Reactive & Functional Polymers最新文献_第8页

Impact of cyclic backbone and thioether functionality on thermoresponsive behaviors of multi-responsive Y-junction-bearing polyacrylamides 环状骨架和硫醚官能团对多反应 Y 型接点聚丙烯酰胺热致伸缩行为的影响

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-23 DOI: 10.1016/j.reactfunctpolym.2024.105996

Ran Chen, Meng Zhang, Fujin Duan, Qingqing Wang, Jinqian Zhang, Youliang Zhao

{"title":"Impact of cyclic backbone and thioether functionality on thermoresponsive behaviors of multi-responsive Y-junction-bearing polyacrylamides","authors":"Ran Chen, Meng Zhang, Fujin Duan, Qingqing Wang, Jinqian Zhang, Youliang Zhao","doi":"10.1016/j.reactfunctpolym.2024.105996","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105996","url":null,"abstract":"<div><p>Alteration of chemical composition and chain topology of polymers allows for the rational regulation of their thermoresponsive behaviors. Compared with oxyether group, thioether moiety with higher hydrophobicity and oxidation sensitivity is proposed to present some differences in phase transition. To elucidate cyclization and thioether functionality dependent thermoresponsive behaviors, two pairs of thermo/pH/oxidation-responsive linear and cyclic Y-junction-bearing polymers (YJPs) involving dual thioether groups or coexistent thioether and oxyether moieties are designed. Multi-tunable LCST behavior can be achieved upon variations of hydrogen bonding, electrostatic and hydrophobic interactions. Owing to distinct stability of supramolecular interactions, copolymer solutions prepared by direct dispersion or self-assembly are liable to present a reverse order of phase transition temperature (<em>T</em><sub>c,l</sub>) relying on the thioether functionality. Cyclization of the backbone can result in an elevated <em>T</em><sub>c,l</sub> up to about 14 °C, revealing Y-junction-induced amplification of topology effect. <em>T</em><sub>c,l</sub> is prone to decreasing upon solvent switch from water to heavy water or pH increment, while the distinct oxidation sensitivity of monothioether and dithioether groups affords oxidation-triggered LCST “on/off” behaviors. In addition, intriguing sphere-to-vesicle-to-lamella-to-vesicle, vesicle-to-lamella-to-sphere and lamella-to-nanoribbon-to-lamella transitions occur in thermo-induced self-assembly. The success of this study paves the way for exploring thioether functionality dependent physicochemical properties and multipurpose applications of complex architectural polymers.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Rational design and efficient synthesis of cyclic polymers with visualized molecular topology and unique dielectric properties 合理设计和高效合成具有可视化分子拓扑结构和独特介电性能的环状聚合物

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-23 DOI: 10.1016/j.reactfunctpolym.2024.105995

Hao Wang, Qiubo Wang, Xiaojuan Liao, Ruyi Sun, Meiran Xie

{"title":"Rational design and efficient synthesis of cyclic polymers with visualized molecular topology and unique dielectric properties","authors":"Hao Wang, Qiubo Wang, Xiaojuan Liao, Ruyi Sun, Meiran Xie","doi":"10.1016/j.reactfunctpolym.2024.105995","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105995","url":null,"abstract":"<div><p>Cyclic polymers without chain ends have attracted increasing attention because of the unique physical properties. However, the direct visualization of cyclic topology remains a formidable challenge, because the cyclic chains with flexible backbone or strong intramolecular interaction usually existed in a coiled state rather than cyclic topology. Herein, monocyclic and bicyclic polymers were prepared via blocking-cyclization technique, and the molecular topology of cyclic polymer containing phenyl pendant was directly observed depending on the reduced intrachain entanglement. The structure and characteristics of cyclic polymers were investigated, and the difference between cyclic polymer and linear counterpart was demonstrated. Compared to linear polymer, cyclic polymer exhibited improved dielectric properties, and bicyclic polymer displayed further increased dielectric constant and energy storage density than monocyclic polymer possessing the same repeating units. Therefore, this research presents a facile strategy in the design and construction of cyclic polymers with directly visualized topology and unique dielectric properties.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shape recovery and reprocessing of polyurethane networks crosslinked via host-guest inclusion complexation of adamantane with β-cyclodextrin 通过金刚烷与β-环糊精的主客体包合复合物交联的聚氨酯网络的形状恢复和再加工

