摘要
以聚甲基丙酮肟基硅氧烷(PMKS)作为交联剂,将端羟基聚二甲基硅氧烷(PDMS)在室温下交联固化生成硅橡胶,并研究了PMKS对硅橡胶固化性能与力学性能的影响。计算表明,交联反应的表观活化能为104kJ/mol,IR测试表征了体系固化前后官能团的变化。硅橡胶的交联密度随PMKS含量的提高而增大。与传统交联剂相比,PMKS可以原位形成一种高交联密度的PMKS相,这种PMKS相对硅橡胶有显著地增强作用。PMKS可作为硅橡胶的新型室温增强交联剂。
Polymethyl（dimethylketoxime）siloxane（PMKS） with dense pendant silicone-ketoxime groups was used as linking reagent for room temperature vulcanized polydimethylsiloxane（PDMS）.The apparent activation energy for crosslink reaction was 104kJ/mol and changes of functional group from uncure to cure was characterized by the IR.The crosslink density was increased as the increase of PMKS content.It was detected that PMKS can form in situ a high crosslink density PMKS phase and these PMKS phases improved the mechanical properties of silicone elastomer significantly.PMKS could be used as room temperature enhancing crosslinker for silicone elastomer.
出处
《化工新型材料》
CAS
CSCD
北大核心
2011年第4期77-79,共3页
New Chemical Materials
关键词
聚甲基丙酮肟基硅氧烷
硅橡胶
交联剂
原位增强
Polymethyl（dimethylketoxime）siloxane
silicone elastomer
crosslinking reagent
in-situ reinforcemen
