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- W2369922969 abstract "Syndiotactic 1,2-polybutadiene(s-PB) was prepared taking Fe(2-EHA)3/Al(i-Bu)3/DEP as catalyst in hexane at 50 ℃.Characterized by 13 C NMR measurement,the contents of 1,2-structure and syndiotacticity of production are 89.3% and 86.5%,respectively,and the crystallinity is about 68%.Differential scanning calorimetry(DSC) was introduced on relevant non-isothermal crystallization kinetics,and the modified Avrami analysis showed that the Avrami exponent varies from 2.73～3.22 in primary stage,thus indicating that the crystallization behavior of s-PB is a thermal or athermal self-nucleation growing in three-dimensional spherulization.The Ozawa equation was proved that it fails to describe the non-isothermal crystallization process.However,combining the Avrami and Ozawa equations together can describe the non-isothermal crystallization process well,which shows that the exponent a is 1.138,and F(θ) increases with crystallinity.The effective energy barrier was also calculated." @default.
- W2369922969 created "2016-06-24" @default.
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- W2369922969 date "2007-01-01" @default.
- W2369922969 modified "2023-09-26" @default.
- W2369922969 title "Structure and Non-isothermal Crystallization Kinetics of Syndiotactic 1,2-Polybutadiene" @default.
- W2369922969 hasPublicationYear "2007" @default.
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