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通过阴离子开环聚合制备了Si-H封端聚[1,3,5-三甲基-1,3,5(3,3,3-三氟丙基)硅氧烷](PMTFPS)大分子单体,进而与双烯丙基聚氧乙烯醚(PEO)进行硅氢加成反应合成了不同亲水/疏水嵌段比例的PMTFPS-b-PEO-b-PMTFPS三嵌段共聚物。分别利用GPC和1H-NMR等手段表征了嵌段共聚物的结构组成,测定了不同结构嵌段共聚物的平衡表面张力及临界胶束浓度(cmc)。研究表明,当疏水嵌段链长一定时,临界胶束浓度(cmc)值随聚醚嵌段的增长而下降;当聚醚嵌段长度一定时,cmc值不随疏水嵌段长度的变化而变化。
Si-H terminated poly [1,3,5-trimethyl-1,3,5 (3,3,3-trifluoropropyl) siloxane] (PMTFPS) macromolecules were prepared by anionic ring- PMTFPS-b-PEO-b-PMTFPS triblock copolymers with different hydrophilic / hydrophobic block ratios were synthesized by the hydrosilylation reaction with diallyl polyoxyethylene ether (PEO). The structure of the block copolymer was characterized by means of GPC and 1H-NMR, respectively. The equilibrium surface tension and the critical micelle concentration (cmc) of the block copolymers with different structures were measured. The results show that when the hydrophobic block chain length is constant, the critical micelle concentration (cmc) value decreases with the growth of polyether blocks. When the polyether block length is constant, the cmc value does not change with the length of the hydrophobic block .