聚邻甲氧基苯酚抗氧剂对聚丙烯结晶动力学的影响  

Effect of polyguaiacol antioxidant on the crystallization kinetics of polypropylene

作　　者：张予东[1,2] 张磊 刘保英[1,2] 丁涛[1,2] 李庆华 Zhang Yudong;Zhang Lei;Liu Baoying;Ding Tao;Li Qinghua(College of Chemistry and Chemical Engineering,Henan University,Kaifeng Henan 475004,China;Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province,Kaifeng Henan 475004,China)

机构地区：[1]河南大学化学化工学院,河南开封475004 [2]阻燃与功能材料河南省工程实验室,河南开封475004

出　　处：《石油化工》2020年第3期238-245,共8页Petrochemical Technology

基　　金：国家自然科学基金资助项目(51703051)。

摘　　要：分别利用邻甲氧基苯酚和聚邻甲氧基苯酚为抗氧剂,制备了聚丙烯(PP)/聚邻甲氧基苯酚复合样条和PP/邻甲氧基苯酚复合样条。通过DSC和PLM等方法研究了抗氧剂对PP结晶行为的影响,并分析了相关结晶动力学参数的变化。实验结果表明,邻甲氧基苯酚和聚邻甲氧基苯酚抗氧剂对PP的结晶具有异相成核作用,可促进PP结晶,提高结晶速率,聚邻甲氧基苯酚抗氧剂的作用更明显。在等温和非等温结晶条件下,它们作为成核剂均使PP的结晶温度提高,半结晶时间缩短,结晶速率加快,但结晶机理未发生改变。用非等温结晶数据得到Hoffman-Lauritzen理论中参数Kg和U*的变化趋势与等温结晶数据得到的结果一致。Polypropylene(PP)/polyguaiacol composite spline and PP/guaiacol composite spline were prepared by using guaiacol and polyguaiacol as antioxidant respectively.The influence of antioxidant on the crystallization behavior of PP was studied by DSC and PLM,and the changes of related crystallization kinetic parameters were analyzed.The experimental results showed that guaiacol and polyguaiacol antioxidant had heterogeneous nucleation effect on the crystallization of PP,which could promote the crystallization of PP and improve the crystallization rate,and the effect of polyguaiacol antioxidants was more obvious.Under isothermal and non-isothermal crystallization,as nucleating agents,both of them increased the crystallization temperature,shortened the halfcrystallization time and accelerated the crystallization rate of PP,but the crystallization mechanism remained unchanged.Kg and U*in Hoffmann-Lauritzen theory were obtained by non-isothermal crystallization data,and their variation trends were consistent with the results obtained by isothermal crystallization data.

关 键 词：聚邻甲氧基苯酚抗氧剂 聚丙烯 Hoffman-Lauritizen理论 结晶动力学 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]