International Journal of Polymer Analysis and Characterization最新文献

{"title":"Methylene blue adsorption on vanadium pentoxide nanorods dispersed in starch-grafted polyacrylonitrile","authors":"Ahmed Kangmennaa, Henritta Yakubu, Agnes Tutuwaa, Charity Ohemaa Agyapong, Mandela Toku, Eric Selorm Agorku","doi":"10.1080/1023666x.2023.2274661","DOIUrl":"https://doi.org/10.1080/1023666x.2023.2274661","url":null,"abstract":"A brand-new vanadium pentoxide (V2O5) functionalized starch (St) grafted poly(acrylonitrile) (PAN) adsorbent was synthesized via microwave-assisted graft polymerization method to remove methylene b...","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513847","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}

{"title":"Dual modification of natural rubber/halloysite nanotubes composites by silane and maleated natural rubber","authors":"Abdulhakim Masa, Nabil Hayeemasae","doi":"10.1080/1023666x.2023.2278234","DOIUrl":"https://doi.org/10.1080/1023666x.2023.2278234","url":null,"abstract":"As the performance of natural rubber (NR) and halloysite nanotube (HNT) composites is uncertain due to low compatibility between the materials, malleated natural rubber (MNR) is then used as a comp...","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513848","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}

{"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":"https://doi.org/10.1080/1023666x.2023.2270803","url":null,"abstract":"AbstractIn 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.Keywords: Polyvinyl alcoholchitosanguargumellagic acidblend films AcknowledgmentsThe authors gratefully acknowledge the facilities provided by University Science Instruments Center (USIC), DST-SAIF and DST PURSE- Phase II Programme, Karnatak University, Dharwad, Karnataka, India, also Dr. Saraswati P Masti Principal investigator DST-SERB Project, No. SB/EMEQ-213/2014, Department of Chemistry, Karnatak Univesity’s, Karnatak Science College, Dharwad, Karnataka, India, for their support to this study.Author contributionAll the authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Vinayak N. Vanjeri, Vishram D. Hiremani, Naganagouda Goudar, Oshin D’souza, Jennifer P. Pinto, Anilkumar R Patil, Shivayogi S. Narasagoudr, Saraswati P. Masti, Ravindra B. Chougale. The first draft of the manuscript was written by Vinayak Vanjeri and all the authors commented on previous version of the manuscript. All authors read and approved the final manuscript.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementAll data generated or analyzed during this study are included in the article.Additional informationFundingThe authors declare that no funds, grants, or other support were received during the preparation of this manuscript.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","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}

{"title":"Fabrication of hydrolyzed keratin-modified rigid polyurethane foams and its thermal stability and combustion performance","authors":"Xu Zhang, Simiao Sun, Dehe Yuan, Zhi Wang, Hua Xie, Yinhua Liu","doi":"10.1080/1023666x.2023.2270805","DOIUrl":"https://doi.org/10.1080/1023666x.2023.2270805","url":null,"abstract":"AbstractRigid polyurethane foams (RPUFs) were synthesized with hydrolyzed keratin using the “one-step method” of all-water foaming. Thermogravimetric analysis, pyrolysis kinetics analysis, cone calorimetry and smoke density (Ds) were used to investigate the effects of hydrolyzed keratin on thermal stability and combustion performance of RPUFs. The results showed that the modified RPUFs with 12.5 wt% hydrolyzed keratin (RPUF-HK5) had the lowest mass loss, the highest integrated program pyrolysis temperature, the highest activation energy, the lowest Ds (25.32 and 22.57), the highest light transmittance (64.30% and 67.46%), and total heat release (1.85 MJ/m2, 2.18 MJ/m2 and 2.92 MJ/m2), which indicated that RPUF-HK5 had better thermal stability and combustion performance. The current research results provided a useful reference for the preparation of the RPUFs with good thermal stability by bio-based modification.Keywords: Polyurethane foamhydrolyzed keratincombustion performancethermal stability Disclosure statementWe declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work, there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled.Data availability statementData available on request from the authors. The data that support the findings of this study are available from the corresponding author upon reasonable request.Additional informationFundingThe financial support from Scientific Research Fund of Liaoning Provincial Education Department [Grant No. JYT2020011) is greatly acknowledged.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136376521","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}

{"title":"A study on surfactant modified polypyrrole nanostructures and its applications in supercapacitors","authors":"Neelima Dubey","doi":"10.1080/1023666x.2023.2267257","DOIUrl":"https://doi.org/10.1080/1023666x.2023.2267257","url":null,"abstract":"","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135570898","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}

