{"title":"分子量对热致性无规共聚物结晶结构的影响","authors":"R. Spontak","doi":"10.1002/POL.1990.140280901","DOIUrl":null,"url":null,"abstract":"The characteristics of thermotropic liquid crystalline p-oxybenzoate/2,6-oxynaphtoate copolymers of similar composition with degrees of polymerization in the range of 25-150 were studied by TEM. Measurement of the crystallite dimensions shows that the thickness is not a strong function of the DP, whereas the length appears to become a linear function of DP when DP≥65. The breadth of each L c distribution also decreases with DP, suggesting more uniform crystallites are present in high molecular weight polymers","PeriodicalId":16874,"journal":{"name":"Journal of Polymer Science: Polymer Letters Edition","volume":"27 1","pages":"271-278"},"PeriodicalIF":0.0000,"publicationDate":"1990-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Effect of molecular weight on crystalline structure in thermotropic random copolymers\",\"authors\":\"R. Spontak\",\"doi\":\"10.1002/POL.1990.140280901\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The characteristics of thermotropic liquid crystalline p-oxybenzoate/2,6-oxynaphtoate copolymers of similar composition with degrees of polymerization in the range of 25-150 were studied by TEM. Measurement of the crystallite dimensions shows that the thickness is not a strong function of the DP, whereas the length appears to become a linear function of DP when DP≥65. The breadth of each L c distribution also decreases with DP, suggesting more uniform crystallites are present in high molecular weight polymers\",\"PeriodicalId\":16874,\"journal\":{\"name\":\"Journal of Polymer Science: Polymer Letters Edition\",\"volume\":\"27 1\",\"pages\":\"271-278\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1990-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Polymer Science: Polymer Letters Edition\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/POL.1990.140280901\",\"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 Polymer Science: Polymer Letters Edition","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/POL.1990.140280901","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of molecular weight on crystalline structure in thermotropic random copolymers
The characteristics of thermotropic liquid crystalline p-oxybenzoate/2,6-oxynaphtoate copolymers of similar composition with degrees of polymerization in the range of 25-150 were studied by TEM. Measurement of the crystallite dimensions shows that the thickness is not a strong function of the DP, whereas the length appears to become a linear function of DP when DP≥65. The breadth of each L c distribution also decreases with DP, suggesting more uniform crystallites are present in high molecular weight polymers
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