Polymer Chemistry最新文献_第8页

Multiblock copolymer nanoparticles RAFT emulsion polymerization: incorporation of a fluorine-containing functional monomer 多嵌段共聚物纳米颗粒RAFT乳液聚合：含氟功能单体的掺入

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00590j

Murtaza Khan,Thiago R. Guimarães,Pierre-Yves Dugas,Per B. Zetterlund

{"title":"Multiblock copolymer nanoparticles RAFT emulsion polymerization: incorporation of a fluorine-containing functional monomer","authors":"Murtaza Khan,Thiago R. Guimarães,Pierre-Yves Dugas,Per B. Zetterlund","doi":"10.1039/d6py00590j","DOIUrl":"https://doi.org/10.1039/d6py00590j","url":null,"abstract":"Multiblock copolymers provide a versatile platform for tailoring nanoscale organization and combining functional properties that are difficult to achieve with conventional polymer architectures. Here, we report the synthesis of fluorine-rich multiblock copolymer nanoparticles via one-pot surfactant-free RAFT emulsion polymerization in water using an amphiphilic macroRAFT agent. Sequential monomer additions enabled efficient chain extension and formation of well-defined multiblock architectures comprising n-butyl methacrylate (nBMA) and fluorinated statistical blocks of 2,2,3,4,4,4-hexafluorobutyl methacrylate (HFMA) and benzyl methacrylate (BzMA) in a one-pot system. Multiblock copolymer nanoparticles with high molecular weight were obtained with high monomer conversion in each polymerization cycle, controlled molecular weight distributions, and progressive particle growth without evidence of secondary nucleation. Cryogenic TEM confirmed controlled nanoparticle growth, while EDX-STEM elemental mapping verified successful incorporation of fluorinated segments within the nanoparticles. These results demonstrate that aqueous RAFT emulsion polymerization provides a robust and scalable route to fluorinated multiblock nanoparticles, enabling nanoscale confinement of highly incompatible fluorinated domains and opening opportunities for advanced functional materials.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"6 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148703555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Sustainable homogeneous copolymerization toward novel and spinnable polyborosilazane preceramic polymers in a liquid boron medium 新型可纺聚硼硅烷预陶瓷聚合物在液态硼介质中的可持续均相共聚

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00646a

Cai Ye,Xiaohong Li,Jianjun Chen

{"title":"Sustainable homogeneous copolymerization toward novel and spinnable polyborosilazane preceramic polymers in a liquid boron medium","authors":"Cai Ye,Xiaohong Li,Jianjun Chen","doi":"10.1039/d6py00646a","DOIUrl":"https://doi.org/10.1039/d6py00646a","url":null,"abstract":"Polyborosilazane (PBSZ) is a preceramic polymer for multicomponent SiBCN ceramics or ceramic fibers, and its chemical composition and molecular structure directly determine the comprehensive performance of the final ceramic products. Unlike conventional routes that rely on toxic boron sources (boron trichloride and borane dimethylsulfide), sustainable homogeneous copolymerization in a liquid boron medium was developed to synthesize spinnable polyborosilazane (PBSZ) precursors using a silazane oligomer (SZO) and tributyl borate (B(OBu)3) as comonomers. The copolymerization mechanism, elucidated through quantum chemical computations and experimental validation, involves the reaction between B–O/O–Bu bonds in B(OBu)3 and N–H/Si–H bonds in SZO to form B–N and Si–O–B covalent linkages. The boron atoms in PBSZ predominantly adopt sp2-hybridized trigonal planar configurations (BO3 and BN3) and sp3-hybridized BO4 tetrahedral units. By tuning the Si/B feed ratio of the comonomers, the molecular structure and properties can be controlled. The optimized PBSZ-2 precursor exhibits favorable spinnability, along with a ceramic yield of 60.34 wt% at 1600 °C. It is rich in high-molecular-weight components, with a number-average molecular weight (Mn) of 2368 g mol−1. The derived continuous SiBCN-2 ceramic fibers exhibit a uniform diameter (12.16 ± 0.73 μm), a smooth surface, a dense microstructure, and an average tensile strength of 1018 ± 258 MPa. This work demonstrates a sustainable and homogeneous copolymerization strategy for designing tailorable preceramic polymers for high-performance SiBCN ceramic fibers.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"12 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148858079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Controlled formulation of multi-compartment polymer vesicles based on poly(trimethylene carbonate) copolymers 基于聚碳酸三亚甲基共聚物的多室聚合物囊泡控制配方

