Macromolecular Materials and Engineering最新文献_第3页

Filler Size Hybridization and Dielectrophoretic Structuring of Soft Polymer Based Thermally Conductive Composites 软聚合物基导热复合材料填料尺寸、杂化及介电泳结构研究

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-09 DOI: 10.1002/mame.202500271

Omar Zahhaf, Giulia D'Ambrogio, François Grasland, Guilhem Rival, Minh Quyen Le, Pierre-Jean Cottinet, Jean-Fabien Capsal

{"title":"Filler Size Hybridization and Dielectrophoretic Structuring of Soft Polymer Based Thermally Conductive Composites","authors":"Omar Zahhaf, Giulia D'Ambrogio, François Grasland, Guilhem Rival, Minh Quyen Le, Pierre-Jean Cottinet, Jean-Fabien Capsal","doi":"10.1002/mame.202500271","DOIUrl":"https://doi.org/10.1002/mame.202500271","url":null,"abstract":"This study offers a detailed exploration of the dielectrophoretic structuring of filler size hybrid thermally conductive composites, emphasizing the impact of filler size hybridization on the thermal and mechanical properties of PDMS-Al2O3 composites. By comparing the performance of monodisperse and hybrid composites, we highlight the advantages of size hybridization in optimizing composite properties. The results indicate significant improvements in thermal conductivity and mechanical stiffness due to enhanced filler packing density and more efficient structuring. Our investigation into various compositions and size ratios reveals optimal thermal properties at specific hybridization levels, suggesting key parameters for superior composite performance. These results demonstrate the advantage of combining size hybridization with dielectrophoretic structuring to design advanced composites for thermal management, while emphasizing the need for future studies to tackle environmental concerns and investigate alternative polymer matrices.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500271","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147614892","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

Bio-Based Epoxy Resins from Estragole: Achieving High Glass Transition Temperatures Comparable to DGEBA and Simultaneously Low Viscosities 从Estragole提取的生物基环氧树脂：实现与DGEBA相当的高玻璃化转变温度，同时具有低粘度

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-28 DOI: 10.1002/mame.202500418

Florian Bauer, Elisabeth Schamel, Herbert Schlachter, Gerd Wehnert, Dominik Söthje

{"title":"Bio-Based Epoxy Resins from Estragole: Achieving High Glass Transition Temperatures Comparable to DGEBA and Simultaneously Low Viscosities","authors":"Florian Bauer, Elisabeth Schamel, Herbert Schlachter, Gerd Wehnert, Dominik Söthje","doi":"10.1002/mame.202500418","DOIUrl":"10.1002/mame.202500418","url":null,"abstract":"This study covers the synthesis and characterization of two new bio-based epoxy monomers, diglycidyl-4-allylphenol (DG-4A) and triglycidyl-diallylphenol (TG-DA). Both are derived from estragole, a naturally occurring allylbenzene and a major component of the essential oils in basil. The resulting epoxy monomers, with high bio-contents of 92% (DG-4A), respectively 72% (TG-DA), were cured using two different amine hardeners: isophorone diamine (IPDA) and 4,4´-diaminodiphenyl sulfone (DDS). The curing agents were selected for their distinct properties: IPDA for its bio-based availability, and DDS for its ability to impart high thermal stability and rigidity. Dynamic mechanical analysis (DMA) showed that DG-4A/DDS had a high glass transition temperature (Tg) of 236°C, which can compete with the petrochemical-based reference system DGEBA/DDS (Tg = 238°C). For the TG-DA networks, the resulting Tgs were 235°C (IPDA) and 300°C (DDS), both were higher than those of the DGEBA reference systems, due to higher crosslinking density. The dynamic viscosities of DG-4A and TG-DA were 80 and 15 times lower than those of the reference DGEBA at room temperature. These results suggest that DG-4A and TG-DA are sustainable alternatives to DGEBA, as they offer comparable or higher glass transition temperatures while maintaining lower viscosities, making them promising candidates for applications requiring high thermal performance, such as in the aerospace and automotive sectors.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500418","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147585071","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

