyclic motifs, pore size distribution, and pore uniformity play key roles in determining gas permeation behavior. Overall, our work established structure-performance relationships for COF/polymer MMMs and provides molecular-level design guidelines for developing next-generation polymeric gas separation membranes.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70303","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiscale Characterization by Equibiaxial Tensile Testing and Time-Domain 1H Solid State NMR for PTMC-Based Networks for Tissue Growth 基于ptmc的组织生长网络的等双轴拉伸测试和时域1H固体核磁共振多尺度表征
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70263
Florian Feyne, Bas van Bochove, Steve Spoljaric, Mustapha Zidi, Ali Aghaei, Agustín Rios de Anda
{"title":"Multiscale Characterization by Equibiaxial Tensile Testing and Time-Domain 1H Solid State NMR for PTMC-Based Networks for Tissue Growth","authors":"Florian Feyne,&nbsp;Bas van Bochove,&nbsp;Steve Spoljaric,&nbsp;Mustapha Zidi,&nbsp;Ali Aghaei,&nbsp;Agustín Rios de Anda","doi":"10.1002/mame.70263","DOIUrl":"https://doi.org/10.1002/mame.70263","url":null,"abstract":"<p>Poly(trimethylene carbonate) (PTMC) is a biodegradable and biocompatible elastomer suitable for tissue growth in biomedical applications, due to its tunable mechanical properties and safe degradation behavior. While PTMC-based photo-cross-linked networks have demonstrated promising performance for such applications, their mechanical behavior under multiaxial loading remains seldom investigated. In this study, PTMC networks with macromer molecular weights ranging from 3 to 25 kg/mol were investigated to elucidate the relationship between network structure and biaxial tensile properties. A multiscale experimental approach combining biaxial tensile testing, Dynamic Mechanical Analysis (DMA), and Time-domain <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow></mrow>\u0000 <mn>1</mn>\u0000 </msup>\u0000 <mi>H</mi>\u0000 </mrow>\u0000 <annotation>${^1}H$</annotation>\u0000 </semantics></math> Solid State NMR measurements were employed. Magic Sandwich Echo experiments were used to probe molecular mobility, while Double-Quantum <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow></mrow>\u0000 <mn>1</mn>\u0000 </msup>\u0000 <mi>H</mi>\u0000 </mrow>\u0000 <annotation>${^1}H$</annotation>\u0000 </semantics></math> NMR measurements provided insight into the networks' cross-link densities. Obtained results reveal a direct correlation between network architecture, cross-link density and distribution, and macroscopic thermomechanical behavior. These findings highlight the importance of a deepened multiscale characterization for understanding and tailoring the mechanical performance of PTMC networks for biomedical applications.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70263","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance and UV-Induced Microplastics Formation in a PBS/PBAT Blend With and Without Joncryl Reactive Compatibilization 有和没有Joncryl反应增容的PBS/PBAT共混物的性能和紫外线诱导的微塑料形成
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70307
Vincenzo Titone, Vito Gigante, Francesco Paolo La Mantia
{"title":"Performance and UV-Induced Microplastics Formation in a PBS/PBAT Blend With and Without Joncryl Reactive Compatibilization","authors":"Vincenzo Titone,&nbsp;Vito Gigante,&nbsp;Francesco Paolo La Mantia","doi":"10.1002/mame.70307","DOIUrl":"https://doi.org/10.1002/mame.70307","url":null,"abstract":"<p>To the best of our knowledge, only a few studies have investigated the generation of micro- and nanoplastics from biodegradable polymers and polymer blends, likely due to their biodegradable nature and lower environmental persistence. Nevertheless, understanding their fragmentation behavior is crucial to clarify the effects of blend composition, processing conditions, and ageing on particle formation. In this study, poly(butylene succinate) (PBS) and poly(butylene adipate-co-terephthalate) (PBAT) were blended with and without the reactive compatibilizer Joncryl to evaluate the role of reactive compatibilization and the potential formation of microplastics. Spectroscopic, rheological, morphological, and mechanical characterizations were performed, together with mechanical fragmentation tests before and after ultraviolet (UV) irradiation. The results revealed significant morphological improvements in compatibilized blends, with an approximately 30% reduction in dispersed phase size. Enhanced rheological and mechanical properties were also observed, particularly in elongation at break (≈28% vs. 263%). From a sustainability perspective, no intentional microplastic release was detected. However, after 120 h of UV exposure, unintentional microplastic release occurred, with fragments smaller than 5 mm accounting for ≈16 wt% in compatibilized samples versus ≈22 wt% in uncompatibilized blends. Overall, Joncryl improved material performance while potentially reducing microplastic release.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70307","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tumor-Responsive PLGA-SS-HA Nanoparticles for Zinc Complex Delivery Suppress Prostate Cancer via TR3/FTH1 Pathway 肿瘤反应性PLGA-SS-HA纳米颗粒锌复合物通过TR3/FTH1途径抑制前列腺癌