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-23 DOI: 10.1016/j.reactfunctpolym.2024.105998

Jie Xu, Huaming Wang, Tao Zhang, Lei Li, Sixun Zheng

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Adhesive and healable supramolecular comb-polymers 可粘合、可愈合的超分子组合聚合物

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-22 DOI: 10.1016/j.reactfunctpolym.2024.105994

Zhenping Shi , Matthew Hyder , Alarqam Z. Tareq , Ann M. Chippindale , James A. Cooper , Josephine L. Harries , Wayne Hayes

{"title":"Adhesive and healable supramolecular comb-polymers","authors":"Zhenping Shi , Matthew Hyder , Alarqam Z. Tareq , Ann M. Chippindale , James A. Cooper , Josephine L. Harries , Wayne Hayes","doi":"10.1016/j.reactfunctpolym.2024.105994","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105994","url":null,"abstract":"<div><p>A series of supramolecular comb polymers (SCPs) with adhesive and healable characteristics have been generated through the copolymerisation of methacrylate monomers featuring aromatic amide functionalities with lauryl methacrylate. By varying the amide functionality and loading of the supramolecular monomers, the properties of the resulting SCPs can be tailored, ultimately providing stable films at room temperature. As the loading of the amide-bearing monomer was increased, the phase separation between the hard and soft domains was enhanced, promoting larger hard-domain aggregation, as observed via atomic force microscopy (AFM). The mechanical properties of the SCPs correlated to the loading of the amide-bearing monomers, by increasing the mol% incorporation the resulting SCPs transition from possessing high strain to high ultimate tensile strength (UTS) and Young's modulus (YM). Over several re-adhesion cycles, the SCPs were shown to retain their shear strength when thermally adhered to both glass and aluminium substrates. Additionally, the SCPs exhibited healable properties at elevated temperatures (> 45 °C) allowing for the recovery of mechanical properties post-damage.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S138151482400169X/pdfft?md5=baf329c34a7c7297dd019e32b5b0eb0f&pid=1-s2.0-S138151482400169X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Synthesis and self-assembly of high grafting density core-shell bottlebrush polymer with amphiphilic side chain 具有两亲性侧链的高接枝密度核壳瓶丛聚合物的合成与自组装

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-22 DOI: 10.1016/j.reactfunctpolym.2024.105997

Jiawei Zhang , Xiaoyan Yuan , Zongquan Wu , Lixia Ren

{"title":"Synthesis and self-assembly of high grafting density core-shell bottlebrush polymer with amphiphilic side chain","authors":"Jiawei Zhang , Xiaoyan Yuan , Zongquan Wu , Lixia Ren","doi":"10.1016/j.reactfunctpolym.2024.105997","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105997","url":null,"abstract":"<div><p>Self-assembly of bottlebrush polymers are widely studied in photonic bandgap materials, biomedical materials and nanomaterial with different structures. In this work, high grafting density bottlebrush polymer with amphiphilic QPDMA[FeCl<sub>4</sub>]-<em>b</em>-PS side chains grafting on every carbon atom of the backbone are prepared via grafting from approach. The para-isocyanobenzoate monomer modified with chain transfer agent (CTA) is designed and synthesized to prepared polymer backbones with CTA grafting on each atoms. The core-shell bottlebrush block copolymer is prepared by sequential reversible addition-fragmentation chain transfer polymerization of dimethylaminoethyl methacrylate and styrene. The inner core follows quaternization and ion exchange to form water soluble QPDMA[FeCl<sub>4</sub>] magnetic block. The resulting core-shell bottlebrush magnetic polymer (PCN-<em>g</em>-[QPDMA[FeCl<sub>4</sub>]-<em>b</em>-PS]) self-assembles into nanowires with magnetic QPDMA[FeCl<sub>4</sub>] as core and PS as corona in the shell selected solvent dichloromethane, the length of nanowires increases with self-assembly time. While it self-assembles into nanoparticle clusters in core selected aqueous solution. And, the thermal and magnetic properties are affected by the self-assembly morphology. Especially, the as prepared PCN-<em>g</em>-[QPDMA[FeCl<sub>4</sub>]-<em>b</em>-PS] and the nanoparticles cluster self-assembly are paramagnetic, but the nanowire self-assembly is superparamagnetic.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ borneol-modified polyester with antibacterial adhesion and long-term fungal-repellent properties 具有抗菌粘附性和长期斥真菌特性的原位苯酚改性聚酯

