Properties of Poly(Butylene Succinate)(PBS) with Various Chemical Structures

Polyesters with different chemical structures,such as poly(butylene succinate)(PBS),poly(butylene succinate)-co-(ethylene succinate) (PBS-co-ES),poly(butylene succinate)-co-(hexane succinate)(PBS-co-HS),poly(butylene succinate)-co-(butylene adipate)(PBS-co-BA),were synthesized via direct polycondensation.Their chemical structures were identified by FT-IR and 1H-NMR,the relationships between chemical structures and physical properties,biodegradabilities were compared.The results indicated that the compared with pure poly(butylene succinate),the copolymers had lower melting points and lower degrees of crystallinity and increased elongations at break.The results of TG indicated that the thermal stability of PBS-co-HS were improved compared with PBS,while PBS-co-BA,PBS-co-ES declined.Composting degradation experiments showed that the degradation rates of copolymers remarkably increased compared with homopolymer.The order of their degradabilities was:PBS-co-BAPBS-co-HSPBS-co-ESPBS.PBS-co-HS was a comparatively good candidate.