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论文类型：期刊论文

发表时间：2006-12-01

发表刊物：POLYMER DEGRADATION AND STABILITY

收录刊物：SCIE、EI、Scopus

卷号：91

期号：12

页面范围：3281-3288

ISSN号：0141-3910

关键字：liquid crystalline; PBS; random copolyesters; hydrolytic degradation

摘要：To increase the thermal and mechanical properties of the aliphatic polyester poly(butylene succinate) (PBS), a series of potentially biodegradable liquid crystalline aromatic/aliphatic random copolyesters were prepared by melt polycondensation of new mesogenic monomers dimethyl 4,4'-(terephthaloyidioxy) dibenzoate (MTB), dimethyl succinate, and 1,4-butanediol. The synthesized copolyesters were characterized by means of proton nuclear magnetic resonance spectroscopy (H-1 NMR), gel permeation chromatography (GPC), viscosity measurements, differential scanning calorimetry (DSC), thermogravimetry (TG), X-ray diffraction (XRD), polarizing light microscopy (PLM) and mechanical property measurements. The MTB content was varied so that the effects of the mesogen content on the thermal and mechanical properties, degradable behaviours and mesophase were examined. It was found that introducing the rigid rod mesogens could increase the thermal stability and the mechanical properties, while it reduced the melting temperature (T-m), the crystallization temperature (T-c), the degree of relative crystallinity (X-c) and the hydrolytic degradation rate. Only the homopolyester poly(butylenes terephthaloyldioxy dibenzoates) was able to show the schlieren texture characteristic of nematics. (c) 2006 Elsevier Ltd. All rights reserved.