Polymer Chemistry最新文献

Emulsion Polymerisation Stabilised by Block-Random Copolymers: Ultra-Small Particles at Low Stabiliser Levels 由嵌段无规共聚物稳定的乳液聚合：低稳定剂水平下的超小颗粒

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-16 DOI: 10.1039/d5py00884k

Arthur Werner, Connor A. Sanders, Sandra Smeltzer, Michael F. Cunningham

引用次数: 0

Reversible Addition-Fragmentation Chain Transfer Depolymerization of Poly(methyl methacrylate) in Toluene 聚甲基丙烯酸甲酯在甲苯中的可逆加成-断裂链转移解聚

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-14 DOI: 10.1039/d5py00576k

Don Bones, Adarsh Kumar, Emily Nelson, Bryanna Fofie, Erik P. Hoy, William Mike Gramlich

{"title":"Reversible Addition-Fragmentation Chain Transfer Depolymerization of Poly(methyl methacrylate) in Toluene","authors":"Don Bones, Adarsh Kumar, Emily Nelson, Bryanna Fofie, Erik P. Hoy, William Mike Gramlich","doi":"10.1039/d5py00576k","DOIUrl":"https://doi.org/10.1039/d5py00576k","url":null,"abstract":"Controlled depolymerizations of poly(methyl methacrylate) (PMMA) via reversible addition fragmentation chain transfer (RAFT) reach higher yields in some solvents rather than others, and the exact reasons are not fully understood. PMMA was synthesized with trithiocarbonate (TTC) and dithiobenzoate (DTB) end groups to study depolymerization in toluene, which has been reported to have a lower monomer yield than other solvents. In toluene, the depolymerization kinetics were found to have two regions: one assisted by solvent-derived impurities and another being primarily self-initiation. Using a rate order analysis, we found evidence that initiation can lead to simultaneous homolysis of the RAFT end group and the depropagation of one monomer. Additionally, DTB end groups had a greater tendency than TTC end groups to undergo elimination, terminating the active depropagating center and limiting depolymerization extent. Radical thermal initiators were added into PMMA depolymerizations in toluene, demonstrating that di-tert-butyl peroxide can increase the conversion of polymer to monomer for TTC end groups.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"13 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283594","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

Upcycling of polymer waste to closed-loop recyclable polymers 将废弃聚合物升级为闭环可回收聚合物

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-13 DOI: 10.1039/d5py00858a

Sourabh Singh, Ramkrishna Sarkar

{"title":"Upcycling of polymer waste to closed-loop recyclable polymers","authors":"Sourabh Singh, Ramkrishna Sarkar","doi":"10.1039/d5py00858a","DOIUrl":"https://doi.org/10.1039/d5py00858a","url":null,"abstract":"This study presents a novel approach aimed at developing the reclamation of waste plastics and the utilization of biobased resources to develop sustainable and closed-loop recyclable polymers. Specifically, it focuses on the integration of diol monomers, bis(2-(2-hydroxyethoxy)ethyl)terephthalamide (BHEETA) derived from the chemical recycling of the waste polyethylene terephthalate (PET), with renewable fatty acidderived diester, to produce a long hydrocarbon bearing poly(ester amide). A series of polymers was prepared under solvent-free conditions via melt transesterification of the BHEETA with dimethyl esters of varying chain lengths, specifically ranging from fourteen to eighteen backbone carbon atoms. The properties of these polymers, which include crystallinity and melting temperature, were regulated with the diester chain length. The polymers exhibited excellent thermal stability and high melting and crystallisation temperatures owing to the presence of the long hydrocarbon chain. Finally, to achieve the closed-loop circular economy, the polymer was chemically degraded to its monomers. The degraded monomers can be easily separated and purified to recover the monomers in high purity and yield (>90%). The recovered monomers were used to regenerate the polymer with near-identical material properties. This report presents a strategy to upcycle the waste polymer and the utilization of bio-derived feedstocks towards the development of a sustainable polymer. To the best of our knowledge, this is the first study to detail the closed-loop recycling of polyester amide derived from PET waste and long-chain fatty acids.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"4 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283592","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

Enhanced Suppression of Chain Transfer in Ethylene (Co)Polymerization via Synergistic Axial Substituent Effects in Pyridine-Imine Ni(II) and Pd(II) Catalysts 吡啶-亚胺型Ni（II）和Pd（II）催化剂轴取代基协同效应对乙烯（Co）聚合链转移的抑制作用