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00473c

Yuzhe Ma,Fengyi Cai,Jiale Wei,Suzhen Wang,Congting Wei,Qiang Liu,Hailong Che

引用次数: 0

Acetal-linkages enabled eco-design of recyclable silicone materials 缩醛连接实现了可回收有机硅材料的生态设计

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00487c

Gefei Zhang,Shiyao Jia,Junjun Qin,Tao Wang,Wei Wei,Shengyu Feng,Dengxu Wang

引用次数: 0

Tuning spectral response and polymerization control in nitroxide-mediated photopolymerization (NMP) initiators chromophore substitution 氮氧化物介导光聚合（NMP）引发剂的光谱响应调谐和聚合控制

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00374e

Huayang Fang,Jennafer M. Davis,Andrew Chappell,Jon P. Scholte,C. Allan Guymon

{"title":"Tuning spectral response and polymerization control in nitroxide-mediated photopolymerization (NMP) initiators chromophore substitution","authors":"Huayang Fang,Jennafer M. Davis,Andrew Chappell,Jon P. Scholte,C. Allan Guymon","doi":"10.1039/d6py00374e","DOIUrl":"https://doi.org/10.1039/d6py00374e","url":null,"abstract":"Three alkoxyamine-based photoinitiators bearing benzophenone (NMP22), naphthol (NMP23), and anthracene (NMP24) chromophores were synthesized to investigate the effect of chromophore identity on spectral response and polymerization control in nitroxide-mediated photopolymerization (NMP2). UV–Vis spectroscopy showed that chromophore selection tuned light absorption across the 200–450 nm range, with the anthracene-based initiator 4 exhibiting the broadest photo-response, extending to 450 nm. Photolysis half-life (t1/2) varied by nearly two orders of magnitude across the series (14 s for 2; 920 s for 3), reflecting chromophore-dependent nitroxide radical stability. All three NMP2 initiators photopolymerized poly(hexyl acrylate) polymers with molecular weights up to nine times greater than a 2,2-dimethoxy-2-phenylacetophenone (DMPA) control and low polydispersity indices, with linear molecular weight growth and pseudo-first-order kinetics confirming controlled, “living” character. Additionally, these NMP2 systems exhibited slower photopolymerization rates than conventional initiators, consistent with the reversible activation-deactivation mechanism inherent to nitroxide-mediated polymerization. This study demonstrates that chromophore substitution provides a practical and tunable route to control radical photopolymerization across a broad range of UV and visible wavelengths.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"12 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148703499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A systematic investigation of poly(MAM)--poly(LAM) synthesis switchable RAFT polymerization employing both blocks as macro-chain transfer agents 系统研究了用两个嵌段作为大链转移剂的聚(MAM)-聚（LAM）合成可切换RAFT聚合

