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1、缩合型单组分RTV硅橡胶反应机理脱酮月亏型硫化机理ON-CMeEtON-CMeEt配制时:,N-CMeEtON-CMeEtON-CMeEtRi ON-CMeEt +H0(MezSiO )nH+RSji ON-CMeEtONCMeEtON-CMeEtON-CMeEti 0一( MeiSiOR+ 2MeEtC-NOHON-CMeEtON-CMeEtONCMeEt使用时:ONYMeEtON=CMeEt(MezSiO )n-R2H2OOHON-CMeEtOHR-Si -0( MezSiO )n-fi -R+2MeEtC-NOH2cMeEtONMeEtOHOHR-Si 0( MezSiO )n一;i -
2、RHOSis02cMeEtONCMeEtRSi0(MezSiO )n-Si-R+ MeEtC-NOH(倬柱体)式中 Me为甲基;Et为乙基;R为甲基或乙烯基。脱醇型脱醉型RTV-1为室温湿气冏化,吸收空气中的水分脱去醉型小分了发生同化交联,固化机理:OCHSOCHSH3cSiOCH3 + H2O H3c SiOH + CH30HOCH3OCH3OCH;CH;H3c SiOH + HO OCH3CH3A H3COch3 ch3dSiOSi CH5 : OCH3HO-S-HCH3yOCH, +H0SicArCH5ch3CH5OCH3 CH3A交联弹性体+2CH30H脱醋酸型制取中间体八甲基环四硅氧
3、烷:n (CH;) ,SiCl2 H()-m.i:一O + H + CH;裂化f J:一。+ 4CH,羟基封端的聚二甲基硅氧烷的催化反应如下式:产,m l(CH;)2SiOJ4 + (CH3)4NOHx: (CH;)4N()()+ yHCH,+ D,八甲基环四硅氧烷)交联反应机理为:OAC()AC/HQ/CH;Si-O/C 7T- CH SiOACOACOHHO (CH02SiO-J-mHH2() - ACOHzOHCHSiOACH()/ 1=CH;Si-OHH、()- NJ)HO (CHJiSKHeHO (CH-mHH) (CHJS/mH CHJ-O (CHhSOTnHO (CHJ2sqmH