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

Preparation of green, mechanically strong and degradable CNF/PVA/SA composite aerogel 制备绿色、机械强度高且可降解的 CNF/PVA/SA 复合气凝胶

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-12-07 DOI: 10.1080/1023666x.2023.2283999

Lingyun Jia, Wenli Liu, Rong Fan, Wenxue Wang, Pengtao Liu

引用次数: 0

Mechanical and morphological investigation of laminated composite polymers depending on increasing vibration cycle 随着振动周期的增加，层合复合聚合物的力学和形态学研究

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-11-27 DOI: 10.1080/1023666x.2023.2283996

Uğur Kemiklioğlu

引用次数: 0

Methylene blue adsorption on vanadium pentoxide nanorods dispersed in starch-grafted polyacrylonitrile 淀粉接枝聚丙烯腈中分散的五氧化二钒纳米棒对亚甲基蓝的吸附

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-11-20 DOI: 10.1080/1023666x.2023.2274661

Ahmed Kangmennaa, Henritta Yakubu, Agnes Tutuwaa, Charity Ohemaa Agyapong, Mandela Toku, Eric Selorm Agorku

引用次数: 0

Dual modification of natural rubber/halloysite nanotubes composites by silane and maleated natural rubber 硅烷和马来化天然橡胶对天然橡胶/埃洛石纳米管复合材料的双重改性

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-11-16 DOI: 10.1080/1023666x.2023.2278234

Abdulhakim Masa, Nabil Hayeemasae

引用次数: 0

Assessment of thermal, crystalline and morphological properties of ellagic acid incorporated PVA, chitosan, PVA/chitosan and PVA/chitosan/gaur gum polymeric films 鞣花酸掺入聚乙烯醇、壳聚糖、聚乙烯醇/壳聚糖和聚乙烯醇/壳聚糖/白胶聚合物薄膜的热性能、结晶性能和形态性能评价

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-10-03 DOI: 10.1080/1023666X.2023.2270803

Vinayak N. Vanjeri , Vishram D. Hiremani , Naganagouda Goudar , Oshin Jacintha D’souza , Jennifer P. Pinto , Anilkumar R Patil , Shivayogi S. Narasagoudr , Saraswati P. Masti , Ravindra B. Chougale

{"title":"Assessment of thermal, crystalline and morphological properties of ellagic acid incorporated PVA, chitosan, PVA/chitosan and PVA/chitosan/gaur gum polymeric films","authors":"Vinayak N. Vanjeri , Vishram D. Hiremani , Naganagouda Goudar , Oshin Jacintha D’souza , Jennifer P. Pinto , Anilkumar R Patil , Shivayogi S. Narasagoudr , Saraswati P. Masti , Ravindra B. Chougale","doi":"10.1080/1023666X.2023.2270803","DOIUrl":"10.1080/1023666X.2023.2270803","url":null,"abstract":"<div><div>In the present study, the ellagic acid doped Polyvinyl alcohol (PVA), Chitosan (CS), PVA/CS and PVA/CS/Guar-gum blend films were prepared and coded as EA-1, EA-2, EA-3 and EA-4, respectively. The physicochemical properties of prepared films were analyzed by using different instrumental techniques. The differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) results revealed the good interaction and miscibility among the components of the films. The thermal stability of ellagic acid incorporated PVA film (EA-1) shown more thermal stability in contrast with other films confirmed by thermogravimetric analysis (TGA) analysis. From the results of X-ray diffraction (XRD) study, the increased amorphous nature was observed for the EA-3 and EA-4 films. Surface morphology was analyzed by using scanning electron microscopy (SEM) and atomic force microscopy (AFM) which illustrates that prepared films exhibits smooth and homogeneous surface after blending with ellagic acid. The results obtained by measuring water contact angles (WCA) revealed that all the films have hydrophilic nature. All the prepared films have exhibited good mechanical properties, hence prepared films can act as promising material for food packaging application.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 7","pages":"Pages 647-661"},"PeriodicalIF":1.7,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136376382","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

Fabrication of hydrolyzed keratin-modified rigid polyurethane foams and its thermal stability and combustion performance 水解角蛋白改性硬质聚氨酯泡沫的制备及其热稳定性和燃烧性能

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-10-03 DOI: 10.1080/1023666X.2023.2270805

