Polymer Science, Series A最新文献_第5页

Mechanical Properties of Poly(vinyl alcohol) Hydrogels: Role of Chemical Crosslinks and Physical Junctions 聚乙烯醇水凝胶的机械特性：化学交联和物理连接的作用

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-17 DOI: 10.1134/S0965545X24600571

A. S. Semkina, I. V. Bakeeva, N. M. Kuznetsov, A. E. Krupnin, T. E. Grigoriev, S. N. Chvalun

引用次数: 0

Environmentally Friendly Bioplastic Films Based on Avocado Seeds Starch and Nanocellulose Fibers 基于鳄梨籽淀粉和纳米纤维素纤维的环保生物塑料薄膜

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-17 DOI: 10.1134/S0965545X23600485

Nguyen Chi Thanh, Nguyen Bui Anh Duy, Ho Thi Hong Xuyen, Nguyen Thanh Huy, Bui Phuong Dong, Tong Quynh Giang

{"title":"Environmentally Friendly Bioplastic Films Based on Avocado Seeds Starch and Nanocellulose Fibers","authors":"Nguyen Chi Thanh, Nguyen Bui Anh Duy, Ho Thi Hong Xuyen, Nguyen Thanh Huy, Bui Phuong Dong, Tong Quynh Giang","doi":"10.1134/S0965545X23600485","DOIUrl":"10.1134/S0965545X23600485","url":null,"abstract":"In recent years, plastic waste has been a major cause of environmental pollution, negatively affecting human health and the ecosystem. Therefore, the trend of using bioplastics to replace fossil-based plastics has been becoming important and popular. This study aimed to successfully prepare a starch-based bioplastic film. Starch was extracted from avocado seeds using wet soaking method. The mechanical properties of bioplastic film were enhanced by reinforcing with nanocellulose fibers (CNFs) with using glycerol as a plasticizer. The results from the Scanning Electron Microscopy (SEM) analysis showed that the surface of the bioplastic film was affected by the content of used CNFs. The micro size aggregations occurred when too much CNFs was added to the starch matrix. The Infrared spectroscopy (FTIR) results presented peaks at wavenumbers corresponding to vibrations of hydroxyl, methyl, carboxyl and ether groups, which were characteristic peaks for the chemical structure of starch and CNFs. The crystallinity of bioplastic films tends to increase when CNFs was added to the starch matrix. The mechanical properties analysis of bioplastic films showed that CNFs were dispersed well in bioplastic films leading to the enhanced mechanical properties of the films.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"66 3","pages":"376 - 386"},"PeriodicalIF":1.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141640105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Biocompatible Molecularly Imprinted Cryogel Matrices for Protein Recognition in Biological Samples 用于识别生物样本中蛋白质的生物相容性分子印迹冷凝胶基质

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-12 DOI: 10.1134/S0965545X24600479

M. S. Leonovich, V. A. Korzhikov-Vlakh, E. G. Korzhikova-Vlakh, I. A. Gur’yanov, O. N. Brevnov, T. B. Tennikova

引用次数: 0

Mechanical Properties of Aramid Fiber Reinforced Resin Mineral Composites for Machine Tool Beds 用于机床床身的芳纶纤维增强树脂矿物复合材料的机械性能

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-12 DOI: 10.1134/S0965545X23600400

