International Journal of Polymer Analysis and Characterization最新文献_第9页

Investigate the effect of short chain branching and lamellar thickness on mechanical and optical properties of linear low-density polyethylene by successive self-nucleation/annealing (SSA) technique 采用连续自成核/退火(SSA)技术研究了短链分支和片层厚度对线性低密度聚乙烯力学和光学性能的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-05-16 DOI: 10.1080/1023666X.2023.2212344

Shirin Saleki , Nasrin Khorshidi

引用次数: 1

Morphological, structural, electrical impedance, and equivalent circuit analysis of polypyrrole/barium substituted lanthanum manganite (La0.7Ba0.3MnO3) perovskite nanocomposites 聚吡啶/钡取代锰酸镧(La0.7Ba0.3MnO3)钙钛矿纳米复合材料的形态、结构、电阻抗和等效电路分析

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2201083

Smitha M. G. , Sandeep Kumar H. L. , Shwetha

{"title":"Morphological, structural, electrical impedance, and equivalent circuit analysis of polypyrrole/barium substituted lanthanum manganite (La0.7Ba0.3MnO3) perovskite nanocomposites","authors":"Smitha M. G. , Sandeep Kumar H. L. , Shwetha","doi":"10.1080/1023666X.2023.2201083","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2201083","url":null,"abstract":"<div><p>The article presents the impedance analysis of polypyrrole (PPy)/La<sub>0.7</sub>Ba<sub>0.3</sub>MnO<sub>3</sub> (LBM) nanocomposites synthesized by in situ chemical oxidation method. The morphology and crystal structure were analyzed by Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. Vibration modes were analyzed using Fourier Transform Infrared spectroscopy (FTIR). The impedance behavior of the compounds was studied using an impedance analyzer in the frequency (100 Hz − 5 MHz) and temperature (30°C − 90 °C) variation mode. Results of SEM and TEM for PPy, LBM, and PPy-LBM nanocomposites show spherical, rhombic and granular structures respectively. FTIR shows the presence of respective elements to be present for the formation of PPy, LBM, and PPy-LBM compounds. XRD patterns of PPy, LBM, and PPy-LBM nanocomposites show amorphous, orthorhombic, and semicrystalline phases respectively. The Real part of impedance shows decreasing value with frequency and the imaginary part of impedance shows the relaxing nature of the compounds. Cole − Cole analysis reveals the resistance contribution from grains and grain boundary. The equivalent circuit elucidated gives the combination of resistor and capacitor being parallel along with constant phase element and Warburg effects. The study helps us to understand the electric behavior of the samples whether capacitive or resistive type for which further studies can be conducted for sensor, anticorrosion coating, and spintronic applications.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 3","pages":"Pages 241-255"},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49880429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 visible-light driven photo-switching copolymers with pH indicating performance 具有pH指示性能的可见光驱动光开关共聚物的研制

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2202974

Xiaohong Hu , Weiwei Jin , Haitao Zhang , Qinyu Qing , Juan Pang

{"title":"Development of visible-light driven photo-switching copolymers with pH indicating performance","authors":"Xiaohong Hu , Weiwei Jin , Haitao Zhang , Qinyu Qing , Juan Pang","doi":"10.1080/1023666X.2023.2202974","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2202974","url":null,"abstract":"<div><p>Visible-light-driven azobenzene had been reported by theoretical calculation, but could not be detected by any characterization method due to unstable cis structure. Herein, copolymerization was applied to solve the problem based on a time-dependent characteristic of macromolecular motion. Therefore, two copolymers, namely, MRAA-PEG<sub>20</sub> copolymer and MRAA-NIPAM copolymer, were synthesized with a definite segment ratio. Both copolymers had photosensitive groups, which were confirmed by UV-vis spectra. Furthermore, copolymer concentration had a linear relationship with absorbance value at 425 nm. Firstly, blue light as an excitation source to induce the isomerization of copolymers. At the same time, repeated interval irradiation was used to evaluate the fatigue performance of the copolymer. Consequently, both copolymers could quickly transform to their cis isomers upon irradiation, which could be reversible recovered to their trans isomers in operable recovery time after removing irradiation. However, the MRAA-PEG<sub>20</sub> copolymer had an obvious photobleaching phenomenon along with the circle index, which did not exist in the MRAA-NIPAM copolymer. Secondly, the effects of excitation light source on isomerization were investigated. It was found that blue light was the most efficient excitation source for both copolymers though other light could also induce trans-to-cis transition. Thirdly, the influence of light intensity and temperature was respectively studied. With increasing of light intensity, the absorbance ratio before and after irradiation monotonously decreased, the irradiation response time shortened and the recovery response time prolonged. Moreover, higher temperature resulted in a higher absorbance ratio, shorter irradiation response time, and shorter recovery response time. Finally, synthesized copolymers had characteristic of pH indicator with a critical point of pH 5.0.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 3","pages":"Pages 256-268"},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49880428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 functional coating films using breath figure (BF) method and the study of morphological, optical and wettability behavior with varying experimental conditions 呼吸图(BF)法制备功能性涂膜及其在不同实验条件下的形态学、光学和润湿性研究

