International Journal of Polymer Analysis and Characterization最新文献_第7页

Mixing strategy and tensile strength characterization of WTR-PP composite WTR-PP复合材料的混炼策略及拉伸强度表征

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-07-04 DOI: 10.1080/1023666X.2023.2238439

Zahir Ahmed Khan, M. Faizan

引用次数: 0

Determination of dielectric performance and surface heteromorphology in single-walled carbon nanotube/vinylester polymer composites by fractal approaches 用分形法测定单壁碳纳米管/乙烯基聚合物复合材料的介电性能和表面异型性

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-07-04 DOI: 10.1080/1023666X.2023.2240098

A. Ilgaz, M. Bayirli

{"title":"Determination of dielectric performance and surface heteromorphology in single-walled carbon nanotube/vinylester polymer composites by fractal approaches","authors":"A. Ilgaz, M. Bayirli","doi":"10.1080/1023666X.2023.2240098","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2240098","url":null,"abstract":"Abstract This study aims to establish a relationship between the dielectric characteristics and fractal parameters of single walled carbon nanotube reinforced vinylester based nanocomposites manufactured by sheet molding compound process. The complex dielectric permittivity was analyzed and interpreted using electric modulus formalism. The topography of both unfilled and single-walled carbon nanotube reinforced nanocomposites has been investigated using scanning electron microscopy (SEM) to provide correlation between experimental dielectric data and fractal theory. The self-similar microstructure was observed in micro photos for both materials. The superficial particle and cluster coverage ratio were calculated with the application of the scaling theory. Additionally, critical exponent and the fractal dimensions that determine the environment-area relationship have been determined by Slit Island Method (SIM) which is used to process 2-dimensional digital microscopic images. Fractal dimensions estimated with SIM were compared with the fractal dimensions computed obtained by box counting method for reliable results. It has been revealed that the surface of the composite consists of amorphous clusters with different sizes independent of each other and the structure is self-affine. In addition, the superficial area and cluster size have been shown to have a significant effect on the fractal dimension. As a result, the relationship between the dielectric permittivity of the material, determined by the electrical module formalism, and the morphological surface formation defined by the fractal analysis method and the SIM method, were determined and the results were compared with similar studies in the literature in this article.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88004912","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

Effect of thermal ageing on electrical, mechanical properties of glass fiber reinforced polymer and its impact on service life 热老化对玻璃纤维增强聚合物电学、力学性能的影响及其对使用寿命的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-07-04 DOI: 10.1080/1023666X.2023.2240099

Madhu Bilugali Mahadevaswamy, R. Aradhya, Sundara Rajan Jagannathan

{"title":"Effect of thermal ageing on electrical, mechanical properties of glass fiber reinforced polymer and its impact on service life","authors":"Madhu Bilugali Mahadevaswamy, R. Aradhya, Sundara Rajan Jagannathan","doi":"10.1080/1023666X.2023.2240099","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2240099","url":null,"abstract":"Abstract The mechanical and electrical properties of polymer composites often degrade due to environmental factors and shorten their service life. This article presents the effect of high temperatures on the mechanical and electrical characteristics of glass fiber reinforced composites and from the measurements, an attempt is made to predict the service life. Electrical conductivity, impedance and resistance are studied with a short-term temperature effect at 30, 60, 120, and 180 °C. The effect of temperature exposure at 120 and 160 °C for 1000, 2000, and 3000 h has been investigated to assess the changes in flexural, compressive, and tensile properties and for prediction of service life. Morphological studies are carried out to support some of the experimental results. The mechanical properties of composites are observed to deteriorate with the duration of aging. Flexural, tensile, and compressive strengths reveal a reduction of 8, 10, and 9%, after aging at 3000 h at 160 °C. The tensile strength and tensile modulus at 120 °C aged for 3000 h exhibit minimal changes as compared to unaged composites. However, with an increase in temperature to 160 °C, there is a reduction in tensile strength and modulus of composites by less than 10%, and 6% compared to composites with nanofillers. The variations in compression strength at 120 and 160 °C is not significant. Based on the reduction of tensile strength with temperature, the service life of composites has been estimated. For a predicted service life of 20 years, composites with nanofillers would be able to retain tensile strength of 90% of tensile strength.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79829550","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

Investigation of the structural variations of cellulose microcrystals obtained after acid hydrolysis of waste cotton: a statistical approach 废棉酸水解后纤维素微晶结构变化的研究:统计学方法

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-07-04 DOI: 10.1080/1023666X.2023.2247252

