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A cross-linkable comonomer containing a diacetylene group,named dimethyl 4,4’-(buta-l,3-diyne-l,4-diyl)dibenzoate(DA) was synthesized and copolymerized with dimethyl succinate and 1,4-butanediol to prepare a series of slightly cross-linked PBS copolyesters(PBDASx).The chemical structure,crystallization and Theological behaviours of PBDASx were well investigated.Compared to neat PBS,PBDASx showed the greatly increased crystallization rate because of the promoting nucleation of the cross-linking domains,and the XRD results indicated that it had no influence on crystallization structure of PBS.The rheological behaviours indicate that PBDASx possessed higher viscosity than neat PBS even at high shear rate and temperature.PBDAS0.3 exhibited better comprehensive properties than neat PBS,which will widen applications of PBS.
A cross-linkable comonomer containing a diacetylene group, named dimethyl 4,4 ’- (buta-l, 3-diyne-l, 4- diyl) dibenzoate (DA) was synthesized and copolymerized with dimethyl succinate and 1,4-butanediol to prepare a series of slightly cross-linked PBS copolyesters (PBDASx). The chemical structure, crystallization and the biological behaviors of PBDASx were well investigated. Compared to neat PBS, PBDASx showed the greatly increased crystallization rate because of promoting nucleation of the cross-linking domains, and the XRD results indicated that it had no influence on the crystallization structure of PBS. The rheological behaviors that the PBDASx possessed higher viscosity than neat PBS even at high shear rate and temperature. PBDAS 0.3 vigor better neat PBS, which will widen applications of PBS.