Macromolecular Chemistry and Physics最新文献_第2页

Issue Information: Macromol. Chem. Phys. 15/2025 发布信息：Macromol。化学。理论物理的15/2025

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-08-04 DOI: 10.1002/macp.70081

引用次数: 0

Effect of Various Functional Groups Between the Aromatic Rings of Dianhydrides on the Thermal, Mechanical and Dielectric Properties of Polyimide/Hollow Silica Fiber Composites Using 2,2-bis[4-(4-aminophenoxy)phenyl] Propane Diamine 二氢化物芳香环间不同官能团对2,2-双[4-（4-氨基苯氧基）苯基]丙烷二胺聚酰亚胺/中空二氧化硅纤维复合材料热、力学和介电性能的影响

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-31 DOI: 10.1002/macp.202500144

Che-Wei Liu, Yu-Hsuan Liu, Erh-Chiang Chen, Tzong-Ming Wu

{"title":"Effect of Various Functional Groups Between the Aromatic Rings of Dianhydrides on the Thermal, Mechanical and Dielectric Properties of Polyimide/Hollow Silica Fiber Composites Using 2,2-bis[4-(4-aminophenoxy)phenyl] Propane Diamine","authors":"Che-Wei Liu, Yu-Hsuan Liu, Erh-Chiang Chen, Tzong-Ming Wu","doi":"10.1002/macp.202500144","DOIUrl":"https://doi.org/10.1002/macp.202500144","url":null,"abstract":"<div>\u0000 \u0000 <p>In this work, the effect of various functional groups between the aromatic rings of dianhydrides on the properties of polyimide (PI)/hollow silica (HS) fiber composites is investigated. For this study, four PI/HS fiber composites are synthesized using 2,2-bis[4-(4-aminophenoxy)phenyl] propane (BAPP) diamine and four different chemical structure of dianhydrides, such as 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), 4,4’-(oxydiphthalic anhydride) (OPDA), 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) and 4,4’-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) as well as HS fiber prepared using the electrospinning and high temperature calcination technique. The experimental results of four PIs indicate that the incorporation of a flexible and unbulky ether group between the aromatic rings of dianhydride monomer into the PI matrix can decrease the thermal stability, tensile strength, and T<i>g</i> with increasing chain flexibility. The storage modulus of PI/HS fiber composites can be increased about 50%–60% as compared to pure PI matrix. By adding more HS fiber and hexafluoroisopropylidene groups into PI backbone can lower their high-frequency dielectric constant due to the increasing amount of low dielectric constant air inside HS fiber and fluorine-containing groups. The dielectric constants are about 2.82 and 2.59 at 22 and 40 GHz for the 5 wt.% 6FDA-BAPP/HS fiber composites. These phenomena are possibly accredited to the steric hindrance effect caused by the presence of HS fiber and fluorine-containing groups, which can interrupt the regular chain packing of PI with increasing their free volumes and decreasing dielectric properties.</p>\u0000 </div>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 19","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluorescence Probes from Multilayer 3D Polymers: AIE Phenomenon and its Application in Detecting Barium Ions 多层三维聚合物荧光探针：AIE现象及其在钡离子检测中的应用

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-30 DOI: 10.1002/macp.202500201

Sai Zhang, Zishuo Zhang, Yue Zhang, Guigen Li, Zhengyu Zhang

引用次数: 0

“Self-Assembly of Branching and Linear Synthetic Polycationic Peptides in Phosphate Buffer and Its Impact on Antimicrobial Activity” 磷酸缓冲液中分支和线性合成多阳离子肽的自组装及其对抗菌活性的影响

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-30 DOI: 10.1002/macp.202500104

Rotimi Sheyi, Paolo Di Gianvincenzo, Siwanut Pummarin, Desire Di Silvio, Chanchai Boomla, Fernando Albericio, Beatriz G. De La Torre, Sergio E. Moya