Stimuli-Responsive 3D-Printed Structurally Colored Materials Based on Core–Shell Particle Architectures 基于核壳粒子结构的刺激响应3d打印结构彩色材料

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-21 DOI: 10.1002/mame.202500353

Sascha Verwaayen, Lukas Siegwardt, Georg Hemkemeier, Armin W. Novak, Daniel Rauber, Marc Schneider, Markus Gallei

{"title":"Stimuli-Responsive 3D-Printed Structurally Colored Materials Based on Core–Shell Particle Architectures","authors":"Sascha Verwaayen, Lukas Siegwardt, Georg Hemkemeier, Armin W. Novak, Daniel Rauber, Marc Schneider, Markus Gallei","doi":"10.1002/mame.202500353","DOIUrl":"https://doi.org/10.1002/mame.202500353","url":null,"abstract":"In additive manufacturing via fused deposition modeling (FDM), no easily scalable process for producing intelligent, e.g., pH-responsive, structurally colored filaments is known yet. This work presents the preparation of a structurally colored and pH-responsive filament for 3D printing via fused deposition modeling (FDM). The filament consists of tailored core–shell particles exhibiting an inherent pH-responsive behavior due to the incorporation of poly(methacrylic acid) in the particle shell. The filament and 3D-printed objects exhibit distinct structural coloring, exerting a clear color change when exposed to alkaline environments. The core–shell particles used are accessible via scalable stepwise emulsion polymerization in starved-feed mode, followed by freeze-drying. Through the targeted incorporation of additives and the extrusion of core–shell particles, a filament is produced, which is then utilized for 3D FDM printing. The particle design was adjusted, and the obtained materials were investigated with respect to their thermal, optical, and mechanical properties to gain a deeper understanding of the material's behavior. To gain additional insights, the obtained core–shell particles are also melt-sheared to produce 2D pH-responsive opal films. The material presented herein is a promising platform for smart sensing, secret information encoding, and anti-counterfeiting applications in complex 3D-printed objects.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500353","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579699","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

Exploring Thermal and Mechanical Strains During Laying Down Process in Fused Filament Fabrication 探讨熔丝制造中铺放过程中的热应变和机械应变

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-12-16 DOI: 10.1002/mame.202500331

Boubakeur Mecheri, Jaianth Vijayakumar, Elodie Boller, Sofiane Guessasma

{"title":"Exploring Thermal and Mechanical Strains During Laying Down Process in Fused Filament Fabrication","authors":"Boubakeur Mecheri, Jaianth Vijayakumar, Elodie Boller, Sofiane Guessasma","doi":"10.1002/mame.202500331","DOIUrl":"https://doi.org/10.1002/mame.202500331","url":null,"abstract":"Residual stress and internal strain in 3D printing can result in cracking and delamination. Here, we investigate the strain incurred during the deposition process in fused filament fabrication with a focus on polylactic acid (PLA) polymer. Specific geometries are employed to analyse thermal cycling and strain development, utilizing high-resolution infrared camera and strain gauges. We investigate various printing parameters such as printing temperature, base temperature, and printing speed. Both thermal cycling and strain development were characterized throughout the printing procedure. Our results show that strain arises from both mechanical pressure exerted by the nozzle and thermal transfer between layers. During heating, strain reached up to 0.25 µε (microstrain), while cooling induced compressive behavior. The real strain, independent of thermal effects, peaked at 0.07 µε, with the first five layers showing the largest variations. Increasing base temperature to 80°C reduced strain fluctuations (0.009–0.010 µε). X-ray microtomography revealed 0.22% porosity, and thermal imaging measured heat penetration up to 4 mm, with cooling rates of −130°C/s slowing to −75°C/s. These findings highlight the critical role of printing parameters on residual stresses and structural integrity in 3D printed PLA.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147585084","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

Interfacial Energy and Composition Controlled Self-Stratification in Polyurethane Coatings 聚氨酯涂料中界面能和成分控制的自分层

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-18 DOI: 10.1002/mame.202500424

Gaurav Singhal, Lihong Lao, Michaeleen L. Pacholski, Harshad Shah, Junsi Gu, Bryan Caruso, Fabio Aguirre-Vargas, Piyush Singh, Kshitish A. Patankar, Simon A. Rogers, Charles M. Schroeder, Paul V. Braun

