Polymer Science, Series B最新文献_第9页

Study of Structural, Thermal and Electrical Properties of Functionalized Multiwalled Carbon Nanotubes–Polyaniline Composites 功能化多壁碳纳米管-聚苯胺复合材料的结构、热学和电学性能研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S1560090422700233

Sundas Zafar, Tasneem Zahra Rizvi

{"title":"Study of Structural, Thermal and Electrical Properties of Functionalized Multiwalled Carbon Nanotubes–Polyaniline Composites","authors":"Sundas Zafar,  Tasneem Zahra Rizvi","doi":"10.1134/S1560090422700233","DOIUrl":"10.1134/S1560090422700233","url":null,"abstract":"<div><div><h3>\u0000 Abstract—</h3>This paper discusses the various ways for synthesizing polyaniline (PANI) and hybrid carbon nanotube (CNT) reinforced PANI nanocomposites. A series of polyaniline/functionalized multi-walled carbon nanotubes (PANI/f-MWCNTs) nanocomposites with varying concentrations (0–20% wt/wt) of f‑MWCNTs in PANI were prepared using in situ polymerization of aniline in an aqueous dispersion of f‑MWCNTs using FeCl3·6H2O as an oxidant. Functionalization of MWCNTs was achieved by their acid treatment. The dispersion of functionalized carbon nanotubes, filler concentration, and their alignment in the interior of PANI matrix affect their morphology. The structure and morphology of the obtained pure PANI and PANI/f-MWCNTs nanocomposites were characterized by using X-rays diffraction (XRD) and scanning electron microscopy (SEM). These techniques indicate that f-MWCNTs act as the core in the formation of a coaxial nanostructure. Thermogravimetric analysis (TGA) was carried out to study the thermal stability of the nanocomposites and the pristine polymer, which showed that the thermal stability of the nanocomposites increased with the increasing content of f-MWCNTs in PANI. The effect of MWCNT on the transport properties of PANI in the form of the transport parameters such as charge localization length, most probable hopping distance, and charge hopping energy in the temperature range 300–423 K was also studied.</div></div>","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"573 - 580"},"PeriodicalIF":1.2,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5170521","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: 1

Photoinduced Processes in System Ferrocene + Cyanate Ester 二茂铁+氰酸酯体系的光诱导过程

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S1560090422700312

D. A. Gurov, E. S. Sorin, G. F. Novikov

引用次数: 0

Nitrones and Nitroso Compounds in the Coupling Reactions for the Synthesis of Macromolecular Structures Based on Polystyrene 以聚苯乙烯为基合成大分子结构的偶联反应中的硝基和亚硝基化合物

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S1560090422700257

E. V. Kolyakina, F. Kh. Shoipova, D. F. Grishin

引用次数: 0

Study on Lanthanum Cerium 6-Methyluracil As Heat Stabilizer of Polyvinyl Chloride 6-甲基尿嘧啶镧铈作为聚氯乙烯热稳定剂的研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S1560090422700300

Xubo Huang, Junwei Fan, Zhaogang Liu, Jingang Zhao, Mingguang Chen, Yanhong Hu, Jinxiu Wu

{"title":"Study on Lanthanum Cerium 6-Methyluracil As Heat Stabilizer of Polyvinyl Chloride","authors":"Xubo Huang, Junwei Fan, Zhaogang Liu, Jingang Zhao, Mingguang Chen, Yanhong Hu, Jinxiu Wu","doi":"10.1134/S1560090422700300","DOIUrl":"10.1134/S1560090422700300","url":null,"abstract":"Rare earth thermal stabilizers are a kind of newly discovered stabilizers, which are considered as a series of very promising stabilizers for inhibiting the degradation of PVC in the application and processing. Therefore, the continued exploration of new rare earth heat stabilizer is very necessary for scientific research and practical application. In this work, a new rare earth thermal stabilizer lanthanum cerium 6-methyluracil (LCMUA) was successfully synthesized via using cerium nitrate, lanthanum nitrate, 6-methyluracil (MUA) and aqueous ammonia as raw materials. And it was characterized by elemental analysis, FTIR, TG and other methods, the molecular formula of lanthanum cerium 6-methyluracil is confirmed as: La0.35Ce0.65(C5H4N2O2)NO3⋅2H2O. Subsequently, congo red tests and thermal aging tests of pristine LCMUA and LCMUA with calcium stearate (CaSt2), zinc stearate (ZnSt2), and pentaerythritol (PE) composite samples were performed, when LCMUA/CaSt2/PE is compounded with mass ratio of 3 : 1 : 1, the heat stabilization time reached 70 min, and the heat stabilization performance was the best, which is better compared to those of commercial CaSt2 and ZnSt2. The excellent experimental results can be attributed to the special absorption effect of LCMUA for hydrogen chloride gas derived from the thermal decomposition of PVC, thereby removing in time hydrogen chloride gas to restrain the PVC self-decomposition process caused by HCl gas.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"402 - 410"},"PeriodicalIF":1.2,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5169254","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

