Kasi fundo ya high- temperature vulcanization ya peroxides?

Aug 26, 2025 Lekani uthenga

Kuchita kwa vulcanization high high - tempolized silicone rabar yikusangika mwakuyana na nthowa yaulere yakuchitira vinthu. Pa nyengo yakutenthemeska, peropodides zakupangika na vyakumera zikuvunda kuti zipangire vinthu vyambura kulipiliska, ivyo pamanyuma vikuchita na magulu gha vinyama mu mamolekyulu gha polysiloxane nga ni magulu gha methyl na ethyl kuti vipangiske kuti viŵe vyapachanya - molecular radicals. Para vinthu ivi vyapachanya - molecular radicals vikukolerana, 19 - linking yikuchitika.

 

Pali mitundu 6 iyo ŵanthu ŵanandi ŵakugwiliskira ntchito mu high high top upcalcanized silicone rabar. Vinthu ivyo vikupangiska kuti munthu waŵe na suzgo la vulcanization na vigaŵa vyakupambanapambana vya peroxides zakupambanapambana vikuyana yayi.

 

Ŵanthu awo ŵakugwiliskira ntchito ŵangasankha vinthu vyakwenelera mwakuyana na ivyo ŵakukhumba. Mwachiyelezgero, kuchepa kwa nyengo (1}} nyengo yakuzizima kwa peroxides nga ni di peroxide (2, 4-dichlolobenzene) kungapereka chiŵelengero cha vulcanization mwaluŵiro chomene, ndipo nthunzi ya nkhongono zake zakuvunda njakuchepa chomene, ntheura palije kupanikizgika kwakusazgikira uko kukukhumbikwa kuti kuleke kupangika kwa mabowo. Ntheura, kanandi ŵakugwiliskira nchito chinthu ichi kuti ŵafumyemo mphepo yakutentha na kupanga vinthu. Kweni, chifukwa cha liwiro ilo likuchitika mwaluŵiro, charring chikuchitika para munthu wakuponya vinthu vyakuwonda panji kusamuska nkhungu. Mu nyengo zanthena, peroxides na liwiro lakuchedwa la vulcanization, nga ni benzoyl peroxide, ni vyakwenelera.

 

Ndipouli, chinthu ichi chizamupangiska kuti paŵe gasi pa nyengo iyo ŵakupangira vulcanization, ntheura chingapangika yayi na mphepo yakutentha. M’malo mwake, mphamvu yakulutilira na nthunzi yikugwiriskirika nchito comene. Chinthu chinyake icho chikupangiska kuti vinthu ivi viŵe vyambura kwenelera-} vikasintha chomene - temperatizing agent ni vyakuti para ŵakuponya vinthu vyakuwonda, vinthu vyawo vyakuvunda vya asidi vizamuŵa na vyakuchitika viheni pa kukhazikika kwa kutentha kwa vinthu.

 

Nangauli vikugwira ntchito makora chomene vya vulcanization vulcaniting nga ni diisopypybenzene peroxide na diizal peroxide na diil -ttert -butyl peroxide vyakwenelera waka pa raba ya methyl ya methyl, iwo ndiwo ŵali na vinthu viwemi chomene vyakupangiska kuti vinthu viŵe vyakukhora ndiposo vingagwiliskirikaso ntchito mu carbon black - containting raba ya compound