Journal of Macromolecular Science Part A-Pure and Applied Chemistry最新文献

{"title":"New substituted pentazadienes as initiators of free-radical polymerization: synthesis, photochemical properties and perspectives for holographic media","authors":"Dmitry G. Vyshnevsky, Valeriia N. Ovdenko, Valeriy A. Pavlov, Liudmyla Yu Gryshchuk, Nikolay A. Davidenko, Alexander A. Ishchenko","doi":"10.1080/10601325.2023.2257741","DOIUrl":"https://doi.org/10.1080/10601325.2023.2257741","url":null,"abstract":"AbstractThe series of 4,4′-substituted 3-hydroxyethyl-pentaza-1,4-dienes were synthesized in the reaction of aromatic diazonium salts with an ethanol amine. Photolysis of pentaza-1,4-dienes was investigated by means of UV/Vis spectroscopy. Electron donating methyl and methoxy substituents were found to increase photosensitivity whereas electron withdrawing chloro-substituents cause higher photolytic stability. 3-hydroxyethyl-pentaza-1,4-dienes as a radical polymerization initiator has been successfully investigated in 10% methyl methacrylate solution in DMF. Gel permeation chromatography (GPC) and differential scanning calorimetry (DSC) were used for obtained polymers characteristics evaluation. The highest values of PMMA Mn and Đ can be obtained in the case of chloro-substituted derivative. The holograms of a plane wavefront were recorded in media based on obtained PMMA doped by azo-dye by a 532 nm laser in a ∼1-μm-thick sample. The diffraction efficiency values for parallel polarized acting light increased in Cl→Me→OMe series.Keywords: Azo dyesholographydiffraction efficiencyPMMAradical polymerization initiator Disclosure statementThere are no conflicts to declare.","PeriodicalId":50159,"journal":{"name":"Journal of Macromolecular Science Part A-Pure and Applied Chemistry","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136061248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of polyvinyl alcohol-based cationic hydrogels modified with gold nanoparticles as drug and gene delivery systems with enhanced antibacterial properties","authors":"İrem Simge Goregen, Ozgur Ozay","doi":"10.1080/10601325.2023.2258929","DOIUrl":"https://doi.org/10.1080/10601325.2023.2258929","url":null,"abstract":"AbstractIn this study, PVA/p(HEMA-co-MAPTAC) hydrogels were synthesized by redox polymerization using polyvinyl alcohol (PVA), 2-hydroxyethyl methacrylate (HEMA) and [3-(Methacryloylamino)propyl]trimethylammonium chloride (MAPTAC). In order to increase the antimicrobial activities of synthesized PVA/p(HEMA-co-MAPTAC) hydrogels, they were modified with Au nanoparticles. The swelling behavior of the synthesized hydrogels was investigated. Hydrogels were characterized by various techniques. The drug release studies of PVA/p(HEMA-co-MAPTAC) and PVA/p(HEMA-co-MAPTAC)@Au hydrogels were performed in PBS medium using Ribonucleic acid (RNA) as genetic material and sodium diclofenac (NaDc) as drug. It was determined that PVA/p(HEMA-co-MAPTAC) hydrogel held 91.5 mg/g RNA and 97.48 mg/g NaDc and released 28.32 mg/g RNA and 71.12 mg/g NaDc in PBS medium. Subsequently, PVA/p(HEMA-co-MAPTAC)@Au hydrogel adsorbed 87.46 mg/g RNA and 119.44 mg/g NaDc and released 18.96 mg/g RNA, 104.99 mg/g NaDc drug in PBS medium. Using the data obtained at the end of the release studies, the drug release kinetics of the hydrogels were examined. According to the Korsmeyer Peppas model, RNA release from hydrogels showed Fickian diffusion, while NaDc release showed non-Fickian diffusion behavior. The antibacterial and antifungal activities of the hydrogels were tested using gram-negative bacteria E. coli, gram-positive bacteria B. subtilis and a fungus species C. albicans.Keywords: Hydrogelpolyvinyl alcoholdrug releasegold nanoparticleantibacterial activity AcknowledgmentThis study includes a part of the master thesis of Irem Simge Goregen, and the authors thank Çanakkale Onsekiz Mart University Science and Technology Application and Research Center (COBILTUM) for analyses.Disclosure statementNo potential conflict of interest was reported