摘要
以八甲基环四硅氧烷、四甲基四乙烯基环四硅氧烷为单体,六甲基二硅氧烷为封端剂,碱胶为催化剂,合成了含乙烯基有机硅树脂;并研究了电子束辐射剂量对其固化行为的影响和固化涂层的热性能。红外谱图及凝胶率测试结果表明,有机硅树脂中的碳碳双键吸收峰强度随辐射剂量的增加而减弱,辐射诱导交联网络结构的形成导致固化涂层的凝胶率随剂量的增加而显著增加;辐射剂量为30 kGy时,凝胶率为46.2%;辐射剂量增加至60 kGy时为70.1%和100 kGy时为85.9%。差示扫描量热分析和热质分析结果表明,固化涂层具有优良的耐低温性和热稳定性。
In this paper, silicone resin containing vinyl group was synthesized using octamethylcyclo- tetrasiloxane and 4 - methyl - 4 - vinyl cyclotetrasiloxane as monomers, hexamethyldisiloxane as blocking agent, alkali gum as catalyst. The curing behaviors of silicone resin as a function of irradiation dose by electron beam and the thermal properties of cured film were investigated. The results from FT - IR and gel fraction have shown that the absorption peak intensity of carbon - carbon double bonds decreased with the increase of EB dose. Gel fraction of silicone resin increased significantly with the increase of dose due to the formation of radiation - induced crosslinking networks, 46.2% at 30 kGy, then increased to 70. 1% and 85.9% at dose of 60 kGy and 100 kGy respectively. The results of DSC and TG analyses indicated that the cured coatings film had good low temperature resistance and thermal stability.
出处
《涂料工业》
CAS
CSCD
北大核心
2011年第3期7-9,13,共4页
Paint & Coatings Industry
基金
日本NHV Corporation资助项目(08H0783)
关键词
有机硅树脂
乙烯基
电子束
固化
热性能
silicone resin
vinyl group
electron beam
curing
thermal properties