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-13 DOI: 10.1039/d5py00857c

Huijun Fan, Mengya Ma, Shengyu Dai

{"title":"Enhanced Suppression of Chain Transfer in Ethylene (Co)Polymerization via Synergistic Axial Substituent Effects in Pyridine-Imine Ni(II) and Pd(II) Catalysts","authors":"Huijun Fan, Mengya Ma, Shengyu Dai","doi":"10.1039/d5py00857c","DOIUrl":"https://doi.org/10.1039/d5py00857c","url":null,"abstract":"Controlling chain-transfer reactions represents a fundamental challenge in pyridine-imine nickel and palladium catalyzed ethylene (co)polymerization. We present a breakthrough dualaxial-substituent strategy that synergistically suppresses chain transfer, enabling efficient production of high-molecular-weight polyethylenes and polar functionalized copolymers. A family of well-defined nickel and palladium complexes featuring both 8-benzhydryl and 2diarylmethyl naphthylpyridine-iminate ligands were synthesized and thoroughly characterized.The nickel catalysts, activated by diethylaluminum chloride, showed moderate activities (~10⁵ g mol⁻¹ h⁻¹) while producing branched polyethylene with high molecular weights (Mn up to 246.4 kg/mol) -an order of magnitude higher than single-substituent control systems.Remarkably, analogous palladium catalysts generated hyperbranched polyethylenes with M up to 43.8 kg/mol. These systems further achieved outstanding methyl acrylate incorporation (up to 13 mol%) in copolymerizations while maintaining practical molecular weights (4.1-8.4 kg/mol). Mechanistic studies reveal that cooperative shielding of both axial sites by the dual substituents prevents displacement of active intermediates, while the flexible 8benzhydrylnaphthyl moiety enhances activity 5-7-fold compared to rigid analogues by facilitating ethylene coordination. This work establishes new design principles for chaintransfer suppression in late-transition-metal polymerization catalysis.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"120 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283595","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

High-performance anthrone-based low-migration photoinitiators for low-power photopolymerization 用于低功率光聚合的高性能蒽酮类低迁移光引发剂

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-13 DOI: 10.1039/d5py00786k

Xinquan Wang, Zecong Ye, Hui Liang, Shaomin Ji, Yanping Huo, Yingxiao Mu

{"title":"High-performance anthrone-based low-migration photoinitiators for low-power photopolymerization","authors":"Xinquan Wang, Zecong Ye, Hui Liang, Shaomin Ji, Yanping Huo, Yingxiao Mu","doi":"10.1039/d5py00786k","DOIUrl":"https://doi.org/10.1039/d5py00786k","url":null,"abstract":"In this work, anthrone-based donor-acceptor-donor type photoinitiators (DXD and DTD) were synthesized and introduced into a two-component system with diphenylIodonium hexafluorophosphate (Iod) for radical photopolymerization of acrylic resin monomers. At the photoinitiator concentration of 0.5 wt%, under irradiation with LED@365 nm at the power of 20 mW cm - 2 , the double bond conversion of monomer initiated by DXD, DTD were 63%, 64%, respectively, showing more excellent photoinitiation activities in comparison with that of the commercial photoinitiator (2-isopropylthioxine, ITX) of 52%. DTD and DXD even achieved 75% and 71% conversion rates at lower power (10mW cm -2 ), respectively. Moreover, DXD (7%) and DTD (8%) exhibited rather lower mobility than ITX (37%) in light-curable films. Remarkably, triplet states were revealed to have an important effect on photopolymerization. The relevant mechanisms were scientifically understood by means of steady-state photolysis, fluorescence quenching, laser flash photolysis and electron spin resonance spin trapping technologies.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"155 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283593","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

Tetraphenylethylene-appended poly(ethylene-alt-maleic anhydride) derivatives: functional group-dependent stimuli-responsive fluorescence 四苯乙烯附加聚（乙烯-马来酸酐）衍生物：官能团依赖的刺激响应荧光

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-09 DOI: 10.1039/d5py00657k

Ranran Gao, Qu Wang, Qian Li, Chenchi Hua, Xiaoning Guo, Li Wang, Wantai Yang

引用次数: 0

Reactive Oxygen Species Sensitive Thioether-Bearing Poly(2-oxazoline)s: Direct and Controlled Polymerization using Initiator Salt. 活性氧敏感型含硫醚聚（2-恶唑啉）：引发剂盐直接控制聚合。

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-09 DOI: 10.1039/d5py00659g

Saba Nemati Mahand, Anna-Lena Ziegler, Parsa Amin, Florian T. Kaps, Robert Luxenhofer

{"title":"Reactive Oxygen Species Sensitive Thioether-Bearing Poly(2-oxazoline)s: Direct and Controlled Polymerization using Initiator Salt.","authors":"Saba Nemati Mahand, Anna-Lena Ziegler, Parsa Amin, Florian T. Kaps, Robert Luxenhofer","doi":"10.1039/d5py00659g","DOIUrl":"https://doi.org/10.1039/d5py00659g","url":null,"abstract":"Reactive oxygen species (ROS)-responsive polymers have attracted significant attention for their potential in biomedical applications, particularly in drug delivery and tissue engineering. This study presents the first direct synthesis and characterization of ROS-responsive thioether-bearing poly(2-oxazoline)s (POx) via controlled cationic ring-opening polymerization (CROP). While typical initiators lead to loss of control over the CROP of 2-(methylthio)-methyl-2-oxazoline, its controlled polymerization was possible via the initiator salt method. The living character was confirmed by kinetic experiments and chain extension, used to synthesize amphiphilic block copolymers. The ROS-responsiveness of the synthesized polymers was evaluated through in vitro studies in the presence of hydrogen peroxide. The amphiphilic self-assemblies disassemble over time, as demonstrated for a triblock copolymer, suggesting a significant change of hydrophilicity of the polymer upon exposure to ROS. Together, the presented synthetic approach has much better atom economy over a previously published approach and enables easy access to ROS-responsive POx with complex architectures.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"24 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247323","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

