硅烷接枝温水交联天然橡胶的研究  

Study on Natural Rubber Grafted by Silane and Crosslinking in Hot Water

作　　者：段景宽[1,2] 蒋岚[1] 范常秀[1] 陈宗宗[1] 王林峰[1] 邵双喜[1] 刘柏平[2] 

机构地区：[1]宁波工程学院材料工程研究所,浙江宁波315016 [2]华东理工大学化工学院化学工程联合国家重点实验室,上海200240

出　　处：《中国塑料》2012年第3期39-46,共8页China Plastics

基　　金：浙江省宁波市自然基金(2009A610045);中国博士后基金(20100470754)

摘　　要：以多功能乙烯基硅烷为接枝单体,过氧化苯甲酰为引发剂,通过熔融混炼接枝和温水交联分别制备了硅烷接枝天然橡胶和交联硅烷接枝天然橡胶,采用傅里叶红外光谱仪和扫描电子显微镜对其进行了表征,并研究了接枝单体及引发剂用量、接枝和交联工艺(温度和时间)等对其凝胶含量的影响,同时研究了不同凝胶含量对其力学性能的影响。结果表明,天然橡胶发生了硅烷接枝和交联反应;随着接枝单体及引发剂用量、混炼时间和温度以及交联温度和时间的增加,交联硅烷接枝天然橡胶的凝胶含量单调增加,其力学性能随着凝胶含量的增加而明显得到改善,凝胶含量为80%时,其拉伸强度比纯天然橡胶提高了30%,断裂伸长率提高了8.5倍。Using benzoyl peroxide （BPO） as an initiator, vinyl silane was grafted onto nature rubber via melt-blending forming NR-g-silane, which could be further treated via hot water crosslinking. The grafted rubbers were characterized using FTIR and SEM. Effects of contents of silane and BPO, grafting and crosslinking conditions （time and temperature） on gel content of crosslinked NR-g-silane were studied in this article. Relationship between gel content and mechanical property of the samples was also explored. With increasing contents of silane and BPO, blending time and temperature, crosslinking time and temperature, and gel content of crosslinked NR-g-silane increased monotonously. With increasing gel content, an obvious improvement in mechanical property was observed. Compared with nature rubber, tensile strength and elongation at break of crosslinked NR-g-silane （80 wt % gel） were improved by 30 % and 8. 5 times, respectively.

关 键 词：天然橡胶 硅烷 接枝 温水交联反应 

分 类 号：TQ332[化学工程—橡胶工业]