Xu Zhang , Simiao Sun , Dehe Yuan , Zhi Wang , Hua Xie , Yinhua Liu

引用次数: 0

Development and application of gelatinized starches as wall materials for Lacticaseibacillus paracasei encapsulation 糊化淀粉作为副干酪乳杆菌包封壁材的开发与应用

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-10-03 DOI: 10.1080/1023666X.2023.2278864

Zaira Esmeralda Cabrera-Canales , Carlos Alberto Gómez-Aldapa , Javier Castro-Rosas , Luis Díaz-Batalla , Ricardo Omar Navarro-Cortez , Netzahualcoyol Calcáneo Martínez , Reyna Nallely Falfán-Cortés

{"title":"Development and application of gelatinized starches as wall materials for Lacticaseibacillus paracasei encapsulation","authors":"Zaira Esmeralda Cabrera-Canales , Carlos Alberto Gómez-Aldapa , Javier Castro-Rosas , Luis Díaz-Batalla , Ricardo Omar Navarro-Cortez , Netzahualcoyol Calcáneo Martínez , Reyna Nallely Falfán-Cortés","doi":"10.1080/1023666X.2023.2278864","DOIUrl":"10.1080/1023666X.2023.2278864","url":null,"abstract":"<div><div>The physical modification of starches by extrusion leads to changes in their physicochemical properties due to the conditions of the process, such as high temperatures and shear stress. These properties allow extruded starches to have important applications that have been scarcely explored. Therefore, the aim of this research was to physically modify starches from varied botanical sources (rice, potato, and corn) through extrusion and evaluate their application as encapsulating materials for probiotics. The modified starches showed that extrusion promoted granule structural disorganization and gelatinization. This, in turn, reduced pasting and thermal properties, so starches were viable for microencapsulation via spray drying. All starches evaluated and modified were adequate wall materials for microencapsulation of high concentrations (>9 Log CFU/g) of <em>Lacticaseibacillus paracasei</em>, lactic acid bacteria with probiotic potential.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 7","pages":"Pages 684-696"},"PeriodicalIF":1.7,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513849","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

UV resistance and biodegradation of PLA-based polymeric blends doped with PBS, PBAT, TPS 掺PBS、PBAT、TPS的聚乳酸基共混物的抗紫外性和生物降解性

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-24 DOI: 10.1080/1023666X.2023.2218696

Joanna Ludwiczak , Anna Dmitruk , Mateusz Skwarski , Paweł Kaczyński , Piotr Makuła

{"title":"UV resistance and biodegradation of PLA-based polymeric blends doped with PBS, PBAT, TPS","authors":"Joanna Ludwiczak , Anna Dmitruk , Mateusz Skwarski , Paweł Kaczyński , Piotr Makuła","doi":"10.1080/1023666X.2023.2218696","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2218696","url":null,"abstract":"<div><p>The design of new biodegradable polymers is important for solving the fossil resource and environmental pollution problems associated with conventional plastics. New PLA-based mixtures with the addition of PBAT, PBS and TPS, with different contents, were prepared to investigate their behavior after accelerated aging, as well as their potential for the biodegradation process. Their mechanical properties, mass, hardness, morphology, gloss and color change during UV irradiation progress, have been investigated. The samples were exposed to UV radiation for 21 d, their accelerated aging properties, were assessed weekly and compared with the non-aged samples. The degree of disintegration was determined after soil burial. The results showed that the mechanical properties, especially formability, as well as gloss and color, changed significantly after accelerated aging. All tested matrices are degradable, as shown by soil burial tests. Testing the stability of the functional properties of biodegradable plastics, which are assessed by end users, is important for the wider use of these plastics.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 4","pages":"Pages 366-382"},"PeriodicalIF":1.9,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49866706","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

Thermal stability and dynamic mechanical analysis of nano-biofillers blended hybrid composites reinforced by cellulosic Borassus flabellifer L. fiber 纤维素牛油果纤维增强纳米生物填料混纺复合材料的热稳定性及动态力学分析

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-18 DOI: 10.1080/1023666X.2023.2251792

