Thermal Properties and Crystallization Behavior of Novel Biodegradable Poly(hexamethylene succinate-co-6 mol% butylene succinate) and Poly(hexamethylene succinate)
In this research, the thermal properties and crystallization behavior of novel poly(hexamethylene succinate-co-6 mol% butylene succinate) (PHBS) and its homopolymer poly(hexamethylene succinate) (PHS) were extensively studied. With respect to PHS, the introduction of a small content of butylene succinate (BS) unit slightly reduces the melting point and equilibrium melting point but hardly influences the glass transition temperature of PHBS. Despite crystallization temperature, PHS and PHBS crystallize through the same crystallization mechanism. At the same crystallization temperature, PHBS crystallizes more slowly than PHS; furthermore, lowering crystallization temperature enhances the crystallization rates of PHBS and PHS. The spherulites morphologies were observed for both of them, with the spherulites nucleation density of the copolymer being smaller than that of the homopolymer. PHBS and PHS share the same crystal structures, indicative of the location of BS unit in the amorphous region.
KeywordsThermal properties Crystallization kinetics Morphology Poly(hexamethylene succinate)
This study was funded by the National Natural Science Foundation, China (Grant Numbers 51373020, 51573016 and 51521062).
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Conflict of interest
The authors declare that they have no conflict of interest.
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