新型聚氨酯表面改性大分子的合成及其与聚醚聚氨酯的共混体系的研究

Synthesis of the novel polyurethane surface modifying macromolecules and the study of its blends with polyether urethane (PEU)

合成了表面改性大分子(C16PEG-PU),该分子中间为氨基甲酸酯基团,氨基甲酸酯基团的外侧是柔性的且具有抗粘附的聚乙二醇(PEG)链,分子的两端是具有杀菌功能的季铵盐基团.将C16PEG-PU与普通聚醚聚氨酯(PEU)共混,用FTIR研究了C16PEG-PU与PEU的氢键结合情况,发现表面改性大分子中间为氨基甲酸酯基团可以与普通聚醚聚氨酯(PEU)中的硬段氢键结合而固定在基体材料上;力学性能测试发现少量表面改性大分子对PEU的力学性能影响不大;水解触角研究发现,少量的表面改性大分子就可以对PEU进行表面改性.

A novel Polyurethane Surface Modifying Macromolecules （SMMs）, which is denoted as CI6PEG-PU, is synthesized. It is urethane groups in the middle part of the SMMs, which act as ＂anchor＂ on the hard segments of ordinary polyurethane （PEU） by H-bonded with the hard segments when blended with PEU as is verified by FTIR. The flexible PEG chain and the quaternary ammonium salts （QAS） with a long alkyl chain are located on the outer part of the SMMs, which are enriched on the surfaces of the blends. Furthermore the hydrophobic alkyl chain which located on the outmost layer in the air environment blended down in the aqueous environment as is proven by water contact angle experiment.