Journal of Polymer Science最新文献_第10页

Anthraquinones as organophotoredox catalysts for atom transfer radical polymerization via sequential absorption of visible light 通过顺序吸收可见光实现原子转移自由基聚合的蒽醌类有机光氧化催化剂

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-07-04 DOI: 10.1002/pol.20240155

Jianmin Fu, Xiaoxia Liu, Zichen Wu, Donglei Wei, Hou Chen, Liangjiu Bai, Wenxiang Wang, Huawei Yang, Lixia Yang

引用次数: 0

Thermal curing of epoxy resins at lower temperature using 4-(methylamino)pyridine derivatives as novel thermal latent curing agents 使用 4-(甲基氨基)吡啶衍生物作为新型热潜伏固化剂在较低温度下对环氧树脂进行热固化

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-07-04 DOI: 10.1002/pol.20240379

Daisuke Aoki, Shigemasa Dogoshi, Yukai Ito, Koji Arimitsu

{"title":"Thermal curing of epoxy resins at lower temperature using 4-(methylamino)pyridine derivatives as novel thermal latent curing agents","authors":"Daisuke Aoki, Shigemasa Dogoshi, Yukai Ito, Koji Arimitsu","doi":"10.1002/pol.20240379","DOIUrl":"10.1002/pol.20240379","url":null,"abstract":"To expand the application fields of epoxy resins, there has been a growing demand for thermal latent curing agents that combine a lower curing temperature with a long storage lifetime for a one-component epoxy formulation. Herein, we present the use of novel thermal latent curing agents for epoxy resins that are effective at lower curing temperatures compared to epoxy resins containing imidazoles as curing agents—they are based on 4-(methylamino)pyridine (4MAPy), with reactivity suppressed by different amide protecting groups. We revealed reaction mechanism of epoxy polymerization by the thermal latent 4MAPy, using Matrix-assisted laser desorption ionization–time-of-flight mass spectrometry, Fourier transform infrared spectroscopy (FT-IR), and 1H NMR analyses of the model polymerization of phenyl glycidyl ether. The amide protecting groups decomposed to form the highly reactive 4MAPy by nucleophilic acyl substitution with the propagating alkoxide. Furthermore, FT-IR data and pencil hardness tests revealed that thermal latent 4MAPy derivatives, particularly those with electron-rich pyridine rings, can cure epoxy resins at lower curing temperatures, notably 90°C. The thermal latent 4MAPy derivatives with epoxy resin exhibited a storage lifetime of at least 6 days at 3°C, in contrast to 4MAPy with epoxy resin that cured within a day after mixing.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 19","pages":"4406-4415"},"PeriodicalIF":3.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pol.20240379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of lemon peel extract as a natural additive in polyvinyl alcohol/chitosan blend for advanced bioactive food packaging 将柠檬皮提取物作为聚乙烯醇/壳聚糖混合物的天然添加剂用于高级生物活性食品包装的研究

IF 3.4 3区化学

Journal of Polymer Science Pub Date : 2024-07-04 DOI: 10.1002/pol.20240268

Oumaima Fakraoui, Leonard Ionut Atanase, Slim Salhi, Isabelle Royaud, Mourad Arous, Zoubir Ayadi

{"title":"Investigation of lemon peel extract as a natural additive in polyvinyl alcohol/chitosan blend for advanced bioactive food packaging","authors":"Oumaima Fakraoui, Leonard Ionut Atanase, Slim Salhi, Isabelle Royaud, Mourad Arous, Zoubir Ayadi","doi":"10.1002/pol.20240268","DOIUrl":"https://doi.org/10.1002/pol.20240268","url":null,"abstract":"Lemon peel (LP) was integrated into polyvinyl alcohol/chitosan (PVA/CS) to produce innovative active food packaging films via solvent‐casting method. PVA/CS/LP biocomposites were prepared with varying LP contents (1%, 3%, and 5% by weight) to investigate their impact on morphological, thermal, structural, biodegradability, solubility, mechanical, and bioactivity properties of the PVA/CS blend. Scanning electron microscope analysis revealed a uniform dispersion of LP within the matrix. Attenuated total reflectance ‐ fourier transform Infrared spectroscopy (ATR‐FTIR) study confirmed interaction between lemon peel and the matrix. The incorporation of LP enhanced thermal stability and enzymatic activity of PVA/CS films while reducing their UV–vis light transparency. Additionally, the biodegradability of the biocomposites increased, reaching 74% after 30 days of soil burial. Moisture content, water solubility, and swelling decreased with LP content, favoring food preservation. It can be asserted from the tensile test that blending PVA with CS enhances the Young's modulus by 17%. The incorporation of LP into the PVA/CS blend further enhanced the Young's modulus and tensile strength to 1322 and 193 MPa, respectively, attributed to the strong hydrogen bonding between the PVA/CS matrix and LP. Moreover, PVA/CS/LP biocomposites effectively reduced weight loss in cherry tomatoes and inhibited microbial growth, suggesting their potential as eco‐friendly bioactive packaging materials for food preservation.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"24 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549732","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