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2175167

Andrés Boulett , Oscar Marambio , Rudy Martin-Trasanco , Julio Sánchez , Wilson Alavia , Diego P. Oyarzún , Guadalupe Pizarro

引用次数: 0

Preparation and characterization of novel transparent and foldable polymers modified with Cr(III), Co(II), Ni(II), and Cu(II) complexes Cr(III)， Co(II)， Ni(II)和Cu(II)配合物修饰的新型透明可折叠聚合物的制备和表征

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2197720

Melike Çağlayan , Nurşen Sarı , Bekir Sarı

{"title":"Preparation and characterization of novel transparent and foldable polymers modified with Cr(III), Co(II), Ni(II), and Cu(II) complexes","authors":"Melike Çağlayan , Nurşen Sarı , Bekir Sarı","doi":"10.1080/1023666X.2023.2197720","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2197720","url":null,"abstract":"<div><p>The properties of films prepared from polystyrene (PS), poly(methyl methacrylate) (PMMA), and polystyrene (PS)/poly(methyl methacrylate) (PMMA) blends and composite films prepared with metal ion-centered complexes were compared. New complexes of Cr(III), Co(II), Ni(II), and Cu(II) prepared according to the template were synthesized from ligand L (4-hydroxy-<em>N</em>-[2-[(4-hydroxybenzoyl)amino]ethyl]benzamide) prepared by condensation of 4-hydroxybenzoic acid and ethylenediamine. Structural analysis of ligands and complexes were determined by LC-MS, <sup>1</sup>H-NMR, FTIR, UV-Vis, and XRD. The conductivities and magnetic susceptibility of novel complexes were measured. Morphological properties of the transparent films by SEM and AFM, their thermal stabilities by TGA, and their optical properties by refractometry were characterized. Original composite films of PS, PMMA, and PS/PMMA blend modified with novel complexes were obtained as thermally stable, transparent, and foldable composite films with permanent colors.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 3","pages":"Pages 225-240"},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49880430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and electrochemical properties of montmorillonite-poly(ethylene oxide) intercalated nanocomposites for lithium-ion batteries 锂离子电池用蒙脱石-聚环氧乙烷嵌层纳米复合材料的结构与电化学性能

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2207867

A.K. Nath , B. Sharma , B.J. Borah , N. Deka , J. Hazarika

{"title":"Structural and electrochemical properties of montmorillonite-poly(ethylene oxide) intercalated nanocomposites for lithium-ion batteries","authors":"A.K. Nath , B. Sharma , B.J. Borah , N. Deka , J. Hazarika","doi":"10.1080/1023666X.2023.2207867","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2207867","url":null,"abstract":"<div><p>Poly(ethylene oxide) has been intercalated inside the interlayer galleries of montmorillonite clay and the electrochemical properties of the nanocomposite have been investigated. Interlayer spacing and clay gallery width increase with increasing MMT concentration confirming intercalation of PEO into MMT as observed from XRD results. The fraction of free anions as calculated from FTIR, increases with increasing clay content and remains constant beyond 7.5 wt. % of clay content. Ionic conductivity of the order of 10<sup>−4</sup> Scm<sup>−1</sup> has been obtained in the case of MMT based electrolytes. The initial increase of conductivity with increasing MMT content can be attributed to the increase fraction of free ions which eventually increases ionic conductivity. After 7.5 wt. % of MMT loading ionic conductivity decreases due to the high viscosity of MMT. Interfacial stability results show that passivation takes place very slowly in MMT based electrolytes. Dielectric properties show that at high frequency relaxation takes place due to the segmental motion of polymer chains and it proves the hopping of ions.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 3","pages":"Pages 279-291"},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49880426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monte Carlo simulations of proton irradiation effects on PTFE, KEVLAR, EFTE, DYNEEMA, and NOMEX polymeric materials used in astronaut space suits 质子辐照对宇航员航天服中使用的PTFE、KEVLAR、EFTE、DYNEEMA和NOMEX聚合物材料的影响的蒙特卡罗模拟

