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1.It noteworthy that the copolymers are unbreakable during the impact experiment and possess good impact resistance.
2.Though all the copolymers show two separate melting peaks during the heating scans, only polymer1 and   polymer2 display two well-defined crystallization peaks during the cooling scans, corresponding to the crystallization of the two crystalline segments. In contrast with the crystallization peak of PCL segment in PES-PCL70-30, the crystallization peak of PES segment in PES-PCL30-70 is so flat that cannot be determined accurately.
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