Journal of Polymer Science最新文献_第2页

N-heterocyclic carbene copper complexes catalyze the C1 polymerization of substituted diazomethanes N-杂环碳烯铜络合物催化取代的重氮甲烷的 C1 聚合作用

IF 3.4 3区化学

Journal of Polymer Science Pub Date : 2024-09-18 DOI: 10.1002/pol.20240591

Songsu Kang, Sherilyn J. Lu, Minyeong Cho, Youngsang Cho, Prakash R. Sultane, Christopher W. Bielawski

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Rational design of a room‐temperature curing method, based on the epoxy–thiol click reaction, for UV‐curable hard coatings with ultrahigh strength and adhesion 基于环氧-硫醇点击反应的室温固化方法的合理设计，用于具有超高强度和附着力的紫外线固化硬质涂层

IF 3.4 3区化学

Journal of Polymer Science Pub Date : 2024-09-17 DOI: 10.1002/pol.20240661

Yuya Tanaka, Nanae Tanaka, Daisuke Aoki, Koji Arimitsu

{"title":"Rational design of a room‐temperature curing method, based on the epoxy–thiol click reaction, for UV‐curable hard coatings with ultrahigh strength and adhesion","authors":"Yuya Tanaka, Nanae Tanaka, Daisuke Aoki, Koji Arimitsu","doi":"10.1002/pol.20240661","DOIUrl":"https://doi.org/10.1002/pol.20240661","url":null,"abstract":"In recent years, there has been a growing demand for UV‐curable hard coatings because they offer several advantages, for example, lower energy consumption and the absence of volatile organic compound emissions. Anionic UV curing with photobase generators (PBGs), such as epoxy–thiol cross‐linking, enables curing under ambient conditions. However, designing a room‐temperature photoanionic curing system for epoxy–thiols remains challenging due to the complex effects of resin combinations on the cured products, thus making it difficult to prepare films with high hardness. Herein, we present a controlled reaction design for an anionic UV‐curing system by combining the chemical structures of epoxy resins and multifunctional thiols. The anionic UV‐curing system using PBGs that generate organic superbases demonstrated UV‐delayed curability, as evidenced by FT‐IR and photorheological analyses. To achieve high hardness, it was necessary to create the thiols with ultrarigid structures; epoxy resins with a bisphenol F structure were optimal for reacting with thiols for ultrarigid structures. This combination afforded an indentation hardness of 262 MPa with an epoxy conversion rate of 77% even at room temperature.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"212 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261884","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

Exploring the reactivity and interactions of a poly(fluorene‐co‐tetrazine)‐conjugated polymer with Single‐walled Carbon Nanotubes 探索聚（芴-四嗪）共轭聚合物与单壁碳纳米管的反应性和相互作用

IF 3.4 3区化学

Journal of Polymer Science Pub Date : 2024-09-17 DOI: 10.1002/pol.20240593

Alexandra L. Ly, Alex Adronov

{"title":"Exploring the reactivity and interactions of a poly(fluorene‐co‐tetrazine)‐conjugated polymer with Single‐walled Carbon Nanotubes","authors":"Alexandra L. Ly, Alex Adronov","doi":"10.1002/pol.20240593","DOIUrl":"https://doi.org/10.1002/pol.20240593","url":null,"abstract":"Conjugated tetrazine‐containing polymers that undergo inverse electron demand Diels‐Alder (IEDDA) reactions with trans‐cyclooctenes are interesting not only for their intrinsic optoelectronic properties, but also their interactions with π‐conjugated surfaces. Here, we prepared a series of poly(fluorene‐co‐tetrazine) polymers and carried out IEDDA reactions to decorate them with hydroxyl, hexadecyl, or triethylene glycol side chains. The polymers were investigated pre‐ and post‐IEDDA coupling in terms of their ability to disperse single‐walled carbon nanotubes (SWNTs) in organic solvent. It was found that polymer molecular weight, side chain structure, and degree of conjugation all impacted the quality of SWNT dispersions. While the starting poly(fluorene‐co‐tetrazine) polymer produced concentrated dispersions, the post‐IEDDA polymer containing dihydropyridazine groups did not produce dispersions of equal concentration. However, upon oxidation to the fully aromatic pyridazines, the polymers regained their ability to form concentrated dispersions. Furthermore, the post‐IEDDA polymers exhibited increased selectivity toward metallic SWNTs relative to the starting polymer. Due to the efficiency of the IEDDA reaction, it was also possible to use this chemistry to derivatize the nanotube complex with poly(fluorene‐co‐tetrazine) post‐dispersion. Overall, this work demonstrates the first use of reactive polytetrazines to disperse SWNTs, allowing rapid modification of polymer‐nanotube complexes.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"21 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261876","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

