Macromolecular Materials and Engineering最新文献_第7页

Masthead: Macromol. Mater. Eng. 12/2024 报头:絮凝。板牙。Eng。12/2024

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-16 DOI: 10.1002/mame.202470024

引用次数: 0

Speckle Pattern Analysis of PVK:rGO Composite Based Memristor Device PVK:rGO复合材料记忆电阻器件的散斑模式分析

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-16 DOI: 10.1002/mame.202470023

Ramin Jamali, Madeh Sajjadi, Babak Taherkhani, Davood Abbaszadeh, Ali-Reza Moradi

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Hierarchical Glass Fiber Superstructures with Supramolecular Nanofibers for the Nucleation of Isotactic Polypropylene 等规聚丙烯成核用超分子纳米纤维分层玻璃纤维超结构

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-14 DOI: 10.1002/mame.202400389

Dennis Schröder, Jannik Thanner, Klaus Kreger, Hans-Werner Schmidt

{"title":"Hierarchical Glass Fiber Superstructures with Supramolecular Nanofibers for the Nucleation of Isotactic Polypropylene","authors":"Dennis Schröder, Jannik Thanner, Klaus Kreger, Hans-Werner Schmidt","doi":"10.1002/mame.202400389","DOIUrl":"https://doi.org/10.1002/mame.202400389","url":null,"abstract":"Supramolecular additives are an established class of nucleating agents to modify and control the solid-state morphology of semi-crystalline polymers, in particular isotactic polypropylene (iPP). A widely used reinforcement material for iPP is glass fibers (GFs), which significantly improve the mechanical properties. Here, these two types of materials are combined by creating defined hierarchical superstructures composed of glass microfiber nonwovens and supramolecular nanofibers based on selected 1,3,5-benzetrisamides (BTA). The supramolecular nanofibers are prepared by physical vapor deposition (PVD), a straightforward solvent-free process. By systematically varying PVD process parameters, it is shown that supramolecular BTA nanofibers can be reproducibly prepared on flat substrates. The morphology of the supramolecular nanofibers can be controlled by substrate temperature, evaporation time, and evaporation rate. The use of GF nonwovens enables the fabrication of hierarchical superstructures with a bottlebrush morphology comprising supramolecular nanofibers of defined length. These hierarchical superstructures are capable of nucleating iPP and thus promote transcrystallization of the iPP from the decorated GFs surface, which ultimately improves the adhesion between the GFs and the iPP. Laminating decorated GF nonwovens between two iPP films clearly increases the mechanical properties of the composites in contrast to composites without nucleating agents.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400389","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074243","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

Mechanical and Morphological Perspectives on PLA-Based Thermoplastic Vulcanizates (TPVs): A Brief Review pla基热塑性硫化胶（TPVs）的力学和形态学研究综述

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-13 DOI: 10.1002/mame.202400209

Zahra Shahroodi, Vahid Momeni, Ali Moshkriz, Nariman Rajabifar, Reza Darvishi

{"title":"Mechanical and Morphological Perspectives on PLA-Based Thermoplastic Vulcanizates (TPVs): A Brief Review","authors":"Zahra Shahroodi, Vahid Momeni, Ali Moshkriz, Nariman Rajabifar, Reza Darvishi","doi":"10.1002/mame.202400209","DOIUrl":"https://doi.org/10.1002/mame.202400209","url":null,"abstract":"Poly(lactic acid) (PLA) brings intriguing prospects to the realm of biodegradable polymers through environmental sustainability, processing, and affordability. However, the widespread use of PLA remains full of challenges mostly because of its brittleness and poor mechanical properties. This review highlighted recent studies on improving PLA brittleness by adding different elastomeric systems and using different crosslinking systems in order to improve the mechanical properties, enhance the interfacial interactions, and stabilize the micromorphology of PLA systems as an effective, promising strategy to mitigate intrinsic PLA problems. Looking at the different microstructures required to achieve better performance, an insightful discussion on the developed morphology between PLA and high-elastic materials is featured along with reviewing primary mechanical concepts. It concludes with an outlook for static and dynamic vulcanization systems with a perspective of biodegradable PLA and draws attention to the new possibilities that crosslinked PLA can offer.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400209","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404301","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