{"title":"“Self-Assembly of Branching and Linear Synthetic Polycationic Peptides in Phosphate Buffer and Its Impact on Antimicrobial Activity”","authors":"Rotimi Sheyi, Paolo Di Gianvincenzo, Siwanut Pummarin, Desire Di Silvio, Chanchai Boomla, Fernando Albericio, Beatriz G. De La Torre, Sergio E. Moya","doi":"10.1002/macp.202500104","DOIUrl":"https://doi.org/10.1002/macp.202500104","url":null,"abstract":"<div>\u0000 \u0000 <p>Among therapeutic peptides, antimicrobial peptides (AMPs) have gained significant attention for their potential to combat antimicrobial resistance. Their efficacy often relies on the ability to adopt organized structures, such as α-helices or β-strands. However, the formation of supramolecular aggregates can hinder their antimicrobial effectiveness. This study explores the correlation between supramolecular organization in phosphate buffer (PB) and biological activity in three cationic peptides with identical amino acid compositions, nine Leu-Lys pairs, but differing architectures: linear and branched, using lysine or a triazine as the branching unit. Structural conformation and self-assembly behaviors in water and PB were analyzed using Circular Dichroism (CD), Dynamic Light Scattering, and Atomic Force Microscopy (AFM). Results show that the linear peptide, largely unstructured or randomly coiled in water at neutral pH, adopts a β-sheet conformation in PB. AFM imaging revealed that at low peptide and phosphate concentrations, the linear peptide showed small helical rods self-assembled via β-sheet interactions. This structural transition is driven by electrostatic interactions between phosphate ions and the amine group. The linear peptide, which lacks antibacterial activity, shows a strong tendency to form large β-strand aggregates. In contrast, branched peptides were less prone to aggregation and showed enhanced antibacterial activity, particularly the triazine-branched peptide.</p>\u0000 </div>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 19","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copolymerization of Cage Silsesquioxanes with Different Substituents for Inhibition of Side-Chain Crystallization 不同取代基笼型硅氧烷共聚抑制侧链结晶

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-28 DOI: 10.1002/macp.202500237

Cashew Nagashima, Yu Tomioka, Ryota Tanaka, Takahiro Iwamoto, Kensuke Naka, Hiroaki Imoto

引用次数: 0

From Fiber to Function: Evolution of Smart Textiles in Enhanced Skin Healing 从纤维到功能：智能纺织品在增强皮肤愈合中的演变

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-28 DOI: 10.1002/macp.202500216

Bahareh Azimi, Homa Maleki, Hossein Barani, Saverio Caporalini, M. Jasim Uddin, Serena Danti

引用次数: 0

Compatibilization of Immiscible PLA/LDPE Blends Using SEBS-g-MAH: A Multiscale Approach Combining Experimental and Computational Studies 用SEBS-g-MAH增容非混相PLA/LDPE共混物：一种结合实验和计算研究的多尺度方法

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-22 DOI: 10.1002/macp.202500137

Tahar Aouissi, Abdelhak Hellati, Ali Zerriouh, Dario Cavallo, Fayçal Kabache, Walid Benayache, Mohamed Tahar Benaniba, Yacine Benguerba