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70314
Ding Ma, Sheng Ge, Ruimin Ren, Yongqiang Fu
{"title":"Tumor-Responsive PLGA-SS-HA Nanoparticles for Zinc Complex Delivery Suppress Prostate Cancer via TR3/FTH1 Pathway","authors":"Ding Ma,&nbsp;Sheng Ge,&nbsp;Ruimin Ren,&nbsp;Yongqiang Fu","doi":"10.1002/mame.70314","DOIUrl":"https://doi.org/10.1002/mame.70314","url":null,"abstract":"<p>Therapeutic resistance and redox imbalance remain major challenges in advanced prostate cancer, necessitating targeted delivery with pathway-specific strategies. In the present work, we designed a tumor-specific PLGA-SS-HA nanoparticle proposed for the controlled delivery of zinc complexes to modulate the TR3/FTH1 pathway. The amphiphilic conjugate forms nanoparticles of approximately 80 nm in diameter. The disulfide bond allows for the triggered delivery of Zn<sup>2</sup><sup>+</sup> (80%–90% within 24 h) in the presence of glutathione under reductive conditions, while preventing premature release under physiological conditions. PLGA-SS-HA@Zn demonstrated enhanced anticancer efficacy compared with free ZnPPIX, reducing IC<sub>50</sub> values to 30–38 µg/mL in PC-3 cells and 35–42 µg/mL in DU-145 cells, whereas normal RWPE-1 cells exhibited IC<sub>50</sub> values &gt;70 µg/mL, indicating selective cytotoxicity. At a mechanistic level, there is clear evidence of a significant accumulation of ROS, loss of mitochondrial membrane potential, and apoptosis in more than 60% of the cells. At a molecular level, treatment induced ∼3-fold upregulation of TR3 and Bax, suppression of FTH1 and Bcl-2, and robust activation of cleaved caspase-3 and PARP, confirming engagement of the intrinsic apoptotic pathway. Together, this redox-sensitive nanoplatform enhances zinc-mediated oxidative stress and selectively suppresses prostate cancer, providing a mechanistically defined therapeutic strategy.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70314","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
UV-Assisted Direct Ink Writing of Fully Bio-Derived Photopolymer Composites With High Cellulose Loadings 具有高纤维素负载的全生物衍生光聚合物复合材料的uv辅助直接墨水书写
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70285
Maksims Jurinovs, Anda Gromova, Davis Veidmanis, Madara Veseta, Sabīne Greivule, Krisjanis Smits, Tobias Robert, Sergejs Gaidukovs
{"title":"UV-Assisted Direct Ink Writing of Fully Bio-Derived Photopolymer Composites With High Cellulose Loadings","authors":"Maksims Jurinovs,&nbsp;Anda Gromova,&nbsp;Davis Veidmanis,&nbsp;Madara Veseta,&nbsp;Sabīne Greivule,&nbsp;Krisjanis Smits,&nbsp;Tobias Robert,&nbsp;Sergejs Gaidukovs","doi":"10.1002/mame.70285","DOIUrl":"https://doi.org/10.1002/mame.70285","url":null,"abstract":"<p>This work presents a plant oil-derived acrylate resin system with high loadings of microcrystalline cellulose (MCC), enabling high-viscosity, sustainable additive manufacturing via UV-assisted extrusion direct ink writing (DIW) 3D printing. In contrast to prior bio-based vat photopolymerization AM systems, which typically rely on low-viscosity oligomers, the present approach combines a bio-based carbon fraction with mechanical reinforcement and extrusion compatibility. The proposed resin exhibits shear-thinning behavior, making it suitable for syringe-based extrusion, and cures rapidly under UV irradiation, ensuring dimensional fidelity and layer integrity. The mechanical response of the printed composites is tunable through formulation and post-curing. In the UV-cured state, the materials remain tough and flexible, with elastic moduli below 60 MPa and elongation at break exceeding 50%. Thermal post-curing increases the elastic modulus to 594 MPa and raises the tensile strength to 15 MPa at the optimized cellulose content. Thermogravimetric analysis shows that varying cellulose content does not significantly alter the thermal stability, while thermal post-curing shifts the decomposition onset by 3°C–5°C to higher temperatures. Collectively, the developed ink formulations and processing strategy establish a new path for green composite AM, advancing the state of the art and positioning bio-based photopolymers as viable candidates for industrial AM applications.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70285","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Applications of Textile Waste as Reinforcement in Fiber-Reinforced Polymer Composites for Circularity—A Review 纺织废料在循环纤维增强聚合物复合材料中的应用综述
