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中文摘要：
用熔融缩聚法合成了一系列的聚丁二酸丁二醇酯（PBS）和聚丁二酸丁二醇酯/对苯二甲酸丁二醇酯（PBST）。GPC检测显示聚合物分子量为8×10^4,通过1HNMR图谱分析了聚合物的序列分布,发现PBT比例（XPBT）为33mol%时聚合物嵌段性最强。DSC/TG曲线上可以观察到随着XPBT增加玻璃化温度（Tg）升高、熔点（Tm）先降低后上升,热分解温度由367.74℃上升到372.95℃。力学性能检测显示硬段的加入改善了PBS的耐热性和力学性能。
英文摘要：
A series of polyesters, poly （ butylene succinate） （PBS） and poly （ butylene succinate-co-terephthalate） s （PBST） were obtained by melt poly condensation technique. The GPC results revealed that the molecular weight of polymers were 8 ×10^4. The analysises on the sequence showed that when XPBT was 33mo1% ,the degree of randomness was lowes. DSC/ TG curve showed that Tg became high and Tm became low then high,while thermolysis temperature increased from 367.74℃to 372. 95℃ with XPBT increasing. The mechanical properties testing showed that hard segment could improve the heat stability and mechanical property of PBS.
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