New Approach to the Synthesis of Thermoresponsive Polyrotaxanes 热响应性聚轮烷合成的新方法

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S156009042270021X

M. P. Kurlykin, M. M. Dudkina, T. Yu. Kirila, A. P. Filippov, A. V. Ten’kovtsev

引用次数: 1

Fabrication of Bone Morphogenic Protein-2 and Icariin-Containing Sustained-Release Microcapsule and Evaluation of its Osteogenic Differentiation Capacity in MC3T3-E1 Cells 骨形态发生蛋白-2及含淫羊藿苷缓释微胶囊的制备及其在MC3T3-E1细胞成骨分化能力的评价

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S1560090422700270

Zhen Hua, Jian Cheng, Dong-jian Shi, Ji-wei Chen, Hong-cheng Peng, Ming-ming Liu

{"title":"Fabrication of Bone Morphogenic Protein-2 and Icariin-Containing Sustained-Release Microcapsule and Evaluation of its Osteogenic Differentiation Capacity in MC3T3-E1 Cells","authors":"Zhen Hua, Jian Cheng, Dong-jian Shi, Ji-wei Chen, Hong-cheng Peng, Ming-ming Liu","doi":"10.1134/S1560090422700270","DOIUrl":"10.1134/S1560090422700270","url":null,"abstract":"The delivery of cytokines and Chinese medicines using biodegradable microspheres may promote bone regeneration. We designed a sustained-release microcapsule containing bone morphogenetic protein-2 (BMP2) and icariin (ICA) and evaluated its effects on osteogenic differentiation in MC3T3-E1 cells. ICA was preloaded onto sodium alginate-grafted phenylboronic acid (Alg-PBA) particles. Alg-PBA-ICA was used to coat the surface of SiO2-NH2 colloids by electrostatic interaction, and then SiO2 colloids were etched using HF. The Alg-PBA-ICA vesicles were immersed in a BMP2 solution, and Alg-PBA-ICA/BMP2 microcapsules were obtained. The optimal concentration of ICA and BMP2 for osteogenic differentiation induction was selected. We evaluated the microcapsules' osteogenic differentiation capacity. The microcapsules displayed intact morphology without obvious broken debris. The size of Alg-PBA-ICA@SiO2 microcapsules was 210 ± 2 nm; the surface charge was –15.70 ± 2.12 mV. BMP2 (100 ng/mL) combined with 10 nM ICA had the strongest effect on cell behavior. The osteo-inductive effect at this concentration was stronger than that of the other combinations. The mRNA and protein expression levels of osteogenic genes increased after treatment with the microcapsules following 7 days of stimulation. This new drug delivery system has powerful osteo-inductive effects on MC3T3-E1 cells.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"487 - 499"},"PeriodicalIF":1.2,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5171600","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

Syntheses and Characterization of Skeletally Modified Cardanol Based Asymmetric Benzoxazines with Enhanced Thermal and Hydrophobic Properties 骨架修饰腰果酚基非对称苯并恶嗪的合成与表征

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S1560090422700294

Govindraj Latha, Rajalakshmi D, Srinivasan Harinei, Arumugam Hariharan, Krishnasamy Balaji, Muthukaruppan Alagar

{"title":"Syntheses and Characterization of Skeletally Modified Cardanol Based Asymmetric Benzoxazines with Enhanced Thermal and Hydrophobic Properties","authors":"Govindraj Latha, Rajalakshmi D, Srinivasan Harinei, Arumugam Hariharan, Krishnasamy Balaji, Muthukaruppan Alagar","doi":"10.1134/S1560090422700294","DOIUrl":"10.1134/S1560090422700294","url":null,"abstract":"<div><div><h3>\u0000 Abstract—</h3>Two different skeletally modified cardanol based asymmetric benzoxazines monomers, cardanol-aminophenol/p-toludine and cardanol-aminophenol/4-fluoroaniline, were synthesized using cardanol, 4‑aminophenol, p-toludine/4-fluoroaniline and paraformaldehyde through Mannich condensation reaction. The molecular structure of the benzoxazine monomers was confirmed by FTIR and 1H-NMR spectral analyses. Cure behavior and thermal stability were studied using differential scanning calorimetry and thermogravimetric analysis respectively. It was found that these benzoxazines exhibit marginally lower polymerization temperature than that of conventional benzoxazines. The formation of polybenzoxazine was confirmed by FTIR analysis after the thermal curing through the cleavage of benzoxazine ring and subsequently led to the formation of three-dimensional cross-linked network structure. Among the polybenzoxazines studied, poly(cardanol-aminophenol/4-fluoroaniline) possess better thermal stability than that of poly(cardanol-aminophenol/p-toludine) due to fluoro substitution in the molecular structure of benzoxazine. Both polybenzoxazines exhibit an excellent thermal and hydrophobic behavior.</div></div>","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"373 - 381"},"PeriodicalIF":1.2,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5171613","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

