The T g of polyester soft segment is higher than of polyether soft segment,and the elastic modulus increases in the order of PPG PEG PTMG in the PU elastomer.

• 在PU弹性体中 ,聚酯软段比聚醚软段的Tg 高 ,弹性模量依PPG、PEG、PTMG软段顺序增加