Macromolecular Rapid Communications最新文献_第4页

A Hyperbranched Phosphorus/Nitrogen/Silicon-Containing Polymer as a Multifunctional Additive for Epoxy Resins. 作为环氧树脂多功能添加剂的超支化含磷/氮/硅聚合物

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-11 DOI: 10.1002/marc.202400801

Qian Zhong, Siqi Huo, Cheng Wang, Guofeng Ye, Qi Zhang, Hao Wang, Zhitian Liu

{"title":"A Hyperbranched Phosphorus/Nitrogen/Silicon-Containing Polymer as a Multifunctional Additive for Epoxy Resins.","authors":"Qian Zhong, Siqi Huo, Cheng Wang, Guofeng Ye, Qi Zhang, Hao Wang, Zhitian Liu","doi":"10.1002/marc.202400801","DOIUrl":"https://doi.org/10.1002/marc.202400801","url":null,"abstract":"High-performance, versatile epoxy resins (EPs) are used in a variety of fields, but the manufacture of transparent, fireproof, and strong EPs remains a major challenge. The hyperbranched, multifunctional flame retardant (DSi) is prepared by using diethanolamine, polyformaldehyde, diphenylphosphine oxide, and phenyltrimethoxysilane as raw materials in this work. When the additional amount of DSi is only 2 wt.%, the EP-DSi2 sample reaches a vertical burning (UL-94) V-0, and its limiting oxygen index (LOI) is 32.8%. When the content of DSi is 3 wt.%, the peak heat release rate (PHRR) and total smoke production (TSP) of EP-DSi samples are 43.8% and 21.4% lower than those of EP. The good compatibility of DSi and EP endows EP-DSi with high transparency, and the hyperbranched structure of DSi makes EP-DSi have obviously enhanced mechanical strength and toughness. The enhanced fire safety of EP-DSi is mainly due to the promoting carbonization and radical quenching effects of DSi. This paper offers a comprehensive design concept aimed at creating high-performance epoxy resins with good optical, mechanical, and flame-retardant properties, which have broad application prospects.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400801"},"PeriodicalIF":4.2,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Chemical and Solvent-Based Recycling of DGEBA-Based Epoxy Thermoset and Carbon-Fiber Reinforced Epoxy Composite Utilizing Imine-Containing Secondary Amine Hardener. 利用含亚胺的仲胺固化剂对基于 DGEBA 的环氧热固性和碳纤维增强环氧复合材料进行化学和溶剂回收。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-09 DOI: 10.1002/marc.202400678

Özgün Dağlar, Tankut Türel, Christos Pantazidis, Željko Tomović

{"title":"Chemical and Solvent-Based Recycling of DGEBA-Based Epoxy Thermoset and Carbon-Fiber Reinforced Epoxy Composite Utilizing Imine-Containing Secondary Amine Hardener.","authors":"Özgün Dağlar, Tankut Türel, Christos Pantazidis, Željko Tomović","doi":"10.1002/marc.202400678","DOIUrl":"https://doi.org/10.1002/marc.202400678","url":null,"abstract":"Epoxy systems are essential in numerous industrial applications due to their exceptional mechanical properties, thermal stability, and chemical resistance. Yet, recycling epoxy networks and reinforcing materials in epoxy composites remains challenging, raising environmental concerns. The critical challenge is the recovery of well-defined molecules upon depolymerization. To address these issues, an innovative strategy is developed utilizing imine-containing secondary amine hardener (M1). The reaction of M1 with DGEBA produced high-performance epoxy thermoset P1, which exhibits Young's modulus of 2.18 GPa and tensile strength of 63.4 MPa, and excellent stability in neutral aqueous conditions. Upon carbon-fiber reinforcement, Young's modulus and tensile strength are significantly elevated to 10.99 GPa and 328.3 MPa, respectively. The reactive secondary amine functionalities enabled the tailored network to display a well-defined growth pattern, yielding only well-defined molecules and intact carbon fibers upon acidic depolymerization. Consequently, the recycled polymers retained properties identical to those of P1. Notably, it is discovered that despite the cross-linked nature of the epoxy networks, complete dissolution in dichloromethane facilitated straightforward solvent-based recycling, allowing the recovery of undamaged carbon fibers and an epoxy thermoset with properties matching the virgin material. Presented novel monomer design and approach showcased two important and efficient recycling options for epoxy systems.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400678"},"PeriodicalIF":4.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Enhanced Emission in Polyelectrolyte Assemblies for the Development of Artificial Light-Harvesting Systems and Color-Tunable LED Device. 为开发人工光收集系统和色彩可调 LED 设备而增强聚电解质组件的发射。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-09 DOI: 10.1002/marc.202400752

