一种可聚合聚氨酯高分子表面活性剂的合成

以甲苯二异氰酸酯和聚醚为主要原料,合成了一类带有双键的可聚合非离子型聚氨酯高分子表面活性剂。使用FTIR、1HNMR对合成产物的结构进行了表征,采用表面张力仪对其表面活性进行了测定。实验结果表明,由烯丙基聚氧乙烯醚(Mn=1000)和聚氧丙烯醚(Mn=2000)与甲苯二异氰酸酯反应所得产物(Ⅲ),在浓度为0 06mol/L时可使溶液表面张力降至37 6mN/m(25℃),同时所合成的3种不同相对分子质量的产物均具有较低的临界胶束浓度(10-4～10-5mol/L),且在浓度很低时仍然具备较好的降低表面张力的能力(产物Ⅲ浓度为10-6mol/L时,表面张力为51 7mN/m)。

Synthesis of A Kind of Polymerizable Macromolecular Surfactant

A series of polymerizable macromolecular surfactants were synthesized by reaction of tolylene diisocyanate with vinyl-terminated polyethylene glycol and polypropylene oxide and characterized by FTIR and~1HNMR to confirm the expected chemical structure.The surface tension was measured by surface tensiometer.The sample Ⅲ synthesized by vinyl-terminated polyethylene(M_n=1000),polypropylene(M_n=2000) and tolylene diisocyanate was found to exhibit excellent surface activity.The surface tension of the solution of sample Ⅲ can be reduced to 37.6 mN/m at concentration of 0.06 mol/L and 25 ℃.All the three products obtained have low critical micelle concentration(approximately 10~(-4)～10~(-5) mol/L) and can reduce surface tension even at very low concentration level.