Yunfang Long, Yi Zhang, He Zhao, Yuhan Xing, Jianhua Zhang

{"title":"Mechanical Properties of Aramid Fiber Reinforced Resin Mineral Composites for Machine Tool Beds","authors":"Yunfang Long, Yi Zhang, He Zhao, Yuhan Xing, Jianhua Zhang","doi":"10.1134/S0965545X23600400","DOIUrl":"10.1134/S0965545X23600400","url":null,"abstract":"Resin mineral composites (RMC) have attracted a great deal of attention in ultra-precision machining because of their excellent vibration-dampening properties; however, their poor mechanical properties limit their wide applications. Adding reinforcing fibers is an effective way to improve the mechanical properties of RMC. This paper systematically studies the effect of aramid fibers as reinforcing components on the mechanical and thermal expansion properties of RMC. Results show that the mechanical strength of RMC can be effectively improved by a suitable selection of surface treatment methods and parameters. The mechanical strength of RMC reached its maximum value when the ultrasonic power was 200 W and the treatment time was 6 min; the mechanical strength of RMC reached its maximum value when the concentration of phosphoric acid oxidation was 20 wt % and the treatment time was 2 h. This study investigates the effect of different surface treatments on aramid fibers on the mechanical properties of resin mineral composites, optimizes the aramid fiber surface treatment parameters, enhances the mechanical properties of resin mineral composites, and extends the applications of resin mineral composites in high-speed processing and ultra-precision processing.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"66 2","pages":"216 - 232"},"PeriodicalIF":1.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Peculiar Crystal Structure in Poly(ε-caprolactone) and Poly(ε-caprolactone)/Multi-Walled Carbon Nanotube Solvent-Cast Films 聚（ε-己内酯）和聚（ε-己内酯）/多壁碳纳米管溶剂铸造薄膜中的奇特晶体结构

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-12 DOI: 10.1134/S0965545X24600133

Chengwu Hua, Haijun Chen, Gang Deng, Chao Shen

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Effect of Chirality of Phenylalanine in a Copolymer with L-Lysine on the Self-Assembly and Properties of the Resulting Nanoparticles 苯丙氨酸与 L-赖氨酸共聚物中苯丙氨酸的手性对纳米粒子自组装和性能的影响

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-10 DOI: 10.1134/S0965545X24600194

E. G. Korzhikova-Vlakh, A. Yu. Dzhuzha, V. D. Matvienko, G. A. Platonova, T. B. Tennikova

引用次数: 0

Preparation and Characterization of PLLA-Based Microporous Membranes with High CO2/O2 Selective Permeability for Food Packaging 用于食品包装的具有高二氧化碳/氧气选择透过性的聚乳酸基微孔膜的制备与表征

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-10 DOI: 10.1134/S0965545X23600424

Linze Liu, Yang Yang, Tungalag Dong, Lijun Song, Xueyan Yun

{"title":"Preparation and Characterization of PLLA-Based Microporous Membranes with High CO2/O2 Selective Permeability for Food Packaging","authors":"Linze Liu, Yang Yang, Tungalag Dong, Lijun Song, Xueyan Yun","doi":"10.1134/S0965545X23600424","DOIUrl":"10.1134/S0965545X23600424","url":null,"abstract":"To maintain CO2/O2 permselectivity of poly(lactic acid) (PLLA) microporous films for better preservation of fresh produce, Polytrifluoropropylmethylsiloxane (PTFPMS) was introduced into PLLA to prepare PLLA-PTFPMS-PLLA (PLTL) block copolymer. And PLTL-n% microporous films were prepared using varying ratios of chloroform/acetone blended solvents as the film-casting solution in this study. PTFPMS filled a portion of the micropores of the PLTL-n% film. While the micropores enhanced the O2 and CO2 dioxide permeability of the PLLA microporous film, PTFPMS maintained the CO2/O2 selective permeability of the film. In comparison to PLLA films, the CO2 permeability of mixed solvents-treated PLTL-20% film increased from 1.99 × 10–8 to 10.08 × 10–8 cm3 m/m2 h Pa, O2 permeability increased from 0.70 × 10–8 to 2.02 × 10–8 cm3 m/m2 h Pa, and CO2/O2 permselectivity increased from 2.9 to 5.0 at 5°C. In addition, PLTL-n% microporous films also have good flexibility and UV shielding properties.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"66 1","pages":"136 - 147"},"PeriodicalIF":1.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141570308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Copolyaramide As a Barrier Material 作为阻隔材料的共聚酰胺

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-10 DOI: 10.1134/S0965545X24600364

A. Yu. Alentiev, R. Yu. Nikiforov, V. P. Shantarovich, N. A. Belov, T. K. Musina, I. V. Stroeva, S. I. Banduryan, N. G. Shishkina