Qunpeng Duan, Xiuxiu Li, Zhiying Wu, Shihao Lin, Rong Zeng, Tangxin Xiao

引用次数: 0

Sequence-Controlled Copolymerization of Structurally Well-Defined Multinuclear Zinc Acrylate Complexes and Styrene. 结构明确的多核丙烯酸锌络合物与苯乙烯的序列控制共聚。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-09 DOI: 10.1002/marc.202400742

Takanori Iwasaki, Gaito Suehisa, Ryo Mandai, Kyoko Nozaki

{"title":"Sequence-Controlled Copolymerization of Structurally Well-Defined Multinuclear Zinc Acrylate Complexes and Styrene.","authors":"Takanori Iwasaki, Gaito Suehisa, Ryo Mandai, Kyoko Nozaki","doi":"10.1002/marc.202400742","DOIUrl":"https://doi.org/10.1002/marc.202400742","url":null,"abstract":"The copolymerization of two or more monomers produces polymeric materials with unique properties that cannot be achieved with homopolymers. However, precise control over the polymer sequence remains challenging because the sequence is determined by the inherent reactivity of comonomers. Therefore, only limited methods using modified monomers or supramolecular interactions are reported. In this study, the sequence control of acrylate-styrene copolymerization using multinuclear zinc complexes is reported. The copolymerization of the zinc acrylate complex with a polymeric sheet-like structure and styrene in benzene affords a copolymer with a higher content of acrylate triad than calculated for the statistical random model, whereas tetranuclear zinc acrylate (TZA) affords a copolymer with fewer adjacent acrylate sequences. The copolymer with a higher content of acrylate triad exhibits a lower glass transition temperature because of the higher mobility of the longer polystyrene segments. These results highlight the promise of multinuclear zinc acrylate complexes as monomers for sequence-controlled copolymerization.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400742"},"PeriodicalIF":4.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Masthead: Macromol. Rapid Commun. 21/2024 刊头：Macromol.Rapid Commun.21/2024

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-08 DOI: 10.1002/marc.202470045

引用次数: 0

Solidification of Polyurethane Model Foams via Catalyst Drainage from a Secondary Foam 通过催化剂从二次泡沫中排出实现聚氨酯模型泡沫的固化

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-08 DOI: 10.1002/marc.202470044

Manon Jouanlanne, Antoine Egelé, Wiebke Drenckhan, Jean Farago, Aurélie Hourlier-Fargette

引用次数: 0

Fast Dissolution of Chitin in Amino Acids Based Deep Eutectic Solvents Under the Assistance of Microwave. 微波辅助下甲壳素在基于氨基酸的深共晶溶剂中的快速溶解。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-08 DOI: 10.1002/marc.202400685

Jiake Wang, Chao Qin, Bingxia Xu, Lifeng Yan

引用次数: 0

Rapid, Controlled Branching Polymerization of Cyanoacrylate via Pathway-Enabled, Site-Specific Branching Initiation. 通过特定位点支化引发途径实现快速、可控的氰基丙烯酸酯支化聚合。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-08 DOI: 10.1002/marc.202400658