{"title":"Thermal decomposition kinetic study on one-pack formulations of epoxy resin cured with novel phosphorus-containing flame retardant latent curing agents","authors":"J. Kamalipour, M. H. Beheshty, M. J. Zohuriaan-Mehr","doi":"10.1080/1023666x.2023.2264604","DOIUrl":"https://doi.org/10.1080/1023666x.2023.2264604","url":null,"abstract":"AbstractSeveral phosphorous-containing flame retardant latent curing agents newly derived from 4,4-diamino diphenyl sulfone (DDS) and 4,4-diamino diphenyl methane (DDM) were designed to cure epoxy resin alongside dicyandiamide (Dicy). The thermal decomposition and kinetics of cured one-packed systems were investigated in detail. The epoxy systems were studied under a nitrogen atmosphere by using thermal gravimetric analysis at different heating rates. The kinetics of thermal decomposition was evaluated by Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose, and Starink methods. The correlation coefficient for all systems obtained by the three above methods was almost equal to one, indicating that these three methods were correctly chosen. The results demonstrated that the activation energy of epoxy/Dicy blended with different phosphorous-containing DDS- and DDM-derived curing agents at a lower degree of conversion decreased by incorporation of the agents while increasing at a higher degree of conversion. The thermodynamic parameters (ΔH*, ΔG*, and ΔS*) of the studied systems were calculated by the obtained activation energy via three kinetics methods. It was found that as the conversion degree and the enthalpy increased, the Gibbs free energy decreased, while entropy changed from negative to positive values.Keywords: Epoxy resinflame retardantdicyandiamideFlynn-Wall-OzawaKissinger-Akahira-SunoseStarinkthermodynamic parameters Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883687","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}

{"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":"https://doi.org/10.1080/1023666x.2023.2255024","url":null,"abstract":"AbstractThis 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 (Ac) and critical relative frequency (fc) which are used to evaluate the polymer chain dynamics and morphology. We find that fc is related to circularity, and reinforcing nanoclay to the PU matrix enhances fc 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.Circle fitting treatment FESEM images of polyurethane (PU) nanocomposites. Difference in the gold sputtering patterns (GSPs) of PU on the surface of nanoclay (below) can be clearly observed as compared to the GSPs of bare PU (above).Highlights1 wt% C30B-PU nanocomposite coatings were prepared using 3 processing schemes.FESEM images revealed gold sputtered patterns from the differently processed samples.Circle fitting analysis on GSPs helped in understanding the polymer nanofiller interface.Growth conformation of polymer chains in and around the 2D nanofiller provides fresh perspective into polymer chain dynamics.Keywords: Chain mobilitypolymer conformationattractive interfacereorganizationFESEMdegree of phase separation (DPS)gold sputtering patterns (GSPs)circularity AcknowledgmentsThe authors thank Covestro (India) Private Limited for providing us with the necessary materials on- gratis.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe data that support the findings of this study are available from the corresponding author upon reasonable request.Additional informationFundingWe acknowledge the contribution of SAP (UGC, New Delhi), PURSE (DST, New Delhi) and TEQIP-III grants accorded to Dr. SSBUICET. We acknowledge the financial assistance given by DST-UT (S&T&RE/RP/147/Sanc/09/2017/1123-1129) and DRDO (DMSDE Kanpur) (TR/0569/CARS-130 dated 16/12/2021). We acknowledge the receiving of collaborative grant from Nottingham Trent University (NTU), United Kingdom under the science and technology initiative.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","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}

{"title":"Development and characterization of DGEBA-APTES-ZrO₂ nanocomposite coatings for anti-corrosion and anti-fouling","authors":"Saravanan P, Anandkumar S, Sharmila J, Chamundeeswari M, Suresh S, Nisha P","doi":"10.1080/1023666x.2023.2254034","DOIUrl":"https://doi.org/10.1080/1023666x.2023.2254034","url":null,"abstract":"Abstract Tetraethylenetetramine (TETA), 3-aminopropylethoxysilane-treated ZrO2 nanoparticles, and diglycidyl ethers of bisphenol-A (DGEBA) were used to create an epoxy nanocomposite (DGEBA-APTES-ZrO2). The newly synthesized APTES-ZrO2 was evaluated using FTIR, XRD, SEM, AFM, TEM and elemental analysis for structural and compositional analysis. Due to its resilience in acidic, basic and saline conditions, mild steel is crucial in sectors like shipbuilding and the automobile industry. ZrO2 nanoparticles have excellent corrosion resistance. As a result, it is intended to prepare DGEBA-APTES-ZrO2 for a barrier layer that prevents corrosion on mild steel surfaces. FTIR spectroscopy tests provided proof of DGEBA-APTES-ZrO2-coated mild steel’s ability to limit corrosion and microbiological growth. Using salt spray and an electrochemical impedance technique, corrosion inhibition was evaluated. On mild steel surfaces, DGEBA-APTES-ZrO2 nanohybrid coatings demonstrated excellent corrosion prevention and antifouling.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135980927","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}

{"title":"UV resistance and biodegradation of PLA-based polymeric blends doped with PBS, PBAT, TPS","authors":"Joanna Ludwiczak ,&nbsp;Anna Dmitruk ,&nbsp;Mateusz Skwarski ,&nbsp;Paweł Kaczyński ,&nbsp;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":null,"pages":null},"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}

{"title":"Thermal stability and dynamic mechanical analysis of nano-biofillers blended hybrid composites reinforced by cellulosic Borassus flabellifer L. fiber","authors":"Jitesh Kumar Singh, A. Rout","doi":"10.1080/1023666X.2023.2251792","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2251792","url":null,"abstract":"Abstract 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 Borassus flabellifer L. leaf fiber. The raw Borassus 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 (E′), loss modulus (E″), 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 Borassus 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 E′ (959.16–1637.75 MPa), glass transition temperature (T g) from E″ (90.48–97.69 °C) and, T g 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.","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":null,"pages":null},"PeriodicalIF":1.9,"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}