Jitesh Kumar Singh , Arun Kumar Rout

{"title":"Thermal stability and dynamic mechanical analysis of nano-biofillers blended hybrid composites reinforced by cellulosic Borassus flabellifer L. fiber","authors":"Jitesh Kumar Singh , Arun Kumar Rout","doi":"10.1080/1023666X.2023.2251792","DOIUrl":"10.1080/1023666X.2023.2251792","url":null,"abstract":"<div><div>The aim of this study is to investigate the dynamic mechanical and thermal stability behavior of rice husk nano-biofillers blend epoxy hybrid composites reinforced by <em>Borassus flabellifer L.</em> leaf fiber. The raw <em>Borassus</em> leaf fibers were treated with 5 wt.% NaOH solution to reduce the disadvantages of hydroxyl bonding. Rice husk nano-fillers (RHNFs) were blended with epoxy resin to modify them with 0.25, 0.45, and 0.65 wt.%, respectively, using sonication and mechanical stirring process. The prepared samples were assessed to evaluate the thermal stability, maximum degradation temperature, storage modulus (<em>E′</em>), loss modulus (<em>E</em>″), damping factor (tan δ) and Cole–Cole plot of the composites. EDX spectroscopy was used to confirm the elemental composition of nano-biofillers. The morphology of RHNFs was analyzed using a scanning electron microscope (SEM). The TG analysis confirmed that the 0.45 wt.% RHNFs blended <em>Borassus</em> leaf fiber (BLF) composites exhibited superior thermal stability (371–384 °C). Derivative thermogravimetry (DTG) analysis exposed that the maximum mass-loss degradation temperature of 0.45 wt.% RHNFs blend composites was 411 °C for the first stage and 678 °C for the second stage, which were more than raw and RHNFs blend (0.25 and 0.65 wt.%) composites. Accordingly, improved <em>E′</em> (959.16–1637.75 MPa), glass transition temperature (<em>T</em> <sub>g</sub>) from <em>E″</em> (90.48–97.69 °C) and, <em>T</em> <sub>g</sub> from tan δ (103.35–109.67 °C) were derived from the modified composites. Owing to the improved dispersion of the nano-filler, the 0.45 wt.% RHNFs blend composites had a homogeneous polymer system, as verified by the Cole–Cole diagram. The analyzed composites are to be used with versatile functionality for their intended purpose.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 6","pages":"Pages 552-563"},"PeriodicalIF":1.7,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85494093","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

Eliciting impact of nano-clay reinforcement and processing schemes on polyurethane chain dynamics by gold sputtering patterns (GSPs) 利用金溅射模式(GSPs)研究纳米粘土增强和加工方案对聚氨酯链动力学的影响

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-18 DOI: 10.1080/1023666X.2023.2255024

Mohammad Babar , Gaurav Verma

{"title":"Eliciting impact of nano-clay reinforcement and processing schemes on polyurethane chain dynamics by gold sputtering patterns (GSPs)","authors":"Mohammad Babar , Gaurav Verma","doi":"10.1080/1023666X.2023.2255024","DOIUrl":"10.1080/1023666X.2023.2255024","url":null,"abstract":"<div><div>This article narrates how processing “bias” affects polymer chain dynamics due to variable 2D-nanofiller interfaces. Importance of this biasing can be assessed by the significant improvement in thermal and mechanical properties we have recently published for polyurethane-2D clay nanocomposite coatings. We intricately look at the nanoscale structure and subsequent interface formation between 2D clay and PU chains to understand the changes in morphology. Polyurethane (PU) chain dynamics was observed through the gold (Au) sputtered patterns in field emission electron microscopy (FESEM) images. These were fitted with circles and our findings confirm the presence of an attractive interface between PU and 2D nanoclay. Circle fitting elicits important data like the critical area ( <span><span><span><math><mrow><msub><mrow><mi>A</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span></span></span> ) and critical relative frequency ( <span><span><span><math><mrow><msub><mrow><mi>f</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span></span></span> ) which are used to evaluate the polymer chain dynamics and morphology. We find that <span><span><span><math><mrow><msub><mrow><mi>f</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow><mi></mi></math></span></span></span> is related to <em>circularity</em>, and reinforcing nanoclay to the PU matrix enhances <span><span><span><math><mrow><msub><mrow><mi>f</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span></span></span> by 4.6% and 6.9% with simultaneous use of ultrasonic bath and high shear homogenizer. This is further correlated with the already established methods of small angle X-Ray scattering (SAXS) and Fourier transform infrared (FTIR) spectroscopy to generate a fresh perspective on interfacial interactions in PU-2D clay nanocomposites.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 6","pages":"Pages 581-595"},"PeriodicalIF":1.7,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135817818","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