摘要
选用线性低密度聚乙烯(LLDPE),接枝单体乙烯基三甲氧基硅烷(VTMOS),以过氧化二异丙苯(DCP)为引发剂,采用熔融挤出法对LLDPE进行硅烷接枝,然后在催化剂二月桂酸二丁基锡(DBTDL)存在下进行水解交联反应。研究了凝胶含量随水解时间的变化关系。通过改变VTMOS、DCP用量,系统地考察了对交联LLDPE的凝胶含量、力学性能以及结晶性能的影响。结果表明:凝胶含量在水解初期随时间的增长而快速增加,10h后凝胶含量趋于平缓。硅烷接枝交联LLDPE,由于其三维网络结构的存在,使得力学性能显著提高,其熔点和结晶度则都有不同程度的降低。
The silane graft crosslinking reaction of LLDPE was researched, the result indicated that the gelation increased with the increase of the hydrolysis time at first, and did not increase obviously with the increase of the time 10 hours after the beginning, tridimensional structure was shaped by crosslinking of LLDPE , The mechanical properties enhanced evidently, meanwhile , the Tm , △Hm and crystallization degree decreased various , according to the degree of crosslinking.
出处
《化工新型材料》
CAS
CSCD
北大核心
2009年第10期96-98,121,共4页
New Chemical Materials
基金
吉林省科技厅资助项目(项目号20076024)