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-22 DOI: 10.1016/j.reactfunctpolym.2024.105993

Zixu Xie , Chen Chen , Xinyu Chen , Fanqiang Bu , Guofeng Li , Pengfei Zhang , Xing Wang

{"title":"In situ borneol-modified polyester with antibacterial adhesion and long-term fungal-repellent properties","authors":"Zixu Xie , Chen Chen , Xinyu Chen , Fanqiang Bu , Guofeng Li , Pengfei Zhang , Xing Wang","doi":"10.1016/j.reactfunctpolym.2024.105993","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105993","url":null,"abstract":"<div><p>Polyester is widely used in biomedical, textile, and food packaging fields. Therefore, enhancing it with antimicrobial properties would be a significant advancement. In this paper, a series of borneol-triazine polyesters (BTPs) with different structures are synthesized through room temperature polycondensation. The structure and composition of BTPs are systematically characterized by <sup>1</sup>H NMR, FTIR and GPC. Antimicrobial results reveal that the ability of BTPs to resist bacterial or fungal adhesion is directly related to the polymer structure. When the polymer chain of BTPs adopts a rigid structure, they exhibit excellent anti-adhesive and inhibitory performances against both Gram-negative bacteria (<em>Escherichia coli</em>) and Gram-positive bacteria (<em>Staphylococcus aureus</em>). Meanwhile, the as-synthesized BTPs poses a fungal-repelling effect on common fungal strains (<em>Aspergillus niger</em>) for up to 30 d. Further studies have shown that a stereochemical structure brought by borneol is key for imparting effective antimicrobial properties to BTPs. In addition, BTPs are non-leaching materials with low cellular cytotoxicity. Taking into consideration, BTP provides a potential strategy for preparing a new class of antimicrobial polyester materials.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-responsive, highly bacteriostatic and swellable chitosan-based hydrogels loaded with 5-fluorouracil for sustainable release 载入 5-氟尿嘧啶的双响应、高抑菌性和可溶胀壳聚糖基水凝胶可实现持续释放

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-20 DOI: 10.1016/j.reactfunctpolym.2024.105992

Yaxue Xie , Pingxiong Cai , Huining Xiao , Yuanfeng Pan

{"title":"Dual-responsive, highly bacteriostatic and swellable chitosan-based hydrogels loaded with 5-fluorouracil for sustainable release","authors":"Yaxue Xie , Pingxiong Cai , Huining Xiao , Yuanfeng Pan","doi":"10.1016/j.reactfunctpolym.2024.105992","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105992","url":null,"abstract":"<div><p>In this work, a dual-responsive hydrogel for sustainable release of drug was prepared using chitosan grafted with PBA as substrate to form semi-interpenetrating polymer networks (S-IPN) via free-radical crosslinking polymerization of acrylic acid in the presence of MBAA as a crosslinker and KPS as an initiator as well as Fe<sup>3+</sup>.ions introduced. The results from comprehensive characterization indicated that the as-prepared hydrogel possesses cavity structure with the pores of varying sizes, thus facilitating the accommodation of 5-fluorouracil as a model drug. In addition, the swelling behavior of the hydrogels in different pH buffers and glucose solutions was also investigated. As expected, the prepared hydrogels are pH and glucose responsive due to PAA and phenylboronic acid incorporated into the hydrogel, which enables the slow or sustainable release of drug. Moreover, the release processes were fitted with various kinetic models whereas the release was better described by Korsmeyer-Peppas model or the drug release is mainly governed by the release mechanism of the hydrogel is primarily driven by Fickian diffusion from a mechanical point of view. Hydrogel loaded with drug was found to have good antibacterial effects against <em>E. coli</em> and <em>S. aureus,</em> leading to the potential for various medical-related applications.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poly(lactic acid)/polycaprolactone-based self-programmed photothermal responsive shape memory polymers 基于聚（乳酸）/聚己内酯的自编程光热响应形状记忆聚合物

IF 4.5 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-17 DOI: 10.1016/j.reactfunctpolym.2024.105990

Lijie Huang , Yao Sheng , Qi Mo , Shuya Zhang , Yuluo Zheng , Beiwei Wang , Chongxing Huang , Qingshan Duan , Hui Zhao

