摘要
利用差示扫描量热仪(DSC)研究了热还原氧化石墨烯(TRG)对聚丙烯/乙烯-辛烯无规共聚物(PP/POE)等温结晶的影响,并用Avrami方程分析了PP/POE和加入石墨烯的PP/POE/TRG两个体系的结晶动力学。结果表明,Avrami指数n在这两个体系中的数值接近,在结晶温度升高时两个体系的半结晶时间会相应增大,其中PP/POE/TRG复合体系的半结晶时间比PP/POE明显减小,结晶速率更大,表明加入的石墨烯具有较好的异相成核作用。此外,PP/POE/TRG复合体系中PP的相对结晶度比在PP/POE中增大,结晶温度对PP/POE/TRG复合体系熔融温度的影响较小。
In this paper, the isothermal crystallization behavior of polypropylene （PP） /ethylene- propylene copolymer blend （POE） and PP/POE/graphene composites was investigated by differential scanning calorimetry （DSC）. The isothermal crystallization kinetics can be explained by Avrami equation with similar exponent n for PP/POE blend and PP/POE/graphene composites, indicating no change in nulcleation mechanism after the addition of graphene. The half crystallization time （t1/2 ） of PP/POE/ grapheme composites was observed to be much shorter than that of PP/POE blend as graphene can effectively promote the nucleation of PP during its crystallization process. Besides, the relative crystallization degree of PP/POE can be increased after the introduction of graphene.
出处
《塑料工业》
CSCD
北大核心
2017年第9期110-113,共4页
China Plastics Industry
基金
海南省自然科学基金(20165194)
海南省高等学校科学研究项目(Hnky2015-2)
2016年海南省自然科学基金(20165183)
关键词
石墨烯
聚丙烯
热塑性弹性体
等温结晶
复合材料
Graphene
Polypropylene
Thermoplastic Elastomer
Isothermal Crystallization
Composites
