Effect of molecular weight on the properties of poly(butylene succinate)
Effect of molecular weight on the properties of poly(butylene succinate)
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DOI：
10.1007/s10118-014-1463-4
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发表时间：
2014-05
影响因子：
4.3
通讯作者：
T. Jin;Mi Zhou;Shao-dong Hu;Feng Chen;Q. Fu;Yi Fu
中科院分区：
文献类型：
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作者：
T. Jin;Mi Zhou;Shao-dong Hu;Feng Chen;Q. Fu;Yi Fu
以丁二醇和丁二酸为原料，采用直接熔融缩聚法合成了不同相对分子质量的聚丁二酸丁二醇酯(PBS)。用核磁共振氢谱和傅里叶变换红外光谱对合成的PbS进行了表征。根据特性粘数计算出其相对分子质量，其取值在20000~70000之间。用差示扫描量热仪(DSC)和偏光显微镜(PLM)分别研究了聚合物的结晶行为和结晶形态与相对分子质量的关系。本文还研究了聚合物的力学性能和随相对分子质量变化的降解行为。结果表明，PbS的性质由分子质量和结晶性能(结晶度和晶体形态)共同决定。我们的工作对于设计和制备具有合适相对分子质量的PBS具有重要的实际应用价值。
Poly(butylene succinate) (PBS) with different molecular weight was synthesized from 1, 4-butanediol and succinic acid by direct melt condensation. The synthesized PBS was identified by1H-NMR and FTIR spectrometry. The molecular weight was calculated from the intrinsic viscosity, and its value was between 20000 and 70000. The crystallization behavior and crystal morphology as function of molecular weight were investigated by DSC and PLM, respectively. The mechanical properties and hydrolytic degradation behaviors related with change of molecular weight were also studied in this work. The results demonstrated that the properties of PBS were determined by both molecular weight and crystallization properties (crystallinity as well as crystal morphology). Our work is important for the design and preparation of PBS with proper molecular weight for its practical application.