| 摘要 |
The polyester block copolymer is prepd. by addition and copolymerization of the soft segment component comprising the aliphatic polyester diol of formula (I) and aromatic dicarboxylic acid, and the hard segment component comprising the lower molecular weight diol and aromatic dicarboxylic acid. In the formula, R1 is methyl or ethyl; R2 is H, methyl or ethyl; X is integer of 1-10; n is integer of 1-30. The obtd. copolymer has a good heat resistance and elasticity by using the aliphatic polyester diol in place of polyeter in soft segment part.
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