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2180021

Turgay Korkut , Hatun Korkut

{"title":"Monte Carlo simulations of proton irradiation effects on PTFE, KEVLAR, EFTE, DYNEEMA, and NOMEX polymeric materials used in astronaut space suits","authors":"Turgay Korkut , Hatun Korkut","doi":"10.1080/1023666X.2023.2180021","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2180021","url":null,"abstract":"<div><p>Astronauts suffer from natural space radiation as high-energetic protons, heavy ions, and secondary particles produced in collisions. Galactic cosmic rays and solar particle events are the basic parts of space radiation spectra. Wears and accessories designs for use by astronauts aim to minimize these deleterious effects of this environment. Polymeric materials are preferred in astronaut suits because they are lightweight, inexpensive, and durable. Teflon, KEVLAR, ethylene tetrafluoroethylene, DYNEEMA, and NOMEX polymeric astronaut wear materials were exposed to high energetic proton irradiations by the use of Monte Carlo simulation tools SRIM-2013 and FLUKA 2011.1. Proton energies are applied as 1, 2, and 3 GeV known as in order of space radiation magnitude. Besides, displacement per atom calculations were done and results were discussed in the plane of structural changes in the given polymeric materials. After interacting with protons with 1, 2, and 3 GeV energies, the material with the lowest Displacement per atom value among the five studied materials is DYNEEMA with values of 1.01E − 25, 9.96E − 26, and 1.00E − 25, respectively. Again, among the materials studied for these three proton energies, DYNEEMA has the highest electronic stopping power values are, respectively, 2.11E − 03, 2.10E − 03, and 2.31E − 03. DYNEEMA has the highest nuclear stopping power values as 2.23E − 07, 1.53E − 07, and 4.27E − 07, respectively.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 3","pages":"Pages 215-224"},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49879863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and optimization of supported Ziegler–Natta catalyst preparation based on AI approach coupled with genetic algorithm 基于人工智能和遗传算法的负载型Ziegler-Natta催化剂制备模拟与优化

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2206509

Seyed Amin Mirmohammadi , Amin Hedayati Moghaddam , Naeimeh Bahri-Laleh

引用次数: 1

Effects of poly(o-phenylenediamine) functionalized SiC on the corrosion protection ability of neat polyurethane coating system in the marine environment 聚邻苯二胺官能化碳化硅对海洋环境中整齐聚氨酯涂层体系防腐性能的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-02-01 DOI: 10.1080/1023666X.2022.2155770

S. P Vinodhini , Joseph Raj Xavier

{"title":"Effects of poly(o-phenylenediamine) functionalized SiC on the corrosion protection ability of neat polyurethane coating system in the marine environment","authors":"S. P Vinodhini , Joseph Raj Xavier","doi":"10.1080/1023666X.2022.2155770","DOIUrl":"https://doi.org/10.1080/1023666X.2022.2155770","url":null,"abstract":"<div><p>A novel nanocomposite consisting of polyurethane (PU), poly(o-phenylenediamine) (PoPD), and silicon carbide (SiC) nanoparticles was investigated for its application in marine environment through electrochemical techniques. The PoPD/SiC nanofillers were characterized by TGA, XRD, SEM/EDX, and TEM analyses. The anticorrosion and mechanical properties of different coating formulation in marine environment were evaluated by electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM). It was also found that the coating resistance of PU-PoPD/SiC nanocomposite was over 41 times higher than that of the PU coating. The PU-PoPD/SiC coatings on the brass showed low current of 1.9 I/nA due to copper dissolution and 6.8 I/nA due to zinc dissolution because of the well distribution of PoPD/SiC nanofiller in PU coating. The analyses of the resultant degradation products by SEM/EDX and XRD techniques confirmed the presence of Si which has a major role in protecting the brass surface against corrosion. Results showed that the PU composite with 2 wt.% PoPD/SiC hybrid nanofillers had outstanding coating performance. This nanocomposite demonstrated improved corrosion protection. As a result, the developed PU-PoPD/SiC nanocomposite has exceptional adhesion strength and anticorrosion properties and might be exploited to develop next-generation anticorrosive coatings.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 2","pages":"Pages 113-138"},"PeriodicalIF":1.9,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49870795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Polymer-based wearable nano-composite sensors: a review 聚合物基可穿戴纳米复合传感器研究进展

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-02-01 DOI: 10.1080/1023666X.2022.2161737

Aashish Tuli , Amrinder Pal Singh

{"title":"Polymer-based wearable nano-composite sensors: a review","authors":"Aashish Tuli , Amrinder Pal Singh","doi":"10.1080/1023666X.2022.2161737","DOIUrl":"https://doi.org/10.1080/1023666X.2022.2161737","url":null,"abstract":"<div><p>The demand for stretchable, skin-mountable, and wearable strain sensors is burgeoning because they are required for several budding applications in various emerging fields, such as health monitoring, human-machine interfaces, wearable electronics, soft robotics, human motion detection, virtual reality (VR), and so forth. Recently, strain sensors based on composite materials comprising stretchable elastomer and conductive nano-filler have gathered attention on account of their ample flexibility, record stretchability, excellent durability, customizable characteristics for strain-sensing, and simpler fabrication techniques. This quality write-up discusses current developments in the field of flexible strain sensors (FSSs). We effectively summarized how advanced mechanisms, such as crack propagation, disconnection, and tunneling effect, which are quite different from traditional strain sensing techniques, are used to develop FSS. Various factors and their effects that need to be kept in mind while developing high-performance, high-quality FSSs are also debated. The performance of recently reported FSSs is comprehensively discussed, and the huge potential that FSSs hold has been comprehensively reviewed in this survey.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 2","pages":"Pages 156-191"},"PeriodicalIF":1.9,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49870796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1