{"title":"Poly(lactic acid)/polycaprolactone-based self-programmed photothermal responsive shape memory polymers","authors":"Lijie Huang , Yao Sheng , Qi Mo , Shuya Zhang , Yuluo Zheng , Beiwei Wang , Chongxing Huang , Qingshan Duan , Hui Zhao","doi":"10.1016/j.reactfunctpolym.2024.105990","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105990","url":null,"abstract":"<div><p>Shape memory polymers, based on their unique property that they can automatically revert to their original shape after deformation when subjected to external stimuli, have shown great application prospects and practical value in many fields such as aerospace, automotive and biomedical in recent years. In this study, poly(lactic acid) (PLA)/polycaprolactone (PCL) is used as a substrate, and a graft product, PLA-g-GMA, is prepared by grafting glycidyl methacrylate (GMA) onto PLA as a compatibilizer, and then polymer substrates are prepared by melt extrusion. Then, light-responsive shape memory composites are prepared by loading polypyrrole (PPy) nanoparticles with photothermal conversion functionality into the PLA/PCL substrate, and PPy-coated NdFeB (PPy@NdFeB) is used as the functional phase to prepare auto-responsive shape memory polymers that can be programmed automatically. Among them, the PLA/PCL/PPy composites show shape recovery rate (R<sub>r</sub>) and shape fixation rate (R<sub>f</sub>) of 81.11% and 98.87%, respectively, at a strain of 85.27% under the programming conditions of a deformation temperature of 65 °C and a stress of 2.14 MPa. The PLA/PCL/PPy@NdFeB composite material, in addition to excellent double and triple shape memory behavior, also has obvious magnetic properties, which can be used to carry out self-programmed temporary shapes. This research aims to solve the limitations of temperature-responsive shape memory polymers in a single stimulus response mode, broaden their application scope, further promote the development of shape memory polymers, and provide realistic guidance for the field of 4D printing.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141444434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Esterification modified corn starch composite with chitosan and PVP for enhanced mechanical properties and antimicrobial freshness preservation of starch-based films 壳聚糖和 PVP 与玉米淀粉的酯化改性复合材料可提高淀粉基薄膜的机械性能和抗菌保鲜性能

IF 5.1 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-17 DOI: 10.1016/j.reactfunctpolym.2024.105991

Dequan Wei , Shenghua Lv , Jinru Liu , Jingjing Zuo , Yanlu Mu , Leipeng Liu , Tingxiang He , Qiao Zeng

{"title":"Esterification modified corn starch composite with chitosan and PVP for enhanced mechanical properties and antimicrobial freshness preservation of starch-based films","authors":"Dequan Wei , Shenghua Lv , Jinru Liu , Jingjing Zuo , Yanlu Mu , Leipeng Liu , Tingxiang He , Qiao Zeng","doi":"10.1016/j.reactfunctpolym.2024.105991","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.105991","url":null,"abstract":"<div><p>Traditional plastic packaging films may bring convenience to people, but may also bring fossil energy shortage and pollution problems. Thus, it is of great research significance to use renewable resources to develop biodegradable green packaging materials instead of traditional petroleum-based film materials. In this study, aryl esterified starch was prepared by graft modification of corn starch using acryloyl esterification. Then ES/CS/PVP composite film materials were prepared by introducing chitosan and polyvinylpyrrolidone (PVP) from esterified starch. Chitosan and PVP were introduced to greatly improve the antimicrobial and mechanical properties of the composite film. And the chemical structure and microscopic morphology of ES/CS/PVP were characterised by FT-IR, XRD, SEM and XPS. The results showed that the ES/CS/PVP composite film had excellent tensile properties and good antimicrobial freshness preservation properties. The maximum tensile strength reached 51.69 MPa and the water vapour permeability was 4.76 × 10<sup>−5</sup> g/mm∙d. The results of antimicrobial freshness preservation experiments show that the composite film has excellent antimicrobial freshness preservation performance, enough to keep cherries with good freshness in 6 days.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141429767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Meldrum's acid-functionalized bismaleimide, polyaspartimide and their thermally crosslinked resins: Synthesis and properties 梅尔德伦酸官能化双马来酰亚胺、聚天冬氨酰亚胺及其热交联树脂：合成与性能

IF 5.1 3区工程技术

Reactive & Functional Polymers Pub Date : 2024-06-15 DOI: 10.1016/j.reactfunctpolym.2024.105988

Chao-Chun Hsiao, Jia-Jun Lee, Ying-Ling Liu

引用次数: 0