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00501b

P. M. Haribabu,Kari Vijayakrishna

{"title":"A systematic investigation of poly(MAM)--poly(LAM) synthesis switchable RAFT polymerization employing both blocks as macro-chain transfer agents","authors":"P. M. Haribabu,Kari Vijayakrishna","doi":"10.1039/d6py00501b","DOIUrl":"https://doi.org/10.1039/d6py00501b","url":null,"abstract":"Reversible addition–fragmentation chain transfer (RAFT) polymerization of structurally diverse monomers remains challenging with a single type of conventional chain transfer agent (CTA). This is due to limited compatibility with monomers having contrasting activation characteristics. In this work, we synthesized an ethyl piperazine-bearing dithiocarbamate-based RAFT agent that exhibits reversible protonation. The catalytic behaviour of both neutral (CTA-1) and protonated (CTA-2) forms of the CTA was systematically investigated towards less activated monomers (LAMs) and more activated monomers (MAMs) under identical reaction conditions. CTA-1 showed very good control over vinyl acetate (VAc) polymerization, affording poly(VAc) with low dispersity (Đ = 1.11), whereas poor control was observed for methyl methacrylate (MMA) polymerization (Đ = 1.86). In contrast, CTA-2 showed good control over MMA polymerization (Đ = 1.19) but showed poor control over VAc polymerization (Đ = 1.74). These results were further supported by the chain transfer coefficient (Ctr). The switchable CTA strategy was subsequently employed to synthesize block copolymers from both MAMs and LAMs as macro-CTAs. Deprotonation of CTA-2-derived poly(MMA) enabled successful chain extension with VAc, producing poly(MMA)-b-poly(VAc) with a molar mass that increased from 16 430 to 43 080 g mol−1 (Đ = 1.27). Conversely, protonation of CTA-1-derived poly(VAc) allowed chain extension with MMA, yielding poly(VAc)-b-poly(MMA) with a molar mass of 32 080 g mol−1 (Đ = 1.65). Furthermore, the selective hydrolysis of poly(t-BA)-b-poly(VAc) afforded a biocompatible amphiphilic poly(AA)-b-poly(VAc) block copolymer with potential biomedical applications.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"166 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148703501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Azulene-based conjugated microporous polymer integrated with hydrophobic vertical-channel aerogel for enhanced photothermal desalination 偶氮烯基共轭微孔聚合物与疏水垂直通道气凝胶集成用于增强光热脱盐

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00395h

Yuzhu Wang,Sijie Chen,Chenrui Zhang,Deshu Cheng,Yaozu Liao

{"title":"Azulene-based conjugated microporous polymer integrated with hydrophobic vertical-channel aerogel for enhanced photothermal desalination","authors":"Yuzhu Wang,Sijie Chen,Chenrui Zhang,Deshu Cheng,Yaozu Liao","doi":"10.1039/d6py00395h","DOIUrl":"https://doi.org/10.1039/d6py00395h","url":null,"abstract":"Conjugated microporous polymers (CMPs) possess tunable conjugated backbones and band structures, which promote broadband light absorption and non-radiative transition of photogenerated charge carriers, thereby endowing them with excellent photothermal conversion capability. However, conventional photothermal evaporation materials suffer from limited light absorption range and salt crystallization blockage, restricting the improvement of evaporation efficiency. In this work, we designed and synthesized a novel azulene-based conjugated microporous polymer (CMP-A) with moderate accessible porosity. Its asymmetric π-conjugated structure endows it with a broadband absorption of ∼92% in the range of 200–1400 nm and excellent photothermal conversion capability. Furthermore, we constructed the CMP-A@PVDF evaporator by loading CMP-A onto the top of a hydrophobic poly (vinylidene fluoride) (PVDF) aerogel with vertically aligned channels. The evaporator utilizes the hydrophobic vertical channels for rapid water transport and salt rejection, while enabling efficient photothermal evaporation via CMP-A. Under 1 sun irradiation, the CMP-A@PVDF evaporator achieves a high evaporation rate of 2.16 kg m−2 h−1 (5.14 times that of pure water) and a photothermal conversion efficiency as high as 98.2%. No salt accumulation is observed after 30 cycles, demonstrating excellent desalination performance and salt-resistant stability. This work provides a new design strategy for constructing high-performance photothermal materials.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"8 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148703529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Hafnium complexes supported by CNN-tridentate ligands containing an sp-C donor: synthesis, activation and unexpected catalysis in olefin polymerization 含sp-C供体的cnn -三齿配体支持的铪配合物：烯烃聚合中的合成、活化和意外催化