Cover Image, Volume 62, Issue 18 封面图片，第 62 卷第 18 期

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-09-15 DOI: 10.1002/pola.31317

引用次数: 0

Enhanced properties of polyethylene through in situ polymerization with siloxene‐supported vanadium‐based catalysts 利用硅氧烷支撑的钒基催化剂原位聚合提高聚乙烯的性能

IF 3.4 3区化学

Journal of Polymer Science Pub Date : 2024-09-13 DOI: 10.1002/pol.20240334

Xin Yan, Yuying Zhou, Hao Wu, Chen Liu, Chenghan Huang, Weiwei He, Liang Fang, Hexin Zhang, Jianming Yang, KeunByoung Yoon

{"title":"Enhanced properties of polyethylene through in situ polymerization with siloxene‐supported vanadium‐based catalysts","authors":"Xin Yan, Yuying Zhou, Hao Wu, Chen Liu, Chenghan Huang, Weiwei He, Liang Fang, Hexin Zhang, Jianming Yang, KeunByoung Yoon","doi":"10.1002/pol.20240334","DOIUrl":"https://doi.org/10.1002/pol.20240334","url":null,"abstract":"Two‐dimensional (2D) inorganic fillers can significantly improve the properties of polyolefins and broaden their application areas. In this study, high‐performance polyethylene (PE)/siloxene nanocomposites were prepared by in situ polymerization using layered siloxene‐supported vanadium (V)‐based catalysts. The siloxene‐supported V‐based catalysts have highly dispersed active sites and excellent catalytic performance for ethylene polymerization compared to VOCl3 catalysts. The catalytic activity of the siloxene‐supported V‐based catalysts for the polymerization of ethylene was significantly better than that of the VOCl3 catalysts at the same catalyst feed. During in situ polymerization, the layered siloxene fillers exhibited uniform dispersion in the PE matrix. Moreover, the addition of a very small amount (1.12 wt%) of siloxene filler significantly improved the thermal stability and mechanical performance of PE. Therefore, this study presents an effective method to fabricate PE with excellent properties.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"74 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261879","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

Synthesis and properties of a sustainable, vanillin-based phthalonitrile resin 一种以香兰素为基础的可持续邻苯二腈树脂的合成及其特性

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-09-13 DOI: 10.1002/pol.20240187

Matthew Laskoski, Loren C. Brown, Andrew T. Kerr

引用次数: 0

Photoactive hyperbranched poly(azo-ester) urethanes as fluorescent staining agent for plant cells 作为植物细胞荧光染色剂的光活性超支化聚（偶氮酯）氨基甲酸酯

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-09-13 DOI: 10.1002/pol.20240496

Arumugam Gopalakrishnan, Manivannan Nandhagopal, Mathivanan Narayanasamy, Chickiyan Sivakumar, Mahalingam Vanjinathan, A. Sultan Nasar

