{"title":"单分散聚苯乙烯及其二元混合物的玻璃化转变温度。","authors":"Leo A Wall, Roestamsjah, Mary H Aldridge","doi":"10.6028/jres.078A.027","DOIUrl":null,"url":null,"abstract":"<p><p>Glass transition measurements on monodispersed polystyrenes of different molecular weight and their binary mixtures result in the following conclusions: (a) the effect of molecular weight on the glass transitions of monodispersed samples satisfies the Fox and Flory equation written as <i>T</i> <sub><i>g</i></sub> = <i>T</i> <sub><i>g</i>∞</sub> - <i>A</i>/<i>M</i> <sub><i>n</i></sub> , with constant <i>A</i> = 0.84 × 10<sup>-5</sup>; (b) polymers of the same number average molecular weight with a broad distribution show lower glass transitions than the monodispersed; (c) the binary mixtures follow the Gordon-Taylor equation derived for copolymers, with constant <i>k</i> (experimental) 0.5.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"78A 4","pages":"447-451"},"PeriodicalIF":0.0000,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6742816/pdf/jres-78A-447.pdf","citationCount":"16","resultStr":"{\"title\":\"The Glass Transition Temperature of Monodispersed Polystyrenes and Their Binary Mixtures.\",\"authors\":\"Leo A Wall, Roestamsjah, Mary H Aldridge\",\"doi\":\"10.6028/jres.078A.027\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Glass transition measurements on monodispersed polystyrenes of different molecular weight and their binary mixtures result in the following conclusions: (a) the effect of molecular weight on the glass transitions of monodispersed samples satisfies the Fox and Flory equation written as <i>T</i> <sub><i>g</i></sub> = <i>T</i> <sub><i>g</i>∞</sub> - <i>A</i>/<i>M</i> <sub><i>n</i></sub> , with constant <i>A</i> = 0.84 × 10<sup>-5</sup>; (b) polymers of the same number average molecular weight with a broad distribution show lower glass transitions than the monodispersed; (c) the binary mixtures follow the Gordon-Taylor equation derived for copolymers, with constant <i>k</i> (experimental) 0.5.</p>\",\"PeriodicalId\":17018,\"journal\":{\"name\":\"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry\",\"volume\":\"78A 4\",\"pages\":\"447-451\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1974-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6742816/pdf/jres-78A-447.pdf\",\"citationCount\":\"16\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.6028/jres.078A.027\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.6028/jres.078A.027","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 16
摘要
对不同分子量的单分散聚苯乙烯及其二元混合物进行玻璃化转变实验，得到以下结论:(a)分子量对单分散聚苯乙烯玻璃化转变的影响满足Fox和Flory方程，即T g = T g∞- a /M n，常数a = 0.84 × 10-5;(b)相同数目平均分子量且分布广泛的聚合物比单分散聚合物的玻璃化转变更低;(c)二元混合物遵循共聚物的Gordon-Taylor方程，常数k(实验)为0.5。
The Glass Transition Temperature of Monodispersed Polystyrenes and Their Binary Mixtures.
Glass transition measurements on monodispersed polystyrenes of different molecular weight and their binary mixtures result in the following conclusions: (a) the effect of molecular weight on the glass transitions of monodispersed samples satisfies the Fox and Flory equation written as Tg = Tg∞ - A/Mn , with constant A = 0.84 × 10-5; (b) polymers of the same number average molecular weight with a broad distribution show lower glass transitions than the monodispersed; (c) the binary mixtures follow the Gordon-Taylor equation derived for copolymers, with constant k (experimental) 0.5.
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