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00561f

Lingxiao Zhang,Lihang Jiang,Yukai Gong,Wuchao Cheng,Ze Kan,Shaofeng Liu,Zhibo Li

{"title":"Hafnium complexes supported by CNN-tridentate ligands containing an sp-C donor: synthesis, activation and unexpected catalysis in olefin polymerization","authors":"Lingxiao Zhang,Lihang Jiang,Yukai Gong,Wuchao Cheng,Ze Kan,Shaofeng Liu,Zhibo Li","doi":"10.1039/d6py00561f","DOIUrl":"https://doi.org/10.1039/d6py00561f","url":null,"abstract":"This study presents rare examples of hafnium complexes (Hf1–Hf4) bearing CNN-tridentate ligands with an sp3-C donor. Complexes Hf1–Hf4 were fully characterized by 1H and 13C NMR spectroscopy as well as single-crystal X-ray diffraction analysis, revealing the unusual activation of C(sp3)–H and the formation of Hf–C(sp3). These complexes showed high activity in ethylene homopolymerization and ethylene/α-olefin copolymerization (up to 33 750 kg(polymer) mol−1(Hf) h−1) and produced polymers with impressive molecular weights of up to 146.3 × 104 g mol−1. In terms of molecular weight distribution, Hf1 and Hf2 afforded polymers with bimodal distributions, while Hf3 and Hf4 produced polymers with unimodal distributions. For comparison, Hf5 with an sp2-C donor was also synthesized. The most significant difference between Hf1–Hf4 with an sp3-C donor and Hf5 with an sp2-C donor is their copolymerization capability, for which the latter synthesized copolymers with much higher 1-octene incorporation than the former under otherwise identical conditions. The activation of Hf complexes and the resulting active species was further studied by NMR and MS spectroscopy and DFT calculations to elucidate the underlying mechanism for these distinctive catalytic properties.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"35 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148858090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Sustainable bio-based polyesters organocatalyzed ring-opening alternating copolymerization and their adhesive applications 可持续生物基聚酯的有机催化开环交替共聚及其粘接应用

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00568c

Chaoxi Sun,Zhizhuang Li,You Xie,Yiwen Luo,Weihong Zeng,Fumin Liao,Yunjia Wang,Heng Li,He-Lou Xie

{"title":"Sustainable bio-based polyesters organocatalyzed ring-opening alternating copolymerization and their adhesive applications","authors":"Chaoxi Sun,Zhizhuang Li,You Xie,Yiwen Luo,Weihong Zeng,Fumin Liao,Yunjia Wang,Heng Li,He-Lou Xie","doi":"10.1039/d6py00568c","DOIUrl":"https://doi.org/10.1039/d6py00568c","url":null,"abstract":"Ring-opening alternating copolymerization (ROAP) of the bio-derived monomer 3,4-dihydrocoumarin (DHC) with epoxides represents a promising route to sustainable aromatic polyesters. However, existing catalytic systems often suffer from limited monomer scope and insufficient molar mass control due to undesired transesterification side reactions. Herein, we report a two-component organocatalytic system composed of organobases and triethylborane for the ROAP of DHC with various epoxides. This strategy affords well-defined aromatic polyesters with perfectly alternating sequences, relatively high molar masses (up to 10 kg mol−1), and narrow molar mass distributions (Đ < 1.25). The catalytic system exhibits broad monomer compatibility, enabling the copolymerization of DHC with propylene oxide, 1,2-butylene oxide, styrene oxide, allyl glycidyl ether, glycidyl methacrylate, cyclohexene oxide, and 4-vinylcyclohexene oxide. Furthermore, block copolymers with (AB)nCm and (AB)n(CB)m architectures are synthesized in a one-pot manner via sequential monomer addition following the ROAP stage. The resulting bio-based polyesters exhibit excellent thermal stability and undergo facile degradation under mild conditions. Moreover, a crosslinked formulation based on P(DHC-alt-AGE) demonstrates adhesive performance comparable to or surpassing that of commercial adhesives. This work provides an efficient platform for the controlled synthesis of DHC-based aromatic polyesters and highlights their potential as sustainable adhesive materials.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"10 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148703498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Nitrile oxide-mediated cycloaddition: a metal-free click platform for precision macromolecular materials 氧化腈介导的环加成：精密大分子材料的无金属点击平台

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2026-08-11 DOI: 10.1039/d6py00538a

Chenqi Shi,Jinkang Dou,Changwei Tang,Shuai Wang,Jing Zhang,Yucong Chen,Yujia Wen,Binghui Duan,Ying Guo,Ning Liu,Bojun Tan

引用次数: 0