Vishnuvarthan Muthusamy, Vaideki Krishnakumar

{"title":"Investigation of the structural variations of cellulose microcrystals obtained after acid hydrolysis of waste cotton: a statistical approach","authors":"Vishnuvarthan Muthusamy, Vaideki Krishnakumar","doi":"10.1080/1023666X.2023.2247252","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2247252","url":null,"abstract":"Abstract The intricate and complex network of inter- and intramolecular hydrogen bonds in cellulose exerts a significant influence on the overall crystallographic structure of the cellulose polymer. Hence, understanding the hydrogen bonding interactions during cellulose hydrolysis is vital for tailoring the degree of crystallinity of cellulose-based materials like cellulose microcrystals (CMCs). In this study, we used a Box–Behnken statistical tool to optimize the experimental parameters for synthesizing CMCs with a high total crystallinity index (TCI). We then used field emission scanning electron microscopy, X-ray photoelectron spectrometry, X-ray diffraction, and Fourier transform infrared spectroscopy to investigate the morphological, chemical, crystalline, and structural changes that occurred in the CMC sample with the highest TCI. Our results showed that the hydrolysis process modified the hydrogen bonding network in cellulose, which resulted in an enhanced TCI. The changes in hydrogen bonding significantly affected CH bending and stretching absorption, resulting in an increased TCI of the cellulose samples. This increased TCI plays a significant role in enhancing the reinforcing properties of CMCs. Our findings highlight new insights into the role of hydrogen bonding in the TCI of CMCs and could lead to the development of new methods for controlling the TCI of cellulose. Highlights of the article Optimization of the acid hydrolysis process of waste cotton using Box–Behnken design to obtain cellulose microcrystals (CMCs). Extraction of the mathematical model that influences the total crystallinity index of CMCs. Investigation of morphological, chemical, crystalline, and structural changes in CMCs. Comparison of hydrogen bonding network between waste cotton fibers and CMCs. Increased TCI enhances CMCs’ reinforcing properties in composites.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72458169","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

Effect of silane coupling agent on the ultraviolet weathering behavior of polylactic acid based composites 硅烷偶联剂对聚乳酸基复合材料紫外线耐候性的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-07-04 DOI: 10.1080/1023666X.2023.2250620

Yufeng Sun, Ziheng Zhang, Yapeng Wang, Jinwei Wang, Zipeng Zheng, Bin Yang, Dongming Shi, Wenlong Mu, Kaiyuan Zhou, Liang Chen, Jilai Ying, Xinping Liu, Defeng Li, Guangyin Xu

{"title":"Effect of silane coupling agent on the ultraviolet weathering behavior of polylactic acid based composites","authors":"Yufeng Sun, Ziheng Zhang, Yapeng Wang, Jinwei Wang, Zipeng Zheng, Bin Yang, Dongming Shi, Wenlong Mu, Kaiyuan Zhou, Liang Chen, Jilai Ying, Xinping Liu, Defeng Li, Guangyin Xu","doi":"10.1080/1023666X.2023.2250620","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2250620","url":null,"abstract":"Abstract Polylactic acid (PLA) is a promising material due to its biodegradability and compatibility. However, the limited resistance to ultraviolet (UV) degradation of PLA composites hinders their use in automotive interior materials. In our previous work, we successfully prepared 3D printed filaments by combining KH550-treated micro-nano rice husk (MNRH) fibers with KH570-treated PLA, which exhibited favorable performance. This study aimed to investigate the effects of silane coupling agents, MNRH, and accelerated UV weathering time on the photodegradation behavior of 3D printed PLA-matrix composites reinforced with MNRH. Scanning electron microscopy (SEM), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) were utilized to characterize the 3D printed PLA-matrix composites. Furthermore, an exponential equation between tensile strength and UV weathering time was established, providing theoretical guidance for predicting the service life of automotive interior materials based on PLA composites. The morphological characterization experimental results indicate that with prolonged UV aging time, both PLA and RH6-KH550/KH570 composite materials transitioned from transparency to translucency. This transition can be attributed to the rupture of polylactic acid molecular chains and chemical bonds during the UV aging process. FTIR test results revealed the formation of carboxylic acid in the composite, and the reduction of C = O absorption intensity indicated that MNRH and silane coupling agents exhibited a stabilizing effect on the UV durability of the RH6-KH550/KH570 composite. TGA and DSC results indicated that KH550 and KH570 delayed the photodegradation rate of PLA-matrix composites.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90000930","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

Investigation of electrical resistance on coir fiber reinforced P-polyvinyl chloride composites 椰壳纤维增强对聚氯乙烯复合材料的电阻研究

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-07-04 DOI: 10.1080/1023666X.2023.2250616

Sampath Aravindh, V. Gopalan

{"title":"Investigation of electrical resistance on coir fiber reinforced P-polyvinyl chloride composites","authors":"Sampath Aravindh, V. Gopalan","doi":"10.1080/1023666X.2023.2250616","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2250616","url":null,"abstract":"Abstract Current power electronics instruments like switches, cables, transformers and good electrical insulating materials are gaining consideration for their compact and environmental design. A plasticized polyvinyl chloride/coir fiber-based polymer composite, displaying good electrical resistance, is suggested to meet these objectives. Coir fiber is chosen as it gives powered strength and has fewer lumens than other fillers. Plasticized polyvinyl chloride is strengthened using coir fiber to create a insulating polymer composites. The design of experiments (DOE) method is used to create various samples with 2/4/6 wt.% of fiber content, 75/150/225 μm of fiber size and triethoxy (ethyl) silane (1)/sodium hydroxide (2)/potassium hydroxide (3) of chemical treatments using the response surface methodology through Box–Behnken design. Further, analysis of variance (ANOVA) is carried out using MINITAB statistical software to achieve optimum parameter levels through the regression equation. Additionally, the comparison of experimental and optimized findings leads to error analysis. A combination of 2 wt.% of coir fiber, 208.33 μm of coir fiber size and Triethoxy(ethyl) silane Treatment produces a composite with high resistance of 274.47 Giga-ohms, which is significant for good insulating purpose.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82009117","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

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":null,"pages":null},"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":null,"pages":null},"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