by the authors.","PeriodicalId":50159,"journal":{"name":"Journal of Macromolecular Science Part A-Pure and Applied Chemistry","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136060597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Jeffamine cross-linked poly(vinyl chloride) films by sequential CuAAC click chemistry and aza-Michael addition","authors":"Cagatay Altinkok","doi":"10.1080/10601325.2023.2257769","DOIUrl":"https://doi.org/10.1080/10601325.2023.2257769","url":null,"abstract":"AbstractThe objective of this study is to present a promising route to design a series of new poly(vinyl chloride) (PVC) films cross-linked with polyetheramine (PEA), namely jeffamine, by combining copper (I)-catalyzed azide-alkyne cycloaddition “click” reaction (CuAAC) and aza-Michael addition (PVC-Jeffs). In the first step, the clickable azido‐functional PVC is prepared easily by displacement reaction between chlorine groups and sodium azide (PVC-N3) and then reacted with propargyl acrylate by CuAAC (PVC-acr). The second step is aza-Michael addition of PVC-acr and Jeffamine to achieve the desired PVC-Jeffs. Transparent and uniform films are prepared by casting from dichloromethane solvent. The effect of loading ratio by weight (PVC/Jeffamine (w/w) = 9:1; 8:2 and 7:3) on the thermal properties of final PVC-Jeffs is systematically explored. The chemical structure of PVC-Jeffs and their intermediates is characterized by Fourier transform infrared (FT-IR) and proton nuclear magnetic resonance (1H-NMR) spectroscopies, whereas thermal characteristics of the samples are investigated by thermogravimetric (TGA) and differential scanning calorimetry (DSC) analyses. The higher Jeffamine loaded PVC-Jeff exhibit enhanced thermostability and glass transition temperature with the Tg of 69.9 °C. Hence, this kind of strategy to achieve the PVC based films with good characteristics is expected to be applied in the preparation of biomedical materials.Keywords: aza-Michael additioncopper-catalyzed azide-alkyne cycloadditioncross-linked filmsJeffaminepoly(vinyl chloride) AcknowledgmentThe authors thank Denge Kimya for supplying the Jeffamine® ED-600.Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":50159,"journal":{"name":"Journal of Macromolecular Science Part A-Pure and Applied Chemistry","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136308098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High stretching tuned GO decorated non-shrinkable polyacrylic acid-based composite fiber and its excellent performance as a Fenton catalyst","authors":"Jinghong Wang, Jiayi Liu, Zeyan Wang, Nana Huang, Jiao Han, Naiku Xu, Jiahan Zhang, Xiangyuan Yan, Yaqi Li","doi":"10.1080/10601325.2023.2257738","DOIUrl":"https://doi.org/10.1080/10601325.2023.2257738","url":null,"abstract":"AbstractMixed valent iron ions were used to create a flexible ionic crosslinking network through coordination, making PAA fiber highly stretchable, and the fiber was highly stretched to tear graphene oxide (GO) sheets into discontinuously-dispersed monolayer sheets. The monolayer sheets could construct many hydrogen bonds with PAA chains to serve as knots to hinder chain movement, controlling the shrinkage of stretched fiber. Co-solvent formamide could improve the heat resistance of PAA fiber through special calorific effect; thus the highly-stretched fiber could tolerate high temperature heat setting. Due to the advanced structure induced by stretching, internal force relaxation caused by heat setting, and the existence of knots, the resulting fiber possessed the features of high strength and no shrinkage. High strength made the fiber mechanically applicable, and the unshrinkability could help it to maintain large specific surface area and strong iron ions-immobilizing capability. As a result, the catalytic activity of non-shrinkable fiber was increased by 25% compared with that of shrinkable fiber for methylene blue (MB) decolorization, and iron ion loading ratio was increased by 174.5%; however, iron ion leaching ratio was