高等学校化学学报2011，Vol.32Issue(6)：1431-1435,5.
乙酸乙酯在D3F阴离子开环聚合中的促进作用
Promoting Effect of Ethyl Acetate on Anionic Ring-opening Polymerization of 1,3,5-Trimethyl-1,3,5-tris ( 3,3,3-trifluoropropyl) cyclotrisiloxane (D3 F)
摘要
Abstract
Poly [ methyl (trifluoropropyl) siloxane ] ( PMTFPS ) was prepared in the mixing chamber of a HAAKE torque rheometer using sodium silanolate as the initiator, and ethyl acetate (EA) as the promoter.The promoting effect of EA in the anionic bulk polymerization of D3 F was investigated. The results show that the maximum of number average molecular weight((-M)n =2.45 × 105) of PMTFPS was obtained with high yield (89. 2％ ) when the polymerization was carried out in the presence of 2.74％ initiator and 0.30 mol/L EA at 120 ℃ for 4.0 min. The backbiting reactions were almost suppressed and 0.74％ cyclic by-products were obtained by matrix-assisted laser desorption ionization time-of-flight mass spectrometry(MALDI-TOF-MS) for EA promoter system. Investigations of differential scanning calorimetry (DSC) and thermogravimetie analysis (TGA) show that PMTFPS can be used in a wide range of operational temperatures.关键词
氟硅聚合物/乙酸乙酯/阴离子开环聚合/转矩流变仪Key words
Poly [methyl ( trifluoropropyl ) siloxane ]/ Ethyl acetate/ Anionic ring-opening polymerization/Torque rheometer分类
化学化工引用本文复制引用
杨鹏,高亚娟,管涌,郑安呐..乙酸乙酯在D3F阴离子开环聚合中的促进作用[J].高等学校化学学报,2011,32(6):1431-1435,5.基金项目
国家自然科学基金(批准号:5093302)和上海市重点学科建设项目(批准号:B502)资助. （批准号:5093302）