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70306
Md Ikramul Islam, Hom N. Dhakal, Andrew Pickford, Seeram Ramakrishna, Abu Saifullah
{"title":"Applications of Textile Waste as Reinforcement in Fiber-Reinforced Polymer Composites for Circularity—A Review","authors":"Md Ikramul Islam,&nbsp;Hom N. Dhakal,&nbsp;Andrew Pickford,&nbsp;Seeram Ramakrishna,&nbsp;Abu Saifullah","doi":"10.1002/mame.70306","DOIUrl":"https://doi.org/10.1002/mame.70306","url":null,"abstract":"<p>Recent transformations in fast-fashion trends and a huge increase in annual clothing consumption (13 kg/person) have resulted in the generation of vast quantities (∼92 million tons/year) of textile waste. The improper management, that is, burning and landfilling, of textile waste releases harmful emissions and causes water and soil contamination. The utilization of textile waste as reinforcement in polymer composites offers a sustainable yet challenging approach for achieving textile materials circularity. While research on textile waste composites is progressing, a critical review analysis examining their current developments, challenges, and future directions is still lacking. This review article discusses different types of textile waste, environmental impacts, and their valorization in fiber-reinforced polymer composites. A critical analysis is presented on waste-based composite development- process optimization, ultimate structural details, mechanical, thermal, water absorption, and biodegradability properties, hybridization techniques, chemical treatments, and improvements in their properties. Furthermore, this review examines their potential applications and discusses the current challenges in advancing their structural and functional performances for emerging applications. Finally, materials circularity, life cycle assessment, integration of artificial intelligence technology, and scalability challenges are addressed to accelerate the transition of lab-scale composites’ development into sustainable and fully circular industrial-scale products.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70306","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrogels: From Simple Covalently Cross-Linked Systems toward Hydrophobically Associating Adaptive Semicrystalline Materials 水凝胶:从简单的共价交联体系到疏水缔合自适应半晶材料
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70304
Oguz Okay
{"title":"Hydrogels: From Simple Covalently Cross-Linked Systems toward Hydrophobically Associating Adaptive Semicrystalline Materials","authors":"Oguz Okay","doi":"10.1002/mame.70304","DOIUrl":"https://doi.org/10.1002/mame.70304","url":null,"abstract":"<p>Hydrogels have evolved from simple water-swollen polymer networks into sophisticated adaptive materials governed by hierarchical molecular interactions and structural organization. As discussed in this review, their macroscopic behavior cannot be explained by ideal network theories alone, but instead arises from the interplay of cross-linking efficiency, network heterogeneity, finite chain extensibility, and dynamic intermolecular interactions across multiple length scales. The intrinsic non-ideality of hydrogel networks, including structural defects and ineffective cross-links, limits the applicability of classical elasticity models. These limitations are particularly evident in highly swollen and ionic hydrogels, where non-Gaussian elasticity and ion-induced osmotic effects dominate the mechanical response and produce strong environmental sensitivity. Consequently, hydrogel research has shifted from static covalently cross-linked systems toward hydrophobically associating adaptive semicrystalline materials. Hydrophobically modified hydrogels exemplify this transition, as reversible hydrophobic associations act as physical cross-links that enhance toughness, dissipate energy, and enable self-healing. Micellar polymerization further allows the formation of transient hydrophobic domains, yielding materials with tunable mechanics and adaptive behavior. The incorporation of semicrystalline domains broadens the accessible property range by combining stiffness, toughness, extensibility, and shape-memory functionality, reflecting a broader move toward bioinspired hydrogel design.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70304","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Chain Extender on The Thermal, Rheological, and Supercritical Foaming Behavior of Polyamide-12 扩链剂对聚酰胺-12热、流变及超临界发泡性能的影响