{"title":"Interfacial Energy and Composition Controlled Self-Stratification in Polyurethane Coatings","authors":"Gaurav Singhal, Lihong Lao, Michaeleen L. Pacholski, Harshad Shah, Junsi Gu, Bryan Caruso, Fabio Aguirre-Vargas, Piyush Singh, Kshitish A. Patankar, Simon A. Rogers, Charles M. Schroeder, Paul V. Braun","doi":"10.1002/mame.202500424","DOIUrl":"10.1002/mame.202500424","url":null,"abstract":"Self-stratifying polymer systems are of great interest for coatings, as such systems reduce the time, cost, and environmental impact associated with the application of multilayered coatings by providing several layers in a single coating step. We have developed an understanding of self-stratification in polyurethane systems that occurs when hydrophobic and hydrophilic polyols containing ethylene oxide, propylene oxide, and butylene oxide mers and prepolymers containing toluene diisocyanate and methylene diphenyl diisocyanate are mixed and cured. When these components are mixed in appropriate proportions, self-stratification occurs where the hydrophobic component migrates to the air interface and the hydrophilic component to the substrate interface, with a thin hydrophobic layer present at the substrate walls when the substrate is hydrophobic. Self-stratification requires less than 60 min, significantly less than the time required for the storage modulus to crossover the loss modulus (∼5 h). SIMS, XPS, and confocal Raman show that the stratification process at the air and substrate interfaces is dependent on interfacial surface energies, with the thickness and composition of the up to 10 µm thick interfacial region at the substrate controlled by the substrate surface energy. Self-stratification is observed in both the bulk and thicknesses conventionally associated with coatings (10s of µm).","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500424","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579685","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

Stimuli-Responsive 3D-Printed Structurally Colored Materials Based on Core–Shell Particle Architectures 基于核壳粒子结构的刺激响应3d打印结构彩色材料

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-21 DOI: 10.1002/mame.202500353

Sascha Verwaayen, Lukas Siegwardt, Georg Hemkemeier, Armin W. Novak, Daniel Rauber, Marc Schneider, Markus Gallei

{"title":"Stimuli-Responsive 3D-Printed Structurally Colored Materials Based on Core–Shell Particle Architectures","authors":"Sascha Verwaayen, Lukas Siegwardt, Georg Hemkemeier, Armin W. Novak, Daniel Rauber, Marc Schneider, Markus Gallei","doi":"10.1002/mame.202500353","DOIUrl":"https://doi.org/10.1002/mame.202500353","url":null,"abstract":"In additive manufacturing via fused deposition modeling (FDM), no easily scalable process for producing intelligent, e.g., pH-responsive, structurally colored filaments is known yet. This work presents the preparation of a structurally colored and pH-responsive filament for 3D printing via fused deposition modeling (FDM). The filament consists of tailored core–shell particles exhibiting an inherent pH-responsive behavior due to the incorporation of poly(methacrylic acid) in the particle shell. The filament and 3D-printed objects exhibit distinct structural coloring, exerting a clear color change when exposed to alkaline environments. The core–shell particles used are accessible via scalable stepwise emulsion polymerization in starved-feed mode, followed by freeze-drying. Through the targeted incorporation of additives and the extrusion of core–shell particles, a filament is produced, which is then utilized for 3D FDM printing. The particle design was adjusted, and the obtained materials were investigated with respect to their thermal, optical, and mechanical properties to gain a deeper understanding of the material's behavior. To gain additional insights, the obtained core–shell particles are also melt-sheared to produce 2D pH-responsive opal films. The material presented herein is a promising platform for smart sensing, secret information encoding, and anti-counterfeiting applications in complex 3D-printed objects.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500353","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579766","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

Successive Mechanical Recycling of Poly(lactic Acid) by Injection Molding: Evolution of Molecular, Thermal, and Mechanical Properties 连续机械循环的聚乳酸注射成型：分子，热，和机械性能的演变

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-21 DOI: 10.1002/mame.202500349

