【摘要】 采用本体聚合方法合成了丙烯/1-丁烯无规共聚树脂,用DSC研究了丙烯/1-丁烯无规共聚物的等温结晶动力学。根据Avrami方程求出了各个结晶温度下的结晶动力学参数K(T)、n、t1/2以及样品的结晶活化能。结果表明,随着结晶温度的升高,同一样品的结晶速率逐渐下降,说明样品的结晶是依热成核控制为主,Avrami指数n在3～4之间,表明共聚物晶体的生长方式为三维球状生长。在同一结晶温度条件下,随着共聚物中1-丁烯单元含量的增加,晶体的成核和结晶速率均下降,结晶活化能增加,共聚物中1-丁烯单元含量对结晶速率的影响很大。更多还原

【Abstract】 In this paper,propylene/1-butene random copolymer was prepared via bulk polymerization.The isothermal crystallization kinetics of the copolymers was studied using DSC.According to Avrami equation,crystallization kinetic parameters K(T),n,t1/2,and crystallization activation energy of the samples under various crystallization temperature were obtained.The crystallization rate decreased with increasing crystallization temperature.Avrami index was between 3 and 4,indicating that the crystal growth was three-dimensional spherical growth.At the same crystallization temperature,the crystal nucleation and crystallization rate decreased and the crystallization activation energy increased with increasing 1-butene unit content.更多还原