A. Nowaki, H. Ota, Takafumi Ouchi, Kentaro Matsumoto, Chi Hoong Chan, H. Nishida
{"title":"Surface Properties of Micro Whiskers from Superheated Steam Treated Bamboo and Antistatic Properties of Composites with Polypropylene","authors":"A. Nowaki, H. Ota, Takafumi Ouchi, Kentaro Matsumoto, Chi Hoong Chan, H. Nishida","doi":"10.1295/KORON.2018-0038","DOIUrl":"https://doi.org/10.1295/KORON.2018-0038","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81037952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Polyethylene ( PE ) is known as the typical plastic whose surface properties are very dif fi cult to modify and it is believed that it is impossible to modify the surface properties chemically. However, recently, Yao had clearly shown that side chain crystalline block copolymer ( SCCBC ) has an ability to modify the PE surface property chemically. In this study, by using the SCCBC, we had tried to stain the very high molecular weight PE fi ber that is known to be the most dif fi cult product with respect to modifying the surface property, not only chemically but also physically. From the results, the high molecular weight PE fi ber can be dyed by using the SCCBC and it had shown very high durability. This study shows that the application area of SCCBC is very wide and useful.
{"title":"Staining Characteristics of Polyethylene Fiber with Side Chain Crystalline Block Copolymer","authors":"S. Ishimoto, S. Hirai, H. Obuchi, Shigeru Yao","doi":"10.1295/KORON.2018-0041","DOIUrl":"https://doi.org/10.1295/KORON.2018-0041","url":null,"abstract":"Polyethylene ( PE ) is known as the typical plastic whose surface properties are very dif fi cult to modify and it is believed that it is impossible to modify the surface properties chemically. However, recently, Yao had clearly shown that side chain crystalline block copolymer ( SCCBC ) has an ability to modify the PE surface property chemically. In this study, by using the SCCBC, we had tried to stain the very high molecular weight PE fi ber that is known to be the most dif fi cult product with respect to modifying the surface property, not only chemically but also physically. From the results, the high molecular weight PE fi ber can be dyed by using the SCCBC and it had shown very high durability. This study shows that the application area of SCCBC is very wide and useful.","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79892629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Hashidzume, Y. Mitsukami, S. Yusa, Y. Morishima
{"title":"Fern-Leaf Morphology Formed from an Amphiphilic Polycation Block Copolymer in the Presence of Sodium Chloride","authors":"A. Hashidzume, Y. Mitsukami, S. Yusa, Y. Morishima","doi":"10.1295/KORON.2018-0039","DOIUrl":"https://doi.org/10.1295/KORON.2018-0039","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88416142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
. To develop an epoxy resin having a high glass transition temperature and heat resistance, copolymerization of an epoxy group - containing vinyl ether and a maleimide derivative was carried out. Radical copolymerization of 2 - vinyloxyethylglycidyl ether ( VEGE ) and N - phenylmaleimide ( NPMI ) with AIBN were carried out in benzene or THF to give polymers having a molecular weight of 120,000 to 250,000 ( in case of benzene ) and a molecular weight of about 6,000 ( in case of THF ) in high yield, respectively. On the other hand, the copolymerization in the absence of AIBN hardly progressed in benzene, but in THF the polymers with a molecular weight of about 5,000 were obtained in high yield. 1 H NMR spectroscopy showed that the structure of the products is a copolymer composed of VEGE units and NPMI units. MALDI - TOF - MS spectroscopy revealed that the VEGE units and NPMI units are arranged mainly in an alternative manner. The glass transition temperature ( T g ) of the copolymers greatly varied depending on the copolymer composition and remarkably increased as the content of NPMI units increased. The thermal decomposition temperature ( T d ) of the copolymers was about 300 ° C or higher depending on the content NPMI units. By curing the reactive epoxy groups in the copolymers with multifunctional aromatic amines, novel heat - resistant epoxy cured resins with high T g were obtained.