{"title":"Photoactive hyperbranched poly(azo-ester) urethanes as fluorescent staining agent for plant cells","authors":"Arumugam Gopalakrishnan, Manivannan Nandhagopal, Mathivanan Narayanasamy, Chickiyan Sivakumar, Mahalingam Vanjinathan, A. Sultan Nasar","doi":"10.1002/pol.20240496","DOIUrl":"10.1002/pol.20240496","url":null,"abstract":"A new AB2-type blocked isocyanate monomer containing azo-ester linkages and N,N′-diethanol amine groups was successfully synthesized. Deblocking of this monomer in DMF resulted corresponding hyperbranched poly(azo-ester)urethanes (HBPAEUs). These polymers were characterized by UV–visible spectroscopy, GPC, TGA, and DSC methods. The molecular weights (Mw) of the polymers were in the range of 5500–25,500 g/mol. The effect of reaction temperature on Mw was found significant. The polymers were found thermally stable up to 240 °C and showed Tg between 150 and 153 °C. These polymers absorbed UV light at 407 nm in THF solvent and also exhibited high absorption coefficients. The photo induced trans to cis isomerization of HBPAEU in THF was also studied and found λmax of cis form of the polymer was shifted to 526 nm, which suggested that the stability of this isomer was good. And, the polymer showed aggregation induced enhanced emission. In addition, the monomer and HBPAEU were found to exhibit maximal antibacterial activity against various Gram-positive and Gram-negative bacteria. In-vitro bio-imaging studies of this monomer and polymer were carried out in onion epidermal and fungal cells and the results revealed that the polymer was more efficient for staining and imaging plant cells.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 23","pages":"5467-5480"},"PeriodicalIF":3.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261880","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

RAFT polymerization of 2-hydroxyethyl vinyl ether and dimethyl maleate 2- 羟乙基乙烯基醚和马来酸二甲酯的 RAFT 聚合反应

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-09-10 DOI: 10.1002/pol.20240534

Jingwen Yao, Jiaying Tong, Dan Zhao, Dong Chen, Yuhong Ma, Wantai Yang

{"title":"RAFT polymerization of 2-hydroxyethyl vinyl ether and dimethyl maleate","authors":"Jingwen Yao, Jiaying Tong, Dan Zhao, Dong Chen, Yuhong Ma, Wantai Yang","doi":"10.1002/pol.20240534","DOIUrl":"10.1002/pol.20240534","url":null,"abstract":"The reversible addition-fragment chain transfer (RAFT) alternating copolymerization of 2-hydroxyethyl vinyl ether (HEVE) and dimethyl maleate (DMM) is achieved with S-(cyanomethyl) O-ethyl carbonodithioate (CMX) as medaitor and 2,2′-azobis(2-methylpropionitrile) (AIBN) as radical initiator. The effects of monomer concentrations, comonomer feeding ratios, molar ratio of monomer to CMX and solvent on the copolymerization and copolymer structure are systematically investigated. The living feature of the HEVE and DMM copolymerization is demonstrated by the linear increasement of the molecular weights with the monomer conversions, and relatively narrow molecular weight distributions of the copolymers. With dimethyl carbonate as solvent, poly(HEVE-alt-DMM) with Mn = 5200 and Mw/Mn = 1.34 are synthesized at [HEVE]/[DMM]/[CMX]/[AIBN] = 100/100/3/1. The alternating structure of the copolymer is demonstrated by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and proton nuclear magnetic resonance spectroscopy (1H NMR). The both α, ω-end groups are mainly originated from the moiety of CMX. To further demonstrate the living feature of the alternating copolymerization, chain extension and block copolymerization are also carried out. With poly(HEVE-alt-DMM) as macro-CTA (Mn = 5200, Mw/Mn = 1.34), the chain-extension reaction has been successfully realized (Mn = 9600, Mw/Mn = 1.70), and the block copolymer with vinyl neonanoate as monomer also successfully synthesized (Mn = 9800, Mw/Mn = 1.42).","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 23","pages":"5448-5458"},"PeriodicalIF":3.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177486","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

High-strength antifreezing flexible conductive polyvinyl alcohol hydrogel sensors co-reinforced with silk porous mesh fabric and silk nanofibers 与丝多孔网织物和丝纳米纤维共同增强的高强度抗冻柔性导电聚乙烯醇水凝胶传感器

