Polymer Science, Series A最新文献_第3页

Rheological Properties of Poly(N-vinylpyrrolidone) Solutions in a Magnetic Field and in Its Absence 聚n -乙烯基吡咯烷酮溶液在磁场和无磁场条件下的流变性能

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-05-29 DOI: 10.1134/S0965545X26600298

E. V. Rusinova, S. A. Vshivkov, Zh. I. Suldina

引用次数: 0

Effect of Polyvinyl alcohol (PVA) on the CO2/He Separation Performance of PVA/Sodium Polyacrylate Membranes 聚乙烯醇对聚乙烯醇/聚丙烯酸钠膜CO2/He分离性能的影响

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-05-26 DOI: 10.1134/S0965545X26600249

Fuminori Ito, Hidetaka Yamada

{"title":"Effect of Polyvinyl alcohol (PVA) on the CO2/He Separation Performance of PVA/Sodium Polyacrylate Membranes","authors":"Fuminori Ito, Hidetaka Yamada","doi":"10.1134/S0965545X26600249","DOIUrl":"10.1134/S0965545X26600249","url":null,"abstract":"In this study, the optimal degree of polymerization of polyvinyl alcohol (PVA) and appropriate carbonate content necessary to enhance the separation performance of a CO2 separation membrane were determined. The membrane was composed of a composite polymer of PVA, which is known for its gas barrier properties, and sodium polyacrylate (PAANa), which acts as a water-absorbing agent. The PVA/PAANa membranes exhibited pressure resistance even without a cross-linking agent. To further improve the separation performance, membranes were prepared using PVA with four different degrees of polymerization (400–600, 1500–1800, 2000, and 3100–3900), and their separation capabilities were evaluated. Additionally, the optimal amount of caesium carbonate that enhances CO2 permeance was determined. It was found that separation membranes made from PVA with a degree of polymerization of 1500-2000 exhibited higher separation performance. In particular, separation membranes fabricated with PVA with a degree of polymerization of 2000 showed the best separation performance. As a result, a high-performance CO2 separation membrane was successfully developed, achieving a CO2 separation performance of approximately 3.2E-10 (m3(STP)/(m2 s Pa)) and a CO2/He selectivity 700.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"68 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173104","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

Extraction of Portunus Trituberculatus Chitosan and Their Characteristics 三疣梭子蟹壳聚糖的提取及其特性研究

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-05-26 DOI: 10.1134/S0965545X26600237

A. T. Abdurasulov, Sh. Sh. Khudoyberdiyev, N. R. Vokhidova, S. Sh. Rashidova

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Digital Pixel Intensity as a Proxy for DSC Features in the Optical Thermal Analysis of Isotactic Polystyrene 数字像素强度作为等规聚苯乙烯光学热分析中DSC特征的代表

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-05-19 DOI: 10.1134/S0965545X25601054

Al Mamun, Abbas Ghanbari, Gary S. Coombs

{"title":"Digital Pixel Intensity as a Proxy for DSC Features in the Optical Thermal Analysis of Isotactic Polystyrene","authors":"Al Mamun, Abbas Ghanbari, Gary S. Coombs","doi":"10.1134/S0965545X25601054","DOIUrl":"10.1134/S0965545X25601054","url":null,"abstract":"The crystallization behavior of semicrystalline polymers is crucial for tailoring material properties for industrial and scientific applications, particularly when traditional methods such as differential scanning calorimetry (DSC) are precluded by cost, inaccessibility, or sample size. We investigated the potential of digitally extracted pixel intensity using Polarized Optical Microscopy (POM) as a quantitative substitute for DSC for assessing polymer melting and crystallization behaviors. Using isotactic polystyrene (iPS) as a model polymer, rigorous calibration established a correlation between illuminance and digitally extracted pixel intensity (DPI). Calibration enables real-time in situ monitoring of crystallization and melting processes. Comparative analyses of melting endotherms and crystallization exotherms obtained using DPI and DSC demonstrated a strong correlation, validating DPI as an effective thermal analysis method. This study also highlights the non-destructive nature of DPI, its morphological visualization capabilities, and its potential for integration with automated digital imaging and machine-learning techniques. These findings offer a promising pathway to accessible, cost-effective, and real-time polymer characterization, which transcends limitations of conventional calorimetry. When rigorously calibrated against illuminance, DPI can track melting and crystallization trends that correlate with DSC heat flow features. However, DPI does not measure heat flow and should be interpreted as an optical surrogate, not a calorimetric equivalent.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"68 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147968000","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

Molecular Dynamic Analysis of Intramolecular Mobility in Polyimides 聚酰亚胺分子内迁移率的分子动力学分析

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-05-19 DOI: 10.1134/S0965545X25601029