{"title":"Compatibilization of Immiscible PLA/LDPE Blends Using SEBS-g-MAH: A Multiscale Approach Combining Experimental and Computational Studies","authors":"Tahar Aouissi, Abdelhak Hellati, Ali Zerriouh, Dario Cavallo, Fayçal Kabache, Walid Benayache, Mohamed Tahar Benaniba, Yacine Benguerba","doi":"10.1002/macp.202500137","DOIUrl":"https://doi.org/10.1002/macp.202500137","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, blends of inherently immiscible polylactic acid and low-density polyethylene (PLA/LDPE, 80:20) were prepared with 0–10 wt.% SEBS-g-MAH (styrene-ethylene-butylene-styrene grafted with maleic anhydride) as a compatibilizer. Molecular dynamics (MD) simulations probed the blends' binding energies and interaction mechanisms, while density functional theory (DFT) calculations (Density of states and COSMO-RS) assessed the compatibilizer's effect on polymer affinity. Morphological and thermal properties were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM). MD results showed that SEBS-g-MAH significantly increased the binding interaction energy of PLA/LDPE. DOS and COSMO-RS analyses revealed enhanced compatibility and increased affinity between PLA and LDPE when SEBS-g-MAH was present. TGA indicated no significant effect of SEBS-g-MAH on blend thermal stability, contrary to prior reports of compatibilizer-induced degradation changes. XRD results demonstrated a reduction in crystallinity with increasing SEBS-g-MAH content. SEM images revealed a finer and more uniform phase morphology, as well as improved PLA/LDPE interfacial adhesion. These improvements are attributed to the amphiphilic nature of SEBS-g-MAH, which strengthens interfacial interactions. Overall, SEBS-g-MAH effectively compatibilizes PLA/LDPE blends, yielding a refined morphology, superior compatibility, and accelerated interfacial interaction compared to other compatibilizers. These findings highlight the potential of SEBS-g-MAH as a superior compatibilizer in immiscible PLA/LDPE blends.</p>\u0000 </div>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 18","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145102161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synchronous Raises of Polymerization Rate and Controllability of N-Phenoxycarbonyl 3,4-Dihydroxy-l-Phenylalanine Catalyzed by Organic Acid and Base 有机酸和碱催化n -苯氧羰基3,4-二羟基-苯丙氨酸聚合速率和可控性的同步提高

IF 2.7 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-21 DOI: 10.1002/macp.202500166

Songyi Xu, Chuanye Tong, Yi Xiang J. Wang, Jun Ling, Jihong Sun

{"title":"Synchronous Raises of Polymerization Rate and Controllability of N-Phenoxycarbonyl 3,4-Dihydroxy-l-Phenylalanine Catalyzed by Organic Acid and Base","authors":"Songyi Xu, Chuanye Tong, Yi Xiang J. Wang, Jun Ling, Jihong Sun","doi":"10.1002/macp.202500166","DOIUrl":"https://doi.org/10.1002/macp.202500166","url":null,"abstract":"<div>\u0000 \u0000 <p>A trade-off relationship between enhancing controllability and increasing reaction rate is always a challenge, as achieving better controlled polymerization typically requires reducing the reaction rate. Synchronous raises of polymerization rate and controllability require specially designed catalysts. In the contribution, living and controlled polymerizations of <i>N</i>-phenoxycarbonyl 3,4-dihydroxy-<span>l</span>-phenylalanine (DOPA-NPC) with increased rate are carried out using an organic “acid-and-base” catalytic system, producing poly(3,4-dihydroxy-<span>l</span>-phenylalanine) (PDOPA) with controlled molecular weights (6.3-16.1 kg/mol) and narrow distributions (<i>Đ</i> < 1.15). Kinetic studies demonstrate that benzoic acid effectively inhibits the side reaction to form 3,6-bis(3,4-dihydroxybenzyl)piperazine-2,5-dione (DDP) while <i>N</i>,<i>N</i>-diisopropylethylamine dramatically accelerates monomer consumption. PDOPA exhibits reversible chelation of ferric ions in proper pH ranges.</p>\u0000 </div>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 19","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functional Hydrogels for Wearable Electronics 可穿戴电子产品的功能水凝胶

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-18 DOI: 10.1002/macp.70047

Adnan Zameer, Yanxia Qin, Hongmei Xu, Quanduo Liang, Qiang Zhang

引用次数: 0

Issue Information: Macromol. Chem. Phys. 14/2025 发布信息：Macromol。化学。理论物理的14/2025

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-07-18 DOI: 10.1002/macp.70070

引用次数: 0