László Lendvai, Virág Luca Bódi, Martin Danko, Petar Sabev Varbanov, Sándor Kálmán Jakab

{"title":"Successive Mechanical Recycling of Poly(lactic Acid) by Injection Molding: Evolution of Molecular, Thermal, and Mechanical Properties","authors":"László Lendvai, Virág Luca Bódi, Martin Danko, Petar Sabev Varbanov, Sándor Kálmán Jakab","doi":"10.1002/mame.202500349","DOIUrl":"10.1002/mame.202500349","url":null,"abstract":"This study evaluated the changes in the molecular structure, as well as the thermal and mechanical properties of poly-lactic-acid (PLA), during successive closed-loop mechanical recycling through injection molding. Gel permeation chromatographic (GPC) analyses revealed a gradual decrease in molar mass (MM); after ten recycling steps, the MM of PLA was reduced to one-third of its initial value. According to differential scanning calorimetric (DSC) measurements, both the glass transition temperature and the cold crystallization temperature of PLA decreased, while the crystallization was facilitated by the successive recycling steps. This was ascribed to the improved chain mobility resulting from the reduced MM. Quasi-static mechanical properties were evaluated using tensile tests, while impact toughness was assessed through Charpy tests. The tensile strength of PLA was not significantly affected by recycling until the fifth recycling step, where it suffered a slight (∼5%) reduction. Meanwhile, Young's modulus, elongation at yield, and impact strength remained approximately the same as the freshly injected sample at that point. However, after ten recycling steps, all analyzed properties declined significantly: Young's modulus by 11%, tensile strength by 68%, elongation at yield by 63%, and impact strength by 30%.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500349","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579700","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

The Graphene Oxide Memristive DNA Sensor for Taxonomic Fingerprint 用于分类指纹的氧化石墨烯忆阻式DNA传感器

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-12-09 DOI: 10.1002/mame.202500286

Konstantin G. Nikolaev, Jia Hui Bong, Siyu Chen, Kostya S. Novoselov, Daria V. Andreeva

{"title":"The Graphene Oxide Memristive DNA Sensor for Taxonomic Fingerprint","authors":"Konstantin G. Nikolaev, Jia Hui Bong, Siyu Chen, Kostya S. Novoselov, Daria V. Andreeva","doi":"10.1002/mame.202500286","DOIUrl":"10.1002/mame.202500286","url":null,"abstract":"The selective, rapid, and sensitive detection of deoxyribonucleic acid (DNA) nucleobases is critical for applications in genetic diagnostics, forensic analysis, and molecular biology research. Conventional detection techniques often require sophisticated instrumentation and complex sample preparation, which limit their use in point-of-care settings. Advances in 2D nanomaterials, particularly graphene oxide (GO), have enabled the development of highly sensitive DNA sensors; however, challenges in achieving selectivity, simplicity, and speed remain. In this work, we present a simple and cost-effective transistor-based memristive DNA sensor that exploits the specific interactions between GO and double-stranded DNA. The platform enables direct, label-free quantification of DNA sequences across a guanine–cytosine (GC) content range of 37%–55%, with strong linear calibration (coefficient of determination, R2 = 0.9785). The measurement process is rapid, with electrical signals acquired within 2–5 min, and does not require denaturation, fluorescent labeling, or polymerase chain reaction (PCR) amplification. The slow relaxation of current decay following electrical pulse stimulation correlates strongly with GC content, yielding a robust analytical signal. These findings establish a pathway for DNA composition analysis, genetic screening, and taxonomic fingerprinting using memristive GO biosensors.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579758","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

Structural Characterization of Porous Photo-Crosslinked Hybrid Networks Based on Collagen-Poly(Trimethylene Carbonate) 胶原-聚碳酸三甲酯多孔光交联杂化网络的结构表征

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-21 DOI: 10.1002/mame.202500288

Agustin Rios de Anda, Anne-Constance Macarez, Marc Ankoné, Steve Spoljaric, Lieke H. A. van Dommelen, Elly M.M. Versteeg, Toin H. van Kuppevelt, Willeke F. Daamen, Dirk W. Grijpma, André A. Poot, Bas van Bochove