Optically transparent and refractive thiol-ene polymers containing cyclotriphosphazenes 含环三磷酸烯的具有光学透明性和折射性的硫醇烯聚合物

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-07-01 DOI: 10.1002/pol.20240386

Jeong-Un Jin, Miyeon Lee, Nam-Ho You

{"title":"Optically transparent and refractive thiol-ene polymers containing cyclotriphosphazenes","authors":"Jeong-Un Jin, Miyeon Lee, Nam-Ho You","doi":"10.1002/pol.20240386","DOIUrl":"10.1002/pol.20240386","url":null,"abstract":"A colorless, transparent thiol-ene polymer network was developed that contains cyclic phosphazene units in the polymer chain. Hexakis (allyloxy) cyclotriphosphazene (HAP) was synthesized from the nucleophilic substitution reaction of phosphonitrilic chloride trimer and allyl alcohol. Thiol-ene polymers (HAP-SH) were successfully prepared without by-products or the use of solvents through photopolymerization of the HAP and multithiol monomers with various functional group and flexible structures (e.g., 1,4-butanedithiol (BDTH), 1,3,5-benzenetrithiol (BTTH), trimethylolpropane tris (3-mercaptopropionate) (TTMP) and pentaerythritol tetrakis (3-mercaptopropionate) (PTTH)). The prepared HAP-SH polymers showed sufficient thermal stability due to the high degree of cross-linking. In addition, the HAP-SH polymer films exhibited high optical transparency of over 90% in the visible region. The refractive indices of the HAP-SH polymers measured at 637 nm were in the range of 1.5530–1.6344, and the Abbe number was calculated to be in the range of 34.5–47.1. These results are attributed to the structure of the cyclophosphazine and the polymer main chain containing aliphatic linkers with sulfur atoms. Another significant result was the transparency of the HAP-SH polymer films in the mid-infrared (MWIR) region. The thermal stability and excellent optical properties of the HAP-SH polymers make them good candidates for application as a protective film for IR lenses, which are easily damaged by external factors.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 19","pages":"4397-4405"},"PeriodicalIF":3.9,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524948","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 13 封面图片，第 62 卷第 13 期

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-07-01 DOI: 10.1002/pola.31214

引用次数: 0

Selective electrochemical degradation of bottlebrush elastomers 瓶刷弹性体的选择性电化学降解

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-07-01 DOI: 10.1002/pol.20240393

Kaitlin R. Albanese, Parker T. Morris, Brian Roehrich, Javier Read de Alaniz, Craig J. Hawker, Christopher M. Bates

{"title":"Selective electrochemical degradation of bottlebrush elastomers","authors":"Kaitlin R. Albanese, Parker T. Morris, Brian Roehrich, Javier Read de Alaniz, Craig J. Hawker, Christopher M. Bates","doi":"10.1002/pol.20240393","DOIUrl":"10.1002/pol.20240393","url":null,"abstract":"<div>\u0000 \u0000 We introduce a simple synthetic strategy to selectively degrade bottlebrush networks derived from well-defined poly(4-methylcaprolactone) (P4MCL) bottlebrush polymers. Functionalization of the hydroxyl groups present at the terminal ends of P4MCL side chains with α-lipoic acid resulted in bottlebrush polymers having a range of molecular weights (Mn = 45–2200 kg mol−1) and a tunable number of reactive dithiolane chain ends. These functionalized chain ends act as efficient crosslinkers due to radical ring-opening of the dithiolane rings under UV light. The resulting redox-active disulfide crosslinks enable mild electrochemical or chemical degradation of the SS crosslinks to regenerate the starting bottlebrush polymer. P4MCL side chains and the disulfides can be degraded simultaneously using harsher reducing conditions. This combination of bottlebrush architecture with facile disulfide crosslinking presents a versatile platform for preparing highly tunable elastomers that undergo controlled degradation under mild conditions.\u0000 </div>","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 18","pages":"4326-4331"},"PeriodicalIF":3.9,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141505193","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