{"title":"Copolyaramide As a Barrier Material","authors":"A. Yu. Alentiev, R. Yu. Nikiforov, V. P. Shantarovich, N. A. Belov, T. K. Musina, I. V. Stroeva, S. I. Banduryan, N. G. Shishkina","doi":"10.1134/S0965545X24600364","DOIUrl":"10.1134/S0965545X24600364","url":null,"abstract":"The films of heterocyclic copolyaramide used at NPO OOO “LIRSOT” for the production of high-strength polyaramide threads are obtained, their gas transport characteristics for helium, oxygen, and carbon dioxide are studied, and the parameters of free volume elements are investigated by positron annihilation lifetime spectroscopy. According to the data obtained, the copolyaramide under study belongs to the class of polymers with high barrier characteristics and its properties are close to those of the commercial samples of thermotropic liquid-crystalline copolyesters Vectra. The low values of gas permeability of copolyaramide are related to decreased gas diffusion coefficients. A comparison of the activation energies of permeability, diffusion, and sorption enthalpy of gases shows that these parameters are also comparable to those of barrier polymers. The gas permeability data are confirmed by positron annihilation lifetime spectroscopy: the sizes of free volume elements obtained for copolyaramide (R3 = 2.5 Å) are also comparable with those for copolyester Vectra (R3 = 2.1 Å). The results of this study demonstrate that the tested domestic heterocyclic copolyaramide can be used for the manufacture of barrier films and coatings as a substitute for Vectra liquid-crystalline copolyesters.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"66 1","pages":"69 - 75"},"PeriodicalIF":1.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141570312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Preparation of Dual-Network Conductive Hydrogels As Wearable Flexible Strain Sensors Using One-Pot Method and Soaking Strategy 采用一锅法和浸泡策略制备作为可穿戴柔性应变传感器的双网络导电水凝胶

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-10 DOI: 10.1134/S0965545X24600376

Lingling Meng, Da Liu, Shijie Ding, Weihao Li, En Liu

{"title":"Preparation of Dual-Network Conductive Hydrogels As Wearable Flexible Strain Sensors Using One-Pot Method and Soaking Strategy","authors":"Lingling Meng, Da Liu, Shijie Ding, Weihao Li, En Liu","doi":"10.1134/S0965545X24600376","DOIUrl":"10.1134/S0965545X24600376","url":null,"abstract":"Conductive hydrogel-based flexible strain sensors have gradually attracted the attention of scientific researchers in recent years. They are capable of converting invisible mechanical stimulus signals into visible electrical signals and have excellent biocompatibility and good electrical conductivity, which also provide the basis for the development of flexible electronic devices. Nowadays, conductive hydrogel, as the core component of flexible sensors, puts forward higher requirements for sensitivity, fast response, and cycle stability to adapt to human activity detection and health monitoring. In this paper, acrylamide (AM), cellulose nanocrystals (CNC), and sodium alginate (SA) were used as raw materials to prepare PAM/CNC/SA double network hydrogel by in situ free radical polymerization. Soaked in the CaCl2 solution, a PAM/CNC/SA-Ca2+ double-network conductive hydrogel is formed. The results show that the addition of CNC can significantly improve the mechanical properties of the hydrogel. In addition, the introduction of the Ca2+ ion has a certain positive effect on the conductivity of the hydrogel. At the same time, the conductive hydrogel has good strain sensitivity (gauge factor up to 16.63). Therefore, conductive hydrogels have potential application value and broad application prospects in the field of flexible sensors.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"66 1","pages":"76 - 85"},"PeriodicalIF":1.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141570310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Comparative Study of the Mechanical and Rheological Properties of LDPE Composites with Various Nanocarbon Fillers 含有各种纳米碳填料的低密度聚乙烯复合材料的机械和流变特性对比研究

IF 1 4区化学

Polymer Science, Series A Pub Date : 2024-07-10 DOI: 10.1134/S0965545X24600261

M. M. Gasymov, T. I. Medintseva, S. Z. Rogovina, O. P. Kuznetsova, A. V. Shapagin, A. A. Berlin

引用次数: 0