{"title":"Structural Characterization of Porous Photo-Crosslinked Hybrid Networks Based on Collagen-Poly(Trimethylene Carbonate)","authors":"Agustin Rios de Anda, Anne-Constance Macarez, Marc Ankoné, Steve Spoljaric, Lieke H. A. van Dommelen, Elly M.M. Versteeg, Toin H. van Kuppevelt, Willeke F. Daamen, Dirk W. Grijpma, André A. Poot, Bas van Bochove","doi":"10.1002/mame.202500288","DOIUrl":"https://doi.org/10.1002/mame.202500288","url":null,"abstract":"Combining natural hydrophilic polymers with synthetic hydrophobic polymers into photo-crosslinked hybrid networks has the potential to overcome the disadvantages of the individual components. Materials with good bioactivity as well as suitable mechanical properties and control over degradation behavior can also be prepared. Here, we prepared hybrid networks from methacrylated insoluble collagen I (ICol-MA) and poly(trimethylene carbonate) (PTMC-tMA) and investigated their thermomechanical behaviour and structural characteristics. Hybrid networks with ICol-MA to PTMC-tMA ratios of 35:65 and 20:80 were prepared. These networks had high porosities (>74%) and gel contents (>74%). The network density of the networks increased with increasing collagen content as shown by both dynamic mechanical analysis (DMA, an increase from 2 to 16 (mol/g)·104) and Solid State Time-Domain Double Quantum (DQ) 1H NMR experiments (an increase from 181.1 to 201.8 Hz). The tensile modulus increased with increasing collagen content from 1.8 MPa for PTMC to 14.3 MPa for the hybrid network with 35% ICol. DQ 1H NMR showed the presence of trapped PTMC entanglements and their effect on network density. The composition of these hybrid networks affects the molecular environment and hence the properties of the obtained networks.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147614873","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

Mechanophoric 3-Arm Star Functional Block Copolymer Based on Rhodamine Derivative 基于罗丹明衍生物的机械亲和性3臂星形功能嵌段共聚物

IF 4.6 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2026-03-24 Epub Date: 2025-11-18 DOI: 10.1002/mame.202500414

Swadhin Chakraborty, Soumik Chatterjee, N. D. Pradeep Singh, Albena Lederer, Martin Geisler, Qiong Li, Mahmoud Al-Hussein, Brigitte Voit, Nikhil K. Singha

{"title":"Mechanophoric 3-Arm Star Functional Block Copolymer Based on Rhodamine Derivative","authors":"Swadhin Chakraborty, Soumik Chatterjee, N. D. Pradeep Singh, Albena Lederer, Martin Geisler, Qiong Li, Mahmoud Al-Hussein, Brigitte Voit, Nikhil K. Singha","doi":"10.1002/mame.202500414","DOIUrl":"10.1002/mame.202500414","url":null,"abstract":"This study presents a mechanoresponsive star-shaped BCP synthesized using a 3-arm-rhodamine-based ATRP initiator. The star rhodamine mechanophore was employed to construct a 3-arm star poly(butyl acrylate)-b-poly(methyl methacrylate) (PBA-b-PMMA) BCP, alongside random star copolymers and a linear BCP for comparison. Structural characterization via NMR, SEC, and FT-IR confirmed the successful synthesis, while DSC, AFM, and SAXS analyses revealed distinct phase separation in the BCP structures, which results in enhanced mechanical strength and features of thermoplastic elastomers in the materials. Interestingly, the synthesized mechanoresponsive tri-arm star and bi-arm linear architectures in both block and random copolymer configurations exhibited a switch-off state in solution but transitioned to a “switch-on” state in the film form due to internal strain-induced mechanophoric activation. Once activated in the film state, the fluorescence intensity increases with increasing stretching, indicating progressive mechanophore activation under mechanical stress, however, with a complete and precise peak shift is only observed for the star BCP architecture. This allows, uniquely in the block copolymers architecture with the mechanophoric unit in the core, a precise determination of additional stress on the material after processing. The study provides new insight into the mechanochemical activation of rhodamine-based systems and highlights the role of molecular architecture and processing state in governing mechanoresponse.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"311 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202500414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579686","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