Synthesis of Block Copolymers Utilizing Alkoxycarbonylation or Aminocarbonylation of Growing Chain End in Pd-Catalyzed Living Polymerization of Olefins 利用钯催化烯烃活聚合中生长链端的烷氧基羰基化或氨基羰基化合成嵌段共聚物

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-11 DOI: 10.1002/mame.202400358

Daisuke Takeuchi, Kohsuke Ohta, Yuta Kimura

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Structural and Optical Anomalies in Thin Films Grown in a Magnetic Field by Electron-Assisted Vacuum Deposition of PTFE 电子辅助真空沉积PTFE在磁场中生长薄膜的结构和光学异常

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-09 DOI: 10.1002/mame.202400332

Viachaslau Ksianzou, Claus Villringer, Kostyantyn Grytsenko, Demyd Pekur, Petro Lytvyn, Mykola Sopinskyy, Iryna Lebedyeva, Agata Niemczyk, Jolanta Baranowska

引用次数: 0

Flame Retardancy via in-Mould Coating and Durability of Flame Retardants After Mechanical Recycling in all-polyamide Composites Prepared by In Situ Polymerisation 原位聚合制备的全聚酰胺复合材料的模内涂层阻燃性和机械回收后阻燃剂的耐久性

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-08 DOI: 10.1002/mame.202400325

Zsófia Kovács, Andrea Toldy

{"title":"Flame Retardancy via in-Mould Coating and Durability of Flame Retardants After Mechanical Recycling in all-polyamide Composites Prepared by In Situ Polymerisation","authors":"Zsófia Kovács, Andrea Toldy","doi":"10.1002/mame.202400325","DOIUrl":"https://doi.org/10.1002/mame.202400325","url":null,"abstract":"Sustainable development requires that the structural materials can be easily recycled. The advantage of all-polyamide composites (APCs) is that the matrix and the reinforcing material come from the same material family and can be easily mechanically recycled. In the research, polyamide 6.6 (PA6.6) reinforced polyamide 6 (PA6) composites by anionic ring-opening polymerisation are prepared and created a flame retardant coating on their surface by in-mould coating. The thermal stability of the created flame retarded APCs is investigated by thermogravimetric analysis (TGA), and the flammability is tested by UL-94 test, limiting oxygen index (LOI) and mass loss type cone calorimetry (MLC). The coatings reduced the peak heat release rate (pHRR) by up to 49% and increased the residual mass after combustion. The flame retarded APCs are mechanically recycled with the addition of 50 mass% primary material, and their thermal properties and flammability are investigated. The most effective formulations fully preserved their ability to reduce pHRR, demonstrating the durability of flame retardant properties through multiple life cycles. In the case of the sample containing 3% phosphorus from hexaphenoxycyclotriphosphazene (HPCTP) and 4% expandable graphite (EG), the pHRR after recycling is reduced by 35% compared to primary APC without flame retardants.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602388","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

PLA Double-Spirals Offering Enhanced Spatial Extensibility 提供更强空间扩展性的 PLA 双螺旋结构

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-06 DOI: 10.1002/mame.202400208

Mohsen Jafarpour, Stanislav N. Gorb

{"title":"PLA Double-Spirals Offering Enhanced Spatial Extensibility","authors":"Mohsen Jafarpour, Stanislav N. Gorb","doi":"10.1002/mame.202400208","DOIUrl":"https://doi.org/10.1002/mame.202400208","url":null,"abstract":"Inspired by natural spiral curves, this study aims to present a strategy to find a compromise between extensibility and load-bearing capacity in structures made from polylactic acid (PLA) as a brittle material. Herein, four geometrically distinct double-spiral modules are fabricated using a three-dimensional (3D) printer and subjected to tension, in-plane sliding, and out-of-plane sliding to assess both their in-plane and out-of-plane mechanical performance. Subsequently, a modular spiral-based metastructure is developed and tested under tension in two different directions. The results show that the maximum extension of the modules under different loading scenarios varies from 9 to 86 mm, while their load-bearing capacity ranges between 18 and 78 N. These significant variations highlight the considerable influence of both geometry and loading conditions on the mechanical behavior of the double-spiral modules. Moreover, the 250% horizontal and 130% vertical extensibility of the metastructure emphasize the importance of the spatial orientation of the modules in determining the efficiency of spiral-based metastructures. This study suggests that double-spirals with adjustable mechanical properties, if designed rationally, can offer a promising strategy to address the limited deformability of materials like PLA, and when arranged in specific spatial configurations, they can contribute to the development of energy-dissipative metastructures with enhanced extensibility.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400208","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143831053","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