V. Ryzhikh, N. Belov, N. Balabaev, M. Mazo, R. Khudobin

{"title":"Molecular Dynamic Analysis of Intramolecular Mobility in Polyimides","authors":"V. Ryzhikh, N. Belov, N. Balabaev, M. Mazo, R. Khudobin","doi":"10.1134/S0965545X25601029","DOIUrl":"10.1134/S0965545X25601029","url":null,"abstract":"Molecular dynamics models of five polyimides (PIs) based on commercially available dianhydrides PMDA, BTDA, ODPA, 6FDA, and BPADA and 1,4-bis-[{2′-trifluoromethyl 4′-(4″-aminophenyl)phenoxy}] 2,5-di-t-butylbenzene (FMTBDA) were constructed. Intramolecular mobility of these polyimides was investigated via analysis of the distribution of torsion angles values, torsion angle fluctuation amplitude and rotational mobility of aromatic rings. It was demonstrated that two phenyl rings in diamine connected by С–С bond, are forming quite rigid fragments with predominantly uniplanar position of the rings, while two phenyl rings connected by C–N bonds (between diamine and di-anhydride) allow greater variety of conformations. Nevertheless, the imide cycle of the dianhydride fragment conjugated to the diphenyl fragment of diamine tend to form a plane. The mobility of the polymers being investigated ascends in the order: BPADA-FMTBDA < 6FDA-FMTBDA ≅ ODPA-FMTBDA ≅ BTDA-FMTBDA < PMDA-FMTBDA. This trend agrees well enough with previously obtained estimates for their fractional free volume (FFV). Trajectories for the pairs of dihedral angles were estimated, showing that these mainly contain the jumps between the minima of the rotation energy diagrams. Lower rotational mobility of the di-tert-butylbenzene fragment in all the polymers was observed, which is due to the moment of inertia of the bulky tert-butyl groups and due to the restriction of the mobility in a dense amorphous polymer matrix because of these groups.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"68 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147968141","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

Pore Growth during Stretching of Polymerization-Filled Polyethylene 聚合物填充聚乙烯拉伸过程中的孔隙生长

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-05-19 DOI: 10.1134/S0965545X26600201

S. S. Gusarov, O. I. Kudinova, S. L. Bazhenov, A. A. Gulin, L. A. Novokshonova

{"title":"Pore Growth during Stretching of Polymerization-Filled Polyethylene","authors":"S. S. Gusarov, O. I. Kudinova, S. L. Bazhenov, A. A. Gulin, L. A. Novokshonova","doi":"10.1134/S0965545X26600201","DOIUrl":"10.1134/S0965545X26600201","url":null,"abstract":"This study investigated pore growth during stretching of polymerization-filled composites based on Al2O3 particles coated with ultra-high-molecular-weight PE, HDPE, or a dual-layer ultra-high-molecular-weight PE/HDPE coating. The particles were spherical in shape with an average diameter of 20 μm. When the composite was stretched, the particles exfoliated, creating pores. During stretching, the spherical pores were elongated, first becoming elliptical and then conical. The sharp angles of the rhomboid pores are due to the plastic flow of the polymer, not its degradation. Pore volume increases linearly with the material extension ratio. This increase in pore volume is due to the presence of rigid particles within the pores, which limit the lateral contraction of the composite. Bands representing transverse interactions between the particles and the polymer are visible in the equatorial region of the pores. Presumably, polymer elongation is greatest in these microregions and the polymer degradation process begins in them. It has been hypothesized that at a temperature of 190°C, the tensile stresses generated during composite pressing do not relax in the ultra-high-molecular-weight PE melt. This is explained by a molecular entanglement network.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"68 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147968143","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

Influence of Iodine on the Structure of Poly(ε-caprolactone) 碘对聚ε-己内酯结构的影响

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-03-19 DOI: 10.1134/S0965545X26600110

E. S. Trofimchuk, N. I. Nikonorova, T. E. Grokhovskaya, A. V. Efimov, A. V. Bakirov, A. A. Puchkov, A. V. Bol’shakova, A. A. Dolgova, I. D. Kovtun, N. G. Sedush

{"title":"Influence of Iodine on the Structure of Poly(ε-caprolactone)","authors":"E. S. Trofimchuk, N. I. Nikonorova, T. E. Grokhovskaya, A. V. Efimov, A. V. Bakirov, A. A. Puchkov, A. V. Bol’shakova, A. A. Dolgova, I. D. Kovtun, N. G. Sedush","doi":"10.1134/S0965545X26600110","DOIUrl":"10.1134/S0965545X26600110","url":null,"abstract":"Changes in the structure and mechanical properties of poly(ε-caprolactone) films and fibers during their exposure to iodine vapors have been studied. The limit content of iodine in polymer samples has been reached in 15–18 h, being about 5% by weight. The value of the diffusion coefficient of I2 in semicrystalline samples of poly(ε-caprolactone) has been determined to be 1.7 × 10−11 cm2/s. It has been found that the process of iodine sorption into the polymer is accompanied by a gradual decrease in the value of the long period from 16 to 12 nm. Simultaneously, degree of crystallinity and strength of poly(ε-caprolactone) samples have been changed nonlinearly. It has been suggested that the changes in structural and mechanical parameters at the initial stages of iodine sorption are associated with the formation of a complex with charge transfer between iodine and the ester group of the polymer. At later stages, as a result of destruction of poly(ε-caprolactone) and decrease in the number-average molecular weight to 9 × 103, crystallization of the polymer has occurred in the amorphous layers, leading to an increase in the degree of crystallinity to 75–79% and sharp embrittlement of the samples.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"67 6","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560675","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

