聚醚与甲基丙烯酸十二烷基酯共改性硅油的制备与表征

Preparation and Characterization of PolyetherModified Silicone fluid with Dodecyl Methacrylate

以氯铂酸为催化剂,烯丙醇聚氧乙烯聚氧丙烯醚(F-6)、甲基丙烯酸十二烷基酯(LMA)和含氢硅油(PHMS)为原料,通过硅氢加成制备了聚醚与甲基丙烯酸十二烷基酯共改性硅油(PMS),并用红外光谱和核磁共振氢谱对其结构进行了表征。考察了硅氢键与碳碳双键的量之比、反应温度、反应时间、催化剂用量对Si—H转化率的影响,确定了最佳工艺为:甲苯的质量分数30%～40%,Si—H与CC的量之比1.00∶1.20,催化剂用量为30×10-6,反应温度为90℃,反应时间为6 h,Si—H转化率达到92.35%。产物水溶液的临界胶束浓度为0.6 g/L,PMS的临界表面张力为22.236 mN/m,表现出低表面能的特点。

A modified silicone fluid （PMS） were synthesized by hydrosilylation with allyl terminated polyoxyethylene polypropylene ether （F-6）, lauryl-methacrylate （LMA） and hydrogen siloxane fluid as mate-rial, with chloroplatinic acid as the catalyst .The chemical structure of the synthesized product was character-ized by infrared （FT-IR） spectrum and nuclear magnetic resonance （1H NMR） spectrum.The effects of the molar ratio of Si-H and C=C olefinic bond, reaction temperature , time, and the amount of catalyst on the reaction conversion of Si-H were discussed .The production was that with the molar ratio of Si-H and C=C of 1∶1.2, the amount of catalyst of 30×10-6 , the reaction temperature at 90℃, and the reaction time of 6h, the yield achieved 92.35%.The critical micelle concentration of product water solution PMS is 0.6 g/L, the critical surface tension of PMS was 22.236 mN/m, which showed the characteristics of low surface energy.