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-09-10 DOI: 10.1002/pol.20240494

Chengyao Zhuge, Yaping Wang, Qian Qian, Shunyang Li, Wangyang Lu, Nan Li

{"title":"High-strength antifreezing flexible conductive polyvinyl alcohol hydrogel sensors co-reinforced with silk porous mesh fabric and silk nanofibers","authors":"Chengyao Zhuge, Yaping Wang, Qian Qian, Shunyang Li, Wangyang Lu, Nan Li","doi":"10.1002/pol.20240494","DOIUrl":"10.1002/pol.20240494","url":null,"abstract":"Hydrogel-based flexible strain sensors have an enormous potential for applications in wearable electronics, but currently, realizing excellent mechanical properties and electrical conductivity of sensors is difficult. In this work, polyvinyl alcohol (PVA) hydrogels were augmented with positively charged silk nanofibers (PCSNF) and PEDOT:PSS, and the resultant PVA-PEDOT:PSS-PCSNF hydrogel fabric showed remarkable mechanical properties (4.38 MPa) and elevated electrical conductivity. The presence of ethylene glycol (EG) in the hydrogel fabric imparts antifreezing properties and sustains electrical conductivity even at frigid temperatures (−18°C). In addition, EG contributes to the improvement of the electrical conductivity of PEDOT:PSS. This PVA-PEDOT:PSS-PCSNF hydrogel fabric can be used as a precise and reliable strain sensor for detecting diverse human motions and facial expressions. Significantly, the PVA-PEDOT:PSS-PCSNF hydrogel fabric strain sensor exhibits a gauge factor of 1.02 and exceptional durability, withstanding 400 elbow bends. This study introduces an innovative method for creating high-performance and resilient hydrogel-based flexible sensors.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 23","pages":"5434-5447"},"PeriodicalIF":3.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177485","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

Effects of graphene oxide and silane-grafted graphene oxide on chitosan packaging nanocomposite films for bread preservation 氧化石墨烯和硅烷接枝氧化石墨烯对用于面包保鲜的壳聚糖包装纳米复合膜的影响

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-09-09 DOI: 10.1002/pol.20240573

Ş. Melda Eskitoros-Togay

{"title":"Effects of graphene oxide and silane-grafted graphene oxide on chitosan packaging nanocomposite films for bread preservation","authors":"Ş. Melda Eskitoros-Togay","doi":"10.1002/pol.20240573","DOIUrl":"10.1002/pol.20240573","url":null,"abstract":"This study aims to investigate the dual effects of (3-aminopropyl)triethoxysilane (APTES)-grafted-GO (A-g-GO), and titanium dioxide (TiO2) on the novel chitosan (CS) packaging nanocomposite films developed via the solution-casting method. The chemical properties of GO and A-g-GO were assessed using FTIR and XRD. Subsequently, the chemical, structural, and physical attributes of all chitosan packaging nanocomposite films were analyzed through FTIR, XRD, TGA, DSC, AFM, water contact angle analysis, and food packaging tests. Successful silanization of GO by APTES was first confirmed. The highest surface roughness value was observed in the CS/A-g-GO/TiO2 film (16.574 nm) compared to pristine CS and other nanocomposite films. Incorporating GO into the CS matrix improved its thermal stability, suggesting robust bonding between GO and the polymer matrix. The addition of A-g-GO slightly decreased the contact angle value (107.7° for CS/A-g-GO), whereas TiO2 increased contact angles (117.3° for CS/GO/TiO2 and 119.4° for CS/A-g-GO/TiO2), suggesting a more hydrophilic structure with GO and A-g-GO and a more hydrophobic structure with TiO2. Bread samples showed no structural distortion over 40 days. Therefore, the dual impacts of A-g-GO and TiO2 on the pristine CS film imply that the resulting CS/A-g-GO/TiO2 film exhibits potential as an exceptionally efficient packaging material for prolonging the freshness of bread.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 23","pages":"5424-5433"},"PeriodicalIF":3.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177487","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