Alexander Perez Roxas, Han Yu, Mohsen Tamtaji, Zhenggen Yang, Zhengtang Luo

{"title":"Rapid, Controlled Branching Polymerization of Cyanoacrylate via Pathway-Enabled, Site-Specific Branching Initiation.","authors":"Alexander Perez Roxas, Han Yu, Mohsen Tamtaji, Zhenggen Yang, Zhengtang Luo","doi":"10.1002/marc.202400658","DOIUrl":"https://doi.org/10.1002/marc.202400658","url":null,"abstract":"Controlled branched structures remain a key synthetic limitation for monomeric tissue adhesives because their on-site polymerization that enables adhesion formation requires rapid kinetics, high conversion, and straightforward setup. In this context, site-specific branching initiation by using evolmers is potentially effective for structural control; however, the efficiency and kinetics in current reaction setups persists to be a major challenge. In this paper, an evolmer induces a controlled branching polymerization of cyanoacrylate amid the high monomer reactivity useful in rapid adhesion. The contrasting reactivities between the vinyl and the initiating groups in the evolmer molecule generate a kinetic pathway that favors a control-enabling branching mechanism. Through density functional theory calculations, the reaction pathway toward branching is shown to kinetically favor site-specific initiation by six orders of magnitude than the route toward non-specificity. Reaction monitoring confirms the branching polymerization after the polymerization with the evolmer forms a more compact structure than the linear counterpart. Control of branching density is demonstrated in rapid polymerizations within minutes and in polymerizations completed in an instant. These results provide a template for achieving site-specific branching initiation during adhesion formation and, broadly, where conditions for kinetic control are necessary.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400658"},"PeriodicalIF":4.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Varying the Core Topology in All-Glycidol Hyperbranched Polyglycerols: Synthesis and Physical Characterization. 改变全缩水甘油超支化甘油的核心拓扑结构：合成与物理特性。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-05 DOI: 10.1002/marc.202400791

Carlo Andrea Pagnacco, Alberto Alvarez-Fernandez, Armando Maestro, Estíbaliz González de San Román, Reidar Lund, Fabienne Barroso-Bujans

{"title":"Varying the Core Topology in All-Glycidol Hyperbranched Polyglycerols: Synthesis and Physical Characterization.","authors":"Carlo Andrea Pagnacco, Alberto Alvarez-Fernandez, Armando Maestro, Estíbaliz González de San Román, Reidar Lund, Fabienne Barroso-Bujans","doi":"10.1002/marc.202400791","DOIUrl":"https://doi.org/10.1002/marc.202400791","url":null,"abstract":"In the present study, low molecular weight cyclic polyglycidol is used as a macroinitiator for hypergrafting glycidol and producing cyclic graft hyperbranched polyglycerol (cPG-g-hbPG) in the molecular weight range of 103-106 g mol-1. Linear graft hyperbranched polyglycerol (linPG-g-hbPG) and hyperbranched polyglycerol (hbPG) are prepared as reference samples. This creates a family of hbPG structures with cyclic, linear, and star cores, allowing to evaluate their properties in solution and in bulk. The morphology study of the high molecular weight structures using atomic force microscopy revealed a spherical shape for cPG-g-hbPG and hbPG, and a cylindrical shape for linPG-g-hbPG in the nanometric range. Small angle X-ray scattering confirmed the compact particle-like structure of this family of hbPG architectures. Interestingly, the glass transition temperature showed a structure dependence, with cPG-g-hbPG having the highest values and hbPG having the lowest values for the same molecular weight. This study is a step forward in the generation of water-soluble polymers with tailored structure and functionality for advanced applications.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400791"},"PeriodicalIF":4.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

α-Trifluoromethylated Quinolines as Safe and Storable PET-Donor for Radical Polymerizations. α-三氟甲基化喹啉作为用于自由基聚合的安全稳定的 PET 给体。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-11-05 DOI: 10.1002/marc.202400710

Arona Fall, Guillaume Tintori, Marion Rollet, Yuxi Zhao, Amandine Avenel, Laurence Charles, David Bergé-Lefranc, Jean Louis Clément, Sébastien Redon, Didier Gigmes, Miquel Huix-Rotllant, Patrice Vanelle, Julie Broggi

引用次数: 0