Copolymers of [ 2 -( acryloyloxy ) ethyl ] trimethylammonium chloride ( AETAC ) and acrylamide ( AAm ) having weight - average molecular weights ( M w ’ s ) exceeding 10 million were analyzed by di ff usion - ordered two - dimensional spectroscopy ( DOSY ) using high fi eld - gradients ( ≤ 13T / m ) . Distribution curves of the self - di ff usion coe ffi cient D ) were successfully obtained for the copolymers, and the D values at the peak top ( D p ’ s ) correlated well with M w as D p = ( 1.86 × 10 ¹ 8 ) × M w – 0.749 . The distributions of D agreed fairly well with those determined by dynamic light scattering. The DOSYanalysis revealed the molecular weight dependence of the chemical composition of the copolymers; the relative AETAC content increased with decreasing molecular weight.
采用高场梯度(≤13T / M)的扩散有序二维光谱(DOSY)分析了[2 -(丙烯氧基)乙基]三甲基氯化铵(AETAC)与丙烯酰胺(AAm)的共聚物，其平均分子量(mw)超过1000万。得到了共聚物的自扩散系数D的分布曲线，峰顶的D值(p′s)与M w的相关性良好，p = (1.86 × 10¹8)× M w - 0.749。D的分布与动态光散射的结果相当吻合。DOSYanalysis揭示了共聚物的化学组成对分子量的依赖性;AETAC的相对含量随分子量的减小而增加。
{"title":"Characterization of High Molecular Weight Acrylamide-Based Copolymers by DOSY-NMR Using High Field-Gradients","authors":"Kazuya Watanabe, K. Ute","doi":"10.1295/KORON.2018-0005","DOIUrl":"https://doi.org/10.1295/KORON.2018-0005","url":null,"abstract":"Copolymers of [ 2 -( acryloyloxy ) ethyl ] trimethylammonium chloride ( AETAC ) and acrylamide ( AAm ) having weight - average molecular weights ( M w ’ s ) exceeding 10 million were analyzed by di ff usion - ordered two - dimensional spectroscopy ( DOSY ) using high fi eld - gradients ( ≤ 13T / m ) . Distribution curves of the self - di ff usion coe ffi cient D ) were successfully obtained for the copolymers, and the D values at the peak top ( D p ’ s ) correlated well with M w as D p = ( 1.86 × 10 ¹ 8 ) × M w – 0.749 . The distributions of D agreed fairly well with those determined by dynamic light scattering. The DOSYanalysis revealed the molecular weight dependence of the chemical composition of the copolymers; the relative AETAC content increased with decreasing molecular weight.","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78117780","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}
Kazuki Sugimura, K. Tsuda, Hiroyuki Arakawa, K. Seike, Yoshiharu Miyashita, Yoshikuni Teramoto, Y. Nishio
{"title":"Thermal Transition Behavior of Liquid-Crystalline Cholesterol Derivative/Aliphatic Amine Complexes and Enthalpy Relaxation Characteristics in Their Glassy State","authors":"Kazuki Sugimura, K. Tsuda, Hiroyuki Arakawa, K. Seike, Yoshiharu Miyashita, Yoshikuni Teramoto, Y. Nishio","doi":"10.1295/KORON.2018-0007","DOIUrl":"https://doi.org/10.1295/KORON.2018-0007","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87160893","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":"Measuring the Temperature and Humidity Dependence of Gas Diffusivity in Building Coatings by Using a Using Thermal Desorption System","authors":"R. Kitagaki","doi":"10.1295/koron.2018-0001","DOIUrl":"https://doi.org/10.1295/koron.2018-0001","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77629008","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}
R. Iwabuchi, Daisuke Nagai, M. Yoneyama, H. Uehara, T. Yamanobe, M. Manaka
{"title":"Effect of Kneading and Composition on the Structure and Physical Properties of EPDM/PP Thermoplastic Elastomer","authors":"R. Iwabuchi, Daisuke Nagai, M. Yoneyama, H. Uehara, T. Yamanobe, M. Manaka","doi":"10.1295/KORON.2017-0084","DOIUrl":"https://doi.org/10.1295/KORON.2017-0084","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76336465","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}
Static light scattering, dynamic light scattering, and small - angle X - ray scattering are powerful tools to analyze structures of various polymer assemblies formed in solution. In this article, we brie fl y explain those experimental techniques along with their historical background, and review their applications to the following polymer solution systems: ( 1 ) associating homopolymer solutions, ( 2 ) aqueous solutions of the polyanion – polycation mixture forming polyion complex colloids, ( 3 ) block copolymer solutions forming polymer micelles of various morphologies, ( 4 ) aqueous solutions of amphiphilic random and alternating copolymers forming the fl ower micelle or fl ower necklace, and ( 5 ) aqueous solutions of the globular protein – surfactant mixture. Di ff erent scattering techniques are combined with other experimental and theoretical methods to provide more detailed structural information.
{"title":"Structural Studies of Polymer Nano-Assemblies in Solution by Scattering Techniques","authors":"Takahiro Sato, Yan Li","doi":"10.1295/KORON.2018-0003","DOIUrl":"https://doi.org/10.1295/KORON.2018-0003","url":null,"abstract":"Static light scattering, dynamic light scattering, and small - angle X - ray scattering are powerful tools to analyze structures of various polymer assemblies formed in solution. In this article, we brie fl y explain those experimental techniques along with their historical background, and review their applications to the following polymer solution systems: ( 1 ) associating homopolymer solutions, ( 2 ) aqueous solutions of the polyanion – polycation mixture forming polyion complex colloids, ( 3 ) block copolymer solutions forming polymer micelles of various morphologies, ( 4 ) aqueous solutions of amphiphilic random and alternating copolymers forming the fl ower micelle or fl ower necklace, and ( 5 ) aqueous solutions of the globular protein – surfactant mixture. Di ff erent scattering techniques are combined with other experimental and theoretical methods to provide more detailed structural information.","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82929166","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":"Temperature Dependent Photodegradation on Urethane Coatings for Building Materials in a Low Relative Humidity Environment","authors":"Takato Ishida, R. Kitagaki","doi":"10.1295/KORON.2017-0082","DOIUrl":"https://doi.org/10.1295/KORON.2017-0082","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72687525","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":"Analysis of the Effects of Carbon Allotropes on the Pyrolysis of Polymers by Pyrolysis-Gas Chromatography/Mass Spectrometry","authors":"Y. Nagai, Y. Kamiya, Takayuki Honda","doi":"10.1295/KORON.2017-0085","DOIUrl":"https://doi.org/10.1295/KORON.2017-0085","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397097","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":"Influence of Tetrahydrofuran and Alumina Nanoparticle Interface on the Structure of Syndiotactic Poly(methyl methacrylate)","authors":"K. Matsuura, Y. Matsuda, S. Tasaka","doi":"10.1295/KORON.2017-0083","DOIUrl":"https://doi.org/10.1295/KORON.2017-0083","url":null,"abstract":"","PeriodicalId":17878,"journal":{"name":"Kobunshi Ronbunshu","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86293689","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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