Critical Analysis of the Results of Applying the Laser Method for Determining the Parameters of the Composite Model of the Chain Termination Rate Coefficient 应用激光方法确定链终止率系数复合模型参数结果的关键分析

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-03-19 DOI: 10.1134/S0965545X26600109

A. N. Nikitin

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Preparation and Characterization of Highly Aligned Ferromagnetic PVDF/Fe3O4 Nanocomposite Fibrous Coating for Icephobic Applications 高排列铁磁PVDF/Fe3O4纳米复合纤维涂层的制备与表征

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-03-19 DOI: 10.1134/S0965545X26600043

Dilara Sadigova, Rasoul Moradi, Rasim Jabbarov

{"title":"Preparation and Characterization of Highly Aligned Ferromagnetic PVDF/Fe3O4 Nanocomposite Fibrous Coating for Icephobic Applications","authors":"Dilara Sadigova, Rasoul Moradi, Rasim Jabbarov","doi":"10.1134/S0965545X26600043","DOIUrl":"10.1134/S0965545X26600043","url":null,"abstract":"Unwanted icing on solid surfaces presents a critical challenge in a wide range of technological applications due to its detrimental effects on functional stability, energy efficiency, and overall system reliability. To address this phenomenon, multiple strategies have been explored, including the development of icephobic surface coatings, mechanical deicing techniques, thermal deicing systems, deployment of chemical deicing agents, and other advanced mitigation methods. In this study, novel nano-magnetically functionalized polyvinylidene fluoride (PVDF)/Fe3O4 fibrous films were engineered, exhibiting enhanced potential for use as icephobic materials. The electrospinning process was employed to fabricate highly aligned ferromagnetic nanofibers, with the incorporation of magnetite (Fe3O4) nanoparticles into the PVDF matrix leading to a significant increase in the electroactive β-phase fraction. The application of a directional magnetic field during electrospinning facilitated the production of uniformly oriented nanofiber architectures, enabling comprehensive evaluation of their morphological characteristics and anti-icing performance. Advanced characterization techniques, including wettability and icephobicity assessments, infrared spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM), and scanning electron microscopy (SEM), were employed. The findings demonstrate that the precisely oriented nano-fibrous magnetic coatings exhibit superior icephobic performance, underscoring their suitability for next-generation anti-icing and deicing applications in critical technological systems.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"67 6","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560673","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

The Effect of the Silicon Shell of Magnetic Microparticles on the Viscoelastic Properties of Magnetoactive Silicone Elastomers and Their Response to an External Magnetic Field 磁性微粒的硅壳对磁活性有机硅弹性体粘弹性的影响及其对外加磁场的响应

IF 1.1 4区化学

Polymer Science, Series A Pub Date : 2026-03-19 DOI: 10.1134/S0965545X26600092

S. A. Kostrov, A. V. Dolmatov, E. Yu. Kramarenko

{"title":"The Effect of the Silicon Shell of Magnetic Microparticles on the Viscoelastic Properties of Magnetoactive Silicone Elastomers and Their Response to an External Magnetic Field","authors":"S. A. Kostrov, A. V. Dolmatov, E. Yu. Kramarenko","doi":"10.1134/S0965545X26600092","DOIUrl":"10.1134/S0965545X26600092","url":null,"abstract":"Magnetic microparticles with silicon shells of varying thickness have been obtained by modifying the surface of carbonyl iron. The structure and magnetic properties of the particles have been studied using scanning electron microscopy and vibrational magnetometry. The original and modified particles have been used as fillers to create magnetoactive elastomers based on polydimethylsiloxane. The concentration of magnetic particles in the magnetoactive elastomers varied from 40 to 80 wt %. Dynamic mechanical analysis showed that the initial shear storage moduli of the samples ranged from 5 to 25 kPa, increasing with increasing filler concentration and reaching values of approximately 400 kPa when a magnetic field was applied. At an equal particle volume fraction, the presence of the shell leads to a decrease in the storage modulus of the samples. In a magnetic field, samples with an equal fraction of iron but different thicknesses of the nonmagnetic shell demonstrate approximately the same storage moduli in the region of low particle concentration values; in the region of intermediate values, the presence of the shell leads to an increase in the storage modulus, and in the region of high values, to its decrease.","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":"67 6","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560674","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