摘要
采用DSC方法研究了纳米二氧化硅 (SiO2 )填充线性低密度聚乙烯 (LLDPE)的熔融特性。结果表明 :填充LLDPE的高温熔融峰峰值温度Tm2 变化不大 ,低温熔融峰温Tm1则随着纳米SiO2 用量的增加明显向低温偏移 ,显示出纳米粒子的异相成核作用 ;在纳米SiO2 用量相同的情况下 ,与表面未处理SiO2 及经表面偶联剂处理纳米SiO2 填充体系相比较 ,加有大分子相容剂的体系的Tm1和Tm2 均有所下降 ,同时熔融峰宽化 ;填充LLDPE的热变形温度HDT和软化温度Ts 均随纳米SiO2 用量的增加而提高 ;与表面未处理填充体系相比 ,硅烷偶联剂处理纳米SiO2 填充体系的HDT有所上升 。
The melt property of LLDPE filled with nano-scale SiO 2 was studied.The results indicated that T m2 changed little and T m1 decreased with the increase of the content of nano-scale SiO 2.The T m2 and T m1 of the system added with macromolecular compatibilizer decreased and the melting peak widened compared with those of the system without compatibilizer.Compared to the system filled with nano-scale SiO 2 treated with a silane coupling agent,the HDT and T s of the filled system increased with the increase of the content of nano-scale SiO 2.The study of thermal deformation demonstrated that both HDT and T s increased with increasing of SiO 2 content.Compared with the LLDPE filled with non-surface treated nano-scale SiO 2,the HDT of the system filled with silane coupling agents treated nano-scale SiO 2 increased and the HDT of the system filled with macromolecular compatibilizer was more higher.
出处
《塑料工业》
CAS
CSCD
北大核心
2004年第8期48-51,共4页
China Plastics Industry