decreased by 76.5%, which was conducive to reusability improvement. Thereby, the resulting fiber could be repeatedly used to decolorize MB.Keywords: Dye wastewater treatmentfenton catalytic composite fibermulticomponent assistancepolyacrylic acidwet spinning AcknowledgmentsWe would like to thank the Analytical & Testing Center of Tiangong University for measurement work.Author contributionsJinghong Wang: Writing-original draft, Validation, Investigation, Data curation, Resources. Jiayi Liu: Investigation, Data curation. Zeyan Wang: Investigation, Data curation. Nana Huang: Investigation, Data curation. Jiao Han: Investigation, Data curation. Naiku Xu: Conceptualization, Methodology, Formal analysis, Writing-original draft, Project administration, Funding acquisition. Jiahan Zhang: Investigation, Data curation. Xiangyuan Yan: Investigation, Data curation. Yaqi Li: Investigation, Data curation.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe authors confirm that the data supporting the findings of this study are available within the article and its supplementary materials.Additional informationFundingThis work was support by the National Nature Science Foundation of China [grant number 51103099], the Tianjin Municipal Natural Science Foundation [grant number 12JCQNJC01600], the Research Fund for the Doctoral Program of Higher Education of China [grant number 20111201120002], and the China Postdoctoral Science Foundation [grant numbers 2014M550143, 2015T80221].","PeriodicalId":50159,"journal":{"name":"Journal of Macromolecular Science Part A-Pure and Applied Chemistry","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135397262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and properties of flame-retardant epoxy prepreg yarn for dry winding","authors":"Ming Li, Zhiwen Li, Jingzhu Han, Yi Wei, Wei Min, Ruize Gao, Zeyu Sun","doi":"10.1080/10601325.2023.2253838","DOIUrl":"https://doi.org/10.1080/10601325.2023.2253838","url":null,"abstract":"AbstractThe winding tension of the dry-wound forming process is uniform, the process is easy to control and the structure and performance of the prepared vehicle-mounted hydrogen composite pressure vessels are stable. Since the vehicle-mounted hydrogen pressure vessels must be subjected to rigorous fire experiments, the flame-retardant epoxy prepreg yarn technology is currently monopolized by foreign countries. The development of flame-retardant prepreg yarn with good processing properties is of great significance to the promotion and application of hydrogen pressure vessels. Here, a flame-retardant additive hexaphenoxy cyclotriphosphazene (HPCTP) was synthesized and dissolved in epoxy resin of prepreg yarn named P/N-EP. Then, the flame-retardant prepreg yarn was made by the solution impregnation method. Curing behavior, thermal analysis combustion behavior and mechanical properties of P/N-EP and tensile properties of flame-retardant prepreg yarn were investigated. Experimental results showed that the LOI value reached 36.4% at 10 phr and reached the V-0 level of the UL-94 test. The results about thermal stability of the P-N/EP resin system showed that with the increase of P-N content, T5% (temperature at 5% weight loss) and CY600 (carbon residue rate) both increased. The microstructure of carbon residue after UL-94 test was studied by electron microscope and laser Raman spectrometer. The results showed that with the increase of P-N content, the carbon layer structure became denser and the ID/IG decreased significantly, to achieve the flame-retardant effect by the condensed phase mechanism.Keywords: Flame-retardantepoxy prepreg yarndry windingmechanical properties Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by Jilin Province intelligent manufacturing major science and technology project (20210301004GX).","PeriodicalId":50159,"journal":{"name":"Journal of Macromolecular Science Part A-Pure and Applied Chemistry","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135878414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}