关键词: 三硅氧烷表面活性剂, 聚醚, 水解稳定性

Abstract:

Methoxy-terminated polyether polyols were used to modify 1,1,1,3,5,5,5-heptamethyltrisiloxane[BFQ] (MDHM) to prepare trisiloxane surfactant by using Pt complex catalyst under no solvent condition and the protection of nitrogen.The products were characterized with IR, and their hydrolytic stability properties were compared with similar siloxanes.The reaction conditions were investigated, and the optimized conditions were as follows: n_AEM∶n_MDHM=0.9∶1，temperature and time 100℃ and 9 h respectively, catalyst dosage (in terms of Pt) 12×10-4% of the total mass of the reactants.The result showed that CMC was 0.021 g·L^-1, and ^γ_CMC was 17.61 mN·m^-1.The change in surface tension of the products with time under alkaline and acidic condition was the lowest, and the hydrolytic stability was better than similar siloxanes.

Key words: 三硅氧烷表面活性剂, 聚醚, 水解稳定性