Carmen Fernández-Monreal, M. Sánchez-Chaves, G. Martínez, E. Madruga
{"title":"在N,N ' -二甲基甲酰胺溶液中获得的2‐甲基丙烯酸羟乙酯/苯乙烯共聚物的立体化学构型","authors":"Carmen Fernández-Monreal, M. Sánchez-Chaves, G. Martínez, E. Madruga","doi":"10.1002/(SICI)1521-4044(19991201)50:11/12<408::AID-APOL408>3.0.CO;2-6","DOIUrl":null,"url":null,"abstract":"High resolution 1 H-NMR spectra of 2-hydroxyethyl methacrylate (HEMA)-styrene (S) copolymers prepared at low conversion by free radical copolymerization in N,N-dimethylformamide (DMF) solution at 50°C, have been analyzed in terms of sequence distribution and stereoregularity. The Bootstrap effect for the HEMA/S/DMF system was confirmed by comparison of the data obtained with those previously reported for the HEMA/S/bulk system. Reactivity ratios, statistical parameters, and the coisotacticity parameter σ HS = 0.40, estimated at low conversion, were used to describe the observed experimental changes in copolymer composition and triad fraction intensities over a wide range of conversions.","PeriodicalId":7162,"journal":{"name":"Acta Polymerica","volume":"27 1","pages":"408-412"},"PeriodicalIF":0.0000,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":"{\"title\":\"Stereochemical configuration of 2‐hydroxyethyl methacrylate/styrene copolymers obtained in N,N′‐dimethylformamide solution over a whole range of conversion\",\"authors\":\"Carmen Fernández-Monreal, M. Sánchez-Chaves, G. Martínez, E. Madruga\",\"doi\":\"10.1002/(SICI)1521-4044(19991201)50:11/12<408::AID-APOL408>3.0.CO;2-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"High resolution 1 H-NMR spectra of 2-hydroxyethyl methacrylate (HEMA)-styrene (S) copolymers prepared at low conversion by free radical copolymerization in N,N-dimethylformamide (DMF) solution at 50°C, have been analyzed in terms of sequence distribution and stereoregularity. The Bootstrap effect for the HEMA/S/DMF system was confirmed by comparison of the data obtained with those previously reported for the HEMA/S/bulk system. Reactivity ratios, statistical parameters, and the coisotacticity parameter σ HS = 0.40, estimated at low conversion, were used to describe the observed experimental changes in copolymer composition and triad fraction intensities over a wide range of conversions.\",\"PeriodicalId\":7162,\"journal\":{\"name\":\"Acta Polymerica\",\"volume\":\"27 1\",\"pages\":\"408-412\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Polymerica\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/(SICI)1521-4044(19991201)50:11/12<408::AID-APOL408>3.0.CO;2-6\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Polymerica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/(SICI)1521-4044(19991201)50:11/12<408::AID-APOL408>3.0.CO;2-6","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Stereochemical configuration of 2‐hydroxyethyl methacrylate/styrene copolymers obtained in N,N′‐dimethylformamide solution over a whole range of conversion
High resolution 1 H-NMR spectra of 2-hydroxyethyl methacrylate (HEMA)-styrene (S) copolymers prepared at low conversion by free radical copolymerization in N,N-dimethylformamide (DMF) solution at 50°C, have been analyzed in terms of sequence distribution and stereoregularity. The Bootstrap effect for the HEMA/S/DMF system was confirmed by comparison of the data obtained with those previously reported for the HEMA/S/bulk system. Reactivity ratios, statistical parameters, and the coisotacticity parameter σ HS = 0.40, estimated at low conversion, were used to describe the observed experimental changes in copolymer composition and triad fraction intensities over a wide range of conversions.
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