Photocontrolled cationic polymerization of fluorinated vinyl ethers 氟化乙烯醚的光控阳离子聚合

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-09 DOI: 10.1039/d5py00648a

Jianxu Chen, Xun Zhang, Zan Yang, Yu Jiang, Saihu Liao

引用次数: 0

The effect of 1,2-dipieridinoethane derivatives on the composition and hydride sequence distribution in LAP of styrene and isoprene 1,2-二吡啶乙烷衍生物对苯乙烯和异戊二烯在LAP中的组成和氢化物序列分布的影响

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-09 DOI: 10.1039/d5py00352k

Yang Yang, Qiqi Dai, Yao Long, Yujie Wang, Zhifang Chen, Yi Yang, Le Zhou, Yi Xiao, Xinyu Han, Jiexun Zhang, Shihan Ding, Kun Liu, Lijun Li

{"title":"The effect of 1,2-dipieridinoethane derivatives on the composition and hydride sequence distribution in LAP of styrene and isoprene","authors":"Yang Yang, Qiqi Dai, Yao Long, Yujie Wang, Zhifang Chen, Yi Yang, Le Zhou, Yi Xiao, Xinyu Han, Jiexun Zhang, Shihan Ding, Kun Liu, Lijun Li","doi":"10.1039/d5py00352k","DOIUrl":"https://doi.org/10.1039/d5py00352k","url":null,"abstract":"Precise control of monomer sequences is of significant importance for the functional modification of polyolefins. For styrene/isoprene (ST/IP) random/alternating copolymers with the constant composition FST=0.5, the content variations of isomeric 1,3-diene units in alternating sequences (ST-alt-1,4-IP, ST-alt-3,4-IP and ST-alt-1,2-IP) significantly influence the properties of polyolefins. In this paper, a sterically hindered active center was constructed using 1,2-dipiperidinoethane(DPE)-derived polar additives and n-Butyllithium. The regulatory effects of these novel structure regulators on copolymer composition distributions and isomeric units sequence distributions were systematically characterized by 1H NMR spectroscopy, and the microstructure information was further verified by FTIR, DSC analysis. GPC analysis confirmed the living and controllable nature of copolymerization. Finally, the thermal performance differences of random copolymers with various hybrid sequence distributions were systematically investigated by DSC. These research results advance the understanding of sequence regulation polymerization mechanisms and provide a novel strategy for the controlled preparation of liquid rubber.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"83 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247380","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

Bimetallic aluminum complexes bearing β-pyridyl-enamino ligands: synthesis, characterization and their applications in the ring-opening polymerization of ε-caprolactone 含β-吡啶氨基配体的双金属铝配合物：合成、表征及其在ε-己内酯开环聚合中的应用

IF 4.6 2区化学

Polymer Chemistry Pub Date : 2025-10-09 DOI: 10.1039/d5py00481k

Peng Wang, Ziyao Su, Zeqian Yang, Jianhua Cheng, Hengquan Yang, Israel M. Kibeye, Xia Chen

{"title":"Bimetallic aluminum complexes bearing β-pyridyl-enamino ligands: synthesis, characterization and their applications in the ring-opening polymerization of ε-caprolactone","authors":"Peng Wang, Ziyao Su, Zeqian Yang, Jianhua Cheng, Hengquan Yang, Israel M. Kibeye, Xia Chen","doi":"10.1039/d5py00481k","DOIUrl":"https://doi.org/10.1039/d5py00481k","url":null,"abstract":"A series of bridged β-pyridyl-enamino dinuclear aluminum complexes 1–6 have been prepared in high yields, where complexes 1, 2, 3, 5 and 6 were characterized by single-crystal X-ray diffraction. The distance between two Al centers in 1–3 was in the range of 3.7 to 5.8 Å, which is far shorter than that in 5 and 6 (about 8.0 Å). All of these aluminum complexes were used as initiators for the ring-opening polymerization of ε-caprolactone in the presence of benzyl alcohol. Complexes 1–3 exhibited higher catalytic activity compared to complexes 4–6 under the same conditions, indicating that the distance between the Al atoms affects the catalytic activity. Complexes 3 and 5 with Al-Me groups exhibit higher catalytic activity than complexes 4 and 6 with Al-Et groups. This is likely due to the larger steric hindrance or the electron-donating group weakens the Lewis acidity of aluminum, which results in a reduced reaction rate between the complexes and benzyl alcohol. Herein, there are two factors affecting the polymerization activity in the ROP of ε-caprolactone: one is the distance between the two Al centers in bimetallic systems; the other is the alkyl groups on the Al atoms. The MALDI-TOF mass spectrum of the polymers revealed that the ring-opening polymerization of ε-caprolactone catalyzed by these catalysts yields linear polycaprolactones with controlled molecular weights, narrow distributions and end group fidelity.","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"1 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247324","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