Determining sulfur speciation in oxidatively crosslinked degradable polymers using sulfur K-edge X-ray absorption spectroscopy 利用硫 K 边 X 射线吸收光谱测定氧化交联可降解聚合物中的硫标度

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-06-28 DOI: 10.1002/pol.20240367

Melissa A. Smith, U. L. D. Inush Kalana, George E. Sterbinsky, Tianpin Wu, Matthew K. Kiesewetter, Dugan Hayes

{"title":"Determining sulfur speciation in oxidatively crosslinked degradable polymers using sulfur K-edge X-ray absorption spectroscopy","authors":"Melissa A. Smith, U. L. D. Inush Kalana, George E. Sterbinsky, Tianpin Wu, Matthew K. Kiesewetter, Dugan Hayes","doi":"10.1002/pol.20240367","DOIUrl":"10.1002/pol.20240367","url":null,"abstract":"A new family of water-degradable elastic polymers prepared by oxidative crosslinking of the parent polythionolactones shows promise in a broad range of applications, but the compositions of these materials elude conventional analytical methods. Here we use sulfur K-edge X-ray absorption spectroscopy to quantify the amounts of thioether, disulfide, sulfone, sulfate ester, and thionoester in each polymer and to rule out the presence of several other functional groups, including sulfonate, thiosulfonate, sulfate, and sulfoxide. We rationalize this speciation as a function of linker flexibility in the context of sulfinyl cycloaddition reactions and propose a mechanism of aggregation for the oxidized polymers. Our results correlate with swelling ratios but not with porosity nor crosslink density measurements, demonstrating the importance of pairing mechanical and chemical techniques when characterizing heterogeneous organic polymers. Finally, we take advantage of the proximity of the gold M4,5-edges to the sulfur K-edge to analyze the binding and reactivity of Au(III) with the crosslinked polymers.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 18","pages":"4315-4325"},"PeriodicalIF":3.9,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141505194","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

Development of a bio-based self-healing waterborne polyurethane with dynamic phenol-carbamate network for enhanced antimicrobial and antiseptic performance 开发具有动态苯酚-氨基甲酸酯网络的生物基自愈合水性聚氨酯，提高抗菌防腐性能

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-06-27 DOI: 10.1002/pol.20240310

Yuan Wang, Zaixi Yu, Pingbo Zhang, Yunting Wang, Zhan Chang, Pingping Jiang, Jialiang Xia, Xuewen Gao, Yanmin Bao

{"title":"Development of a bio-based self-healing waterborne polyurethane with dynamic phenol-carbamate network for enhanced antimicrobial and antiseptic performance","authors":"Yuan Wang, Zaixi Yu, Pingbo Zhang, Yunting Wang, Zhan Chang, Pingping Jiang, Jialiang Xia, Xuewen Gao, Yanmin Bao","doi":"10.1002/pol.20240310","DOIUrl":"10.1002/pol.20240310","url":null,"abstract":"One of the major challenges in expanding the uses of polymer materials is the development of thermally driven, multifunctional, self-healing water polyurethanes with superior mechanical properties. By adding nano-inorganic fillers and incorporating phenol-carbamate bonds into the molecular chains, a self-healing waterborne polyurethane with strong mechanical properties as well as antibacterial, and antiseptic properties was created. Given that tannic acid (TA) can create an isocyanate-group-containing phenol-carbamate network, the resulting TA-based water polyurethane (TWPU) had great mechanical properties and superior thermal stability with tensile strength of 31.9 MPa and elongation at break of 1406.4%. The amount of dynamic phenol-urethane linkages in the polyurethane backbone can also be adjusted and controlled to achieve excellent self-healing efficiency. The coating's anti-corrosion properties were good when the waterborne polyurethane was added to ZnO modified GO. Furthermore, the coating exhibited strong antibacterial capabilities due to the incorporation of nano-zinc oxide. In this study, we create an environmentally friendly waterborne polyurethane that is antibacterial, antiseptic, and self-healing using a straightforward and efficient design approach.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 18","pages":"4277-4288"},"PeriodicalIF":3.9,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524949","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