Recycled PET Packaging Materials of Improved Toughness— Importance of Devitrification of the Rigid Amorphous Fraction 提高韧性的再生PET包装材料-刚性非晶部分脱硝的重要性

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-04 DOI: 10.1002/mame.202400219

Ferenc Ronkay, Dániel Gere, Emese Slezák, Edina Szabó, György Marosi, Katalin Bocz

{"title":"Recycled PET Packaging Materials of Improved Toughness— Importance of Devitrification of the Rigid Amorphous Fraction","authors":"Ferenc Ronkay, Dániel Gere, Emese Slezák, Edina Szabó, György Marosi, Katalin Bocz","doi":"10.1002/mame.202400219","DOIUrl":"https://doi.org/10.1002/mame.202400219","url":null,"abstract":"Degradation, a common problem faced during the processing of recycled poly(ethylene terephthalate) (PET), leads to significant embrittlement of the products, as a result of which the material loses its applicability. Increased crystallization rate of the short chains of recycled PET and obstructed mobility of the amorphous phase are the main causes of enhanced brittleness. In this research, a straightforward method is proposed for improving the toughness of recycled PET products, namely the devitrification of the rigid amorphous phase by thermal annealing, which results in enhanced molecular mobility in the amorphous fraction, thereby promoting ductile deformation. The effects of thermal annealing conditions are comprehensively evaluated on the microstructure and macroscopic properties, i.e., impact resistance, of recycled PET films. The perforation energy value of the recycled PET film is found to increase to its threefold, reaching a value higher than 18 J mm−1, as a result of 10 s thermal treatment at 120 °C. Differential scanning calorimetry, dynamic mechanical analyses, and thermally stimulated depolarization current measurements provide evidence for the devitrification of the rigid amorphous fraction under these conditions, which is the key to efficient enhancement in toughness.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400219","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404639","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

Exploiting Response Surface Methodology to Engineer the Mechanical Properties of Alginate-based Hydrogels 利用响应面法设计海藻酸盐基水凝胶的力学性能

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-12-02 DOI: 10.1002/mame.202400296

Alessio Bucciarelli, Chen Zhao, Xue Bai, Rebekah Kay, Ayşe Latif, Kaye J. Williams, Annalisa Tirella

{"title":"Exploiting Response Surface Methodology to Engineer the Mechanical Properties of Alginate-based Hydrogels","authors":"Alessio Bucciarelli, Chen Zhao, Xue Bai, Rebekah Kay, Ayşe Latif, Kaye J. Williams, Annalisa Tirella","doi":"10.1002/mame.202400296","DOIUrl":"https://doi.org/10.1002/mame.202400296","url":null,"abstract":"Engineering human tissue microenvironments that recapitulate the composition and biomechanics of extracellular matrix (ECM) in vitro is challenging. New mechanically tunable alginate-based hydrogels are presented, enabling to precise model multiple ECM features in the context of breast cancer. Combining alginate, oxidized alginate (OA), and gelatin with different crosslinking strategies a library of mechanically controlled hydrogels supporting human cell growth (MDA-MB-231) is obtained. The compressive moduli and stability of alginate-based hydrogels are characterized and modeled using a response surface methodology (RSM); this enables to selection of precision-hydrogels decoupling their biochemical composition with mechanical properties (1–30 kPa). Specific alginate-based hydrogels are selected as enhanced technologies to model breast-specific microenvironments in vitro to study the impact of biomechanical and biochemical properties on cell behavior. Doxorubicin is selected as a model drug and as first-line treatment for breast cancer to investigate the correlation between drug efficacy and breast tumor ECM stiffness. Results demonstrate that doxorubicin is less effective (EC50 0.495 µm vs EC50 0.189 µm) in cells cultured in softer hydrogels (6.9 kPa) than in stiffer (21.0 kPa). In the context of breast cancer, engineered hydrogels prove valuable technologies to model tissue-specific ECM in vitro for biological studies, advancing understanding of therapeutic response and resistance.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400296","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404270","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