{"title":"Synthesis and Properties of Novel Epoxy Resins by Radical Copolymerization of 2-Vinyloxyethyl Glycidyl Ether and N-Phenylmaleimide","authors":"Michio Urushisaki, T. Hashimoto, T. Sakaguchi","doi":"10.1295/KORON.2018-0042","DOIUrl":"https://doi.org/10.1295/KORON.2018-0042","url":null,"abstract":". To develop an epoxy resin having a high glass transition temperature and heat resistance, copolymerization of an epoxy group - containing vinyl ether and a maleimide derivative was carried out. Radical copolymerization of 2 - vinyloxyethylglycidyl ether ( VEGE ) and N - phenylmaleimide ( NPMI ) with AIBN were carried out in benzene or THF to give polymers having a molecular weight of 120,000 to 250,000 ( in case of benzene ) and a molecular weight of about 6,000 ( in case of THF ) in high yield, respectively. On the other hand, the copolymerization in the absence of AIBN hardly progressed in benzene, but in THF the polymers with a molecular weight of about 5,000 were obtained in high yield. 1 H NMR spectroscopy showed that the structure of the products is a copolymer composed of VEGE units and NPMI units. MALDI - TOF - MS spectroscopy revealed that the VEGE units and NPMI units are arranged mainly in an alternative manner. The glass transition temperature ( T g ) of the copolymers greatly varied depending on the copolymer composition and remarkably increased as the content of NPMI units increased. The thermal decomposition temperature ( T d ) of the copolymers was about 300 ° C or higher depending on the content NPMI units. By curing the reactive epoxy groups in the copolymers with multifunctional aromatic amines, novel heat - resistant epoxy cured resins with high T g were obtained.","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82925404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Exothermic Behavior of Cyanine Dye-Containing Polymer Micelle Irradiated by Near Infrared (NIR) in Water","authors":"K. Shiraishi, K. Ishihara, S. Yusa","doi":"10.1295/KORON.2018-0040","DOIUrl":"https://doi.org/10.1295/KORON.2018-0040","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85956762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Masaki Kinoshita, Daisuke Kugimoto, Kosuke Morimoto, Kazuyuki Ito, Kengo Tsuboi, S. Kanazawa, I. Akiba
pH - triggered structural change of polymer micelles composed of poly ( methacrylic acid )- block - poly ( 2 - bromethyl methacrylate ) ( PMAA - b PBrEMA ) was investigated with anomalous small - angle X - ray scattering ( ASAXS ) near the Br K edge. ASAXS revealed that the size of the hydrophobic core and the aggregation number of PMAA - b - PBrEMA micelles drastically decreased with an increase in the pH from 4.8 to 12.5. It was concluded that the drastic reduction of the size of PMAA - b - PBrEMA micelles in alkaline conditions was caused by the reduced electrostatic repulsion between anionic PAA chains in the corona layer of the micelles.
用异常小角X射线散射(ASAXS)研究了pH触发的聚甲基丙烯酸-嵌段-聚2 -溴甲基丙烯酸甲酯(PMAA - b prema)聚合物胶束结构变化。ASAXS显示，当pH值从4.8增加到12.5时，PMAA - b - prema胶束的聚集数量和疏水核的大小急剧减少。在碱性条件下，PMAA - b - prema胶束尺寸的急剧减小是由于胶束电晕层中阴离子PAA链之间的静电斥力减小所致。
{"title":"Study on the Anomalous Small-Angle X-Ray Scattering on Structural Change in pH-Responsive Polymer Micelles","authors":"Masaki Kinoshita, Daisuke Kugimoto, Kosuke Morimoto, Kazuyuki Ito, Kengo Tsuboi, S. Kanazawa, I. Akiba","doi":"10.1295/KORON.2018-0046","DOIUrl":"https://doi.org/10.1295/KORON.2018-0046","url":null,"abstract":"pH - triggered structural change of polymer micelles composed of poly ( methacrylic acid )- block - poly ( 2 - bromethyl methacrylate ) ( PMAA - b PBrEMA ) was investigated with anomalous small - angle X - ray scattering ( ASAXS ) near the Br K edge. ASAXS revealed that the size of the hydrophobic core and the aggregation number of PMAA - b - PBrEMA micelles drastically decreased with an increase in the pH from 4.8 to 12.5. It was concluded that the drastic reduction of the size of PMAA - b - PBrEMA micelles in alkaline conditions was caused by the reduced electrostatic repulsion between anionic PAA chains in the corona layer of the micelles.","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75874213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and Pseudo-Living Addition-Condensation Polymerization of Structure-Controlled Polymers of 1-Methylpyrrole and Various Aldehydes","authors":"Hao Guo, Keisuke Yoshida, Hiroyuki Aota","doi":"10.1295/KORON.2018-0043","DOIUrl":"https://doi.org/10.1295/KORON.2018-0043","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74668930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Kinetics of Block Copolymer Micelles Formed in Solution","authors":"Takahiro Sato, Rintaro Takahashi","doi":"10.1295/KORON.2018-0052","DOIUrl":"https://doi.org/10.1295/KORON.2018-0052","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79765612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Lower Temperature Synthesis of Polymer Network from Liquid-Crystalline Polyesters with Titanium Alkoxide Catalysts","authors":"K. Hiraoka, Yu Iwakabe, Kazumi Yamada, M. Oshima","doi":"10.1295/KORON.2018-0036","DOIUrl":"https://doi.org/10.1295/KORON.2018-0036","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83791331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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