Isolation and Physicochemical Characteristics of Pectin from Inonotus Hispidus 柳条果胶的分离及理化性质研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-08-31 DOI: 10.1134/S1560090422700221

S. B. Khaytmetova, A. S. Turaev, G. A. Khalilova

引用次数: 0

Studies on Structural, Dielectric, and Electrical Properties of the PMMA-BNT Ceramics Polymer Composites PMMA-BNT陶瓷聚合物复合材料的结构、介电和电性能研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-07-08 DOI: 10.1134/S1560090422700208

Rashmiranjan Patra, Debabrata Mohanty, Pramod Ku. Nayak, Santosh Ku. Satpathy, S. K. Parida

{"title":"Studies on Structural, Dielectric, and Electrical Properties of the PMMA-BNT Ceramics Polymer Composites","authors":"Rashmiranjan Patra, Debabrata Mohanty, Pramod Ku. Nayak, Santosh Ku. Satpathy, S. K. Parida","doi":"10.1134/S1560090422700208","DOIUrl":"10.1134/S1560090422700208","url":null,"abstract":"In this communication, the structural and electrical properties of modified polymethyl methacrylate bismuth nickel titanate ceramic polymer composites are reported. The nickel doped bismuth titanate ceramics are prepared using a high-temperature solid-state reaction technique and composites with 3 and 10% ceramic fillers are prepared using the solution casting method. The average crystallite size for 3 and 10% ceramic fillers is 28.8 nm and 21 nm respectively. The structural analysis confirms the presence of the nickel phase in the composite films. The scanning electron microscopy micrograph reveals the irregular distribution of ceramic particles over composite films, particularly in 10% fillers. The study of dielectric properties suggests that the composites have a high dielectric constant and low loss, which is related to the irregular distribution of the fillers in the polymer matrix. The conductivity increases with an increase in frequency and it also obeys the universal power law. The impedance study shows the conduction process increases with an increase in frequency and confirms negative temperature coefficient resistance character. The modulus study indicates the presence of dielectric relaxation in a high concentration of ceramic fillers. The semiconductor nature of the composite is confirmed and it may find suitable applications in microelectronic devices and sensors.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"539 - 545"},"PeriodicalIF":1.2,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4340943","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: 2

Enhancing Glass Transition Temperature of Poly(methylmethacrylate) by Incorporating Methacrylate-Functional Silane Grafted SiO2 Nanoparticles 甲基丙烯酸甲酯-功能硅烷接枝二氧化硅纳米颗粒提高聚甲基丙烯酸甲酯玻璃化转变温度

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-07-08 DOI: 10.1134/S1560090422700191

Emre Yavuz, Ramazan Erdem, Esin Akarsu

{"title":"Enhancing Glass Transition Temperature of Poly(methylmethacrylate) by Incorporating Methacrylate-Functional Silane Grafted SiO2 Nanoparticles","authors":"Emre Yavuz, Ramazan Erdem, Esin Akarsu","doi":"10.1134/S1560090422700191","DOIUrl":"10.1134/S1560090422700191","url":null,"abstract":"Nanocomposites attract the attention of researchers due to the increasing demand on materials having unique properties. Incorporation of nanoparticles into polymers considerably improves some materials properties such as thermal stability. In current study, PMMA/SiO2 hybrid nanocomposites including ungrafted and grafted silica nanoparticles have been prepared. The surfaces of SiO2 nanoparticles were grafted with 3-(methacryloyloxypropyl)trimethoxysilane (MPTS) and 3-(methacryloyloxypropyl)triethoxysilane (MPTES) by sol-gel technique. The structure, morphology and thermal properties of the obtained bulk materials were investigated by FTIR, SEM-EDX, TGA and DSC. Based on the studies of infrared spectroscopy, polymerization of MMA monomers was approved by following the intensity of acrylate group. Thermal characteristics of nanocomposite structures enhanced remarkably as SiO2 nanoparticles were introduced to the polymer matrix and glass transition temperature Tg value reached to the highest (166°C) for MPTES@20% SiO2-PMMA hybrid nanocomposite. According to SEM analysis, the most homogenous structure belonged to MPTES@20% SiO2-PMMA hybrid nanocomposite.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"546 - 552"},"PeriodicalIF":1.2,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4345007","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