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利用不同分子链长的聚乙二醇PEG300(分子质量300,下同)、PEG400、PEG600、PEG1000和PEG1500,合成了一系列新型的聚氨酯。探讨了聚乙二醇(PEG)亲水链段的分子链长,对聚氨酯薄膜表面接触角、透气性、吸水率和力学性能的影响。结果表明:随着PEG分子链的增长,合成的聚氨酯薄膜的表面接触角、吸水率、透气性和断裂伸长率增加,但是抗张强度却有所降低。
A series of novel polyurethanes were synthesized using polyethylene glycol PEG300 (molecular weight 300, the same applies), PEG400, PEG600, PEG1000 and PEG1500 with different molecular chain lengths. The molecular chain length of hydrophilic segment of polyethylene glycol (PEG) was investigated. The influence of molecular chain length on the contact angle, air permeability, water absorption and mechanical properties of polyurethane film was discussed. The results showed that with the increase of PEG molecular chain, the surface contact angle, water absorption, air permeability and elongation at break increased, but the tensile strength decreased.