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70308
Karim Ali Shah, Malvina Boutigny, Holger Ruckdäschel
{"title":"Influence of Chain Extender on The Thermal, Rheological, and Supercritical Foaming Behavior of Polyamide-12","authors":"Karim Ali Shah,&nbsp;Malvina Boutigny,&nbsp;Holger Ruckdäschel","doi":"10.1002/mame.70308","DOIUrl":"https://doi.org/10.1002/mame.70308","url":null,"abstract":"<p>In this study, the influence of chain extender (CE) concentration on the batch foaming behavior of Polyamide 12 (PA 12) under supercritical CO<sub>2</sub> batch foaming is investigated. Foam density and expansion behavior were analyzed as a function of processing temperature and pressure. Significant improvements in foam structure and density were observed with increasing CE content. This led to fine and uniform morphologies, accompanied by a substantial increase in cell density. Optimal performance was achieved at 0.5 wt.% CE, where the smallest cell size and the highest nucleation density were obtained, along with low foam densities in the range of approximately 0.06 to 0.09 g/cm<sup>3</sup>. Rheological analysis revealed that CE incorporation significantly increased melt viscosity, elasticity, and strain-hardening behavior, enhancing melt stability during cell growth. DSC analysis indicated a reduction in crystallinity and the formation of heterogeneous crystalline structures, with crystallization temperatures shifting to higher values, and a broader melting behavior was observed. These findings provide critical insight into the role of modification and processing conditions play in the effect of foam structure and performance, offering a naive strategy for of PA 12 batch foaming.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70308","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of SBS Copolymer Molecular Structure on the Long-Term Aging and Resilience of Asphalt Binders: A Multiscale Morphological Study SBS共聚物分子结构对沥青粘结剂长期老化和回弹性的影响:多尺度形态学研究
IF 5.2 3区 材料科学
Macromolecular Materials and Engineering Pub Date : 2026-08-05 DOI: 10.1002/mame.70301
Sk Sohel Islam, Ayana Ghosh, Bhupendra Singh, Gondaimei Rongmei Naga Ransinchung, Sham S. Ravindranath, Praveenkumar Thaloor Ramesh, Zelalem Mebrate
{"title":"Effect of SBS Copolymer Molecular Structure on the Long-Term Aging and Resilience of Asphalt Binders: A Multiscale Morphological Study","authors":"Sk Sohel Islam,&nbsp;Ayana Ghosh,&nbsp;Bhupendra Singh,&nbsp;Gondaimei Rongmei Naga Ransinchung,&nbsp;Sham S. Ravindranath,&nbsp;Praveenkumar Thaloor Ramesh,&nbsp;Zelalem Mebrate","doi":"10.1002/mame.70301","DOIUrl":"https://doi.org/10.1002/mame.70301","url":null,"abstract":"<p>The long-term performance and durability of polymer-modified bitumen (PMB) are strongly influenced by the molecular architecture and vinyl content of styrene–butadiene–styrene (SBS) copolymers. This study investigates the effect of different SBS structures—linear (L-SBS), high-vinyl (HV-SBS), branched (B-SBS), and di-block (DB-SB)—on the morphological, micromechanical, and chemical characteristics of PMBs after Pressure Aging Vessel (PAV) ageing. Atomic Force Microscopy (AFM), Fluorescent Microscopy (FM), Scanning Electron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FTIR) were employed to evaluate ageing-induced degradation. AFM results revealed a pronounced increase in bee-phase proportion for L-SBS and B-SBS binders (30% and 19%, respectively), whereas HV-SBS and DB-SB exhibited comparatively smaller changes (8% and 7%). Similarly, Derjaguin–Muller–Toporov (DMT) modulus values increased markedly for L-SBS and B-SBS, indicating significant oxidation-induced hardening. FM and SEM analyses confirmed severe fragmentation of the polymer network in these binders, while HV-SBS and DB-SB maintained greater structural integrity after ageing. FTIR analysis further revealed more pronounced chemical degradation in L-SBS and B-SBS, whereas HV-SBS and DB-SB exhibited enhanced chemical stability. Overall, SBS copolymers with lower vinyl content (≤15%) were more susceptible to ageing-induced degradation, while high-vinyl SBS demonstrated superior resistance to thermal-oxidative ageing, highlighting the critical role of molecular architecture in improving the long-term durability of PMBs.</p>","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 8","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.70301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148696111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信
小红书