Synchronous improvement in mechanical properties and dielectric performance of poly(silylene arylether arylacetylene) by introducing trifluoromethyl groups 通过引入三氟甲基，同步改善聚（硅烷基芳基醚芳基乙炔）的机械性能和介电性能

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-06-27 DOI: 10.1002/pol.20240382

Changjun Gong, Shuaikang Lv, Shuyue Liu, Qiaolong Yuan, Junkun Tang, Farong Huang

{"title":"Synchronous improvement in mechanical properties and dielectric performance of poly(silylene arylether arylacetylene) by introducing trifluoromethyl groups","authors":"Changjun Gong, Shuaikang Lv, Shuyue Liu, Qiaolong Yuan, Junkun Tang, Farong Huang","doi":"10.1002/pol.20240382","DOIUrl":"10.1002/pol.20240382","url":null,"abstract":"Poly(silylene arylether arylacetylene) (PSEA) resin is a promising material for preparing an advanced wave-transparent composite because of excellent thermal stability and good dielectric properties. Herein, a novel poly(silylene arylether arylacetylene) resin with trifluoromethyl groups (PSEAF) was synthesized by Grignard coupling reaction, and the effects of the incorporation of trifluoromethyl groups on various properties of PSEAF resin and quartz fiber reinforced composites were investigated. Compared to PSEA, the PSEAF resin exhibits better solubility and processability, and lower apparent activation energy for curing reactions. After thermal curing reactions, the PSEAF resin converts to an amorphous crosslinked network with the temperature at 5% weight loss (Td5) around 470 °C. The cured PSEAF resin possesses improved mechanical properties and dielectric properties. The flexural strength arrives at 64.4 MPa, and the dielectric constant (ε) and dielectric loss (tanδ) at 30 MHz are 2.75 and 4.3 × 10−3, respectively. Besides, the quartz fiber reinforced PSEAF composite simultaneously shows ε of 3.3, theoretical wave transmittance |T|2 of 91.4% at 7 GHz, and flexural strength of 350 MPa.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 18","pages":"4289-4301"},"PeriodicalIF":3.9,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524950","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

Congo red removal from aqueous solution via biosorption onto Trametes trogii-loaded poly(hydroxyethyl methacrylate) cryogel 通过蛙曲霉负载聚（甲基丙烯酸羟乙酯）低温凝胶的生物吸附作用去除水溶液中的刚果红

IF 3.9 3区化学

Journal of Polymer Science Pub Date : 2024-06-27 DOI: 10.1002/pol.20240107

Aslı Göçenoğlu Sarıkaya, Emre Erden Kopar, Bilgen Osman

{"title":"Congo red removal from aqueous solution via biosorption onto Trametes trogii-loaded poly(hydroxyethyl methacrylate) cryogel","authors":"Aslı Göçenoğlu Sarıkaya, Emre Erden Kopar, Bilgen Osman","doi":"10.1002/pol.20240107","DOIUrl":"10.1002/pol.20240107","url":null,"abstract":"In this study, Trametes trogii-loaded poly(2- hydroxyethyl methacrylate) cryogel (Tt-PHEMA) was prepared and used as a biosorbent to remove Congo Red (CR), from aqueous solutions. The biomass and Tt-PHEMA cryogel were characterized with scanning electron microscopy and Fourier Transform infrared spectroscopy. Macroporosity degree (%) and swelling ratio (%) of the Tt-PHEMA cryogel were determined as 78.3% and 61.04%, respectively. The effect of loaded biomass amount, pH, initial CR concentration, temperature, and contact time were investigated detailedly. The maximum biosorption capacity of Tt-PHEMA cryogel was 156.71 ± 1.22 mg g−1 at pH 6.0 at 45°C. Biosorption capacity was increased from 125.92 ± 1.524 mg g−1 to 156.71 ± 1.22 mg g−1 with increasing temperature from 25 to 45°C, demonstrating that the biosorption process was endothermic. The biosorption data were well fitted to the Freundlich isotherm and pseudo-second-order kinetic models. The negative Gibbs free energy change values showed favorable biosorption. The Tt-PHEMA cryogel was easily regenerated with ethanol and used repeatedly five times without a significant change in the biosorption capacity. As a result, Trametes trogii-loaded PHEMA cryogel has an application potential for CR removal from wastewater, taking advantage of interconnected macroporous structure cryogels.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 18","pages":"4302-4314"},"PeriodicalIF":3.9,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pol.20240107","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0