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以1,4-丁二醇(B),丙三醇(G)和癸二酸(S)通过熔融缩聚合成新型聚酯改性剂聚癸二酸丙三醇丁二醇酯(PGBS),并制备了PGBS/PLA共混物。用FTIR、1H-NMR、DSC、SEM分别表征了PGBS的分子结构及共混物的热性能、相形貌,同时对其力学性能和亲水性进行研究。结果表明:PGBS和PLA是部分相容的;G含量为0时,PGBS对PLA的结晶促进作用明显。随G含量增加,PGBS能很好地提高PLA的断裂伸长率和冲击强度;共混物的亲水性亦随G含量增加有明显提高。
A new polyester modifier polybutylene sebacate (PGBS) was synthesized by melt polycondensation with 1,4-butanediol (B), glycerol (G) and sebacic acid (S) And PGBS / PLA blends were prepared. The molecular structure of PGBS and the thermal properties and morphology of PGBS were characterized by FTIR, 1H-NMR, DSC and SEM, respectively. The mechanical properties and hydrophilicity of PGBS were also studied. The results showed that PGBS was partially compatible with PLA. When the content of G was 0, the effect of PGBS on the crystallization of PLA was obvious. With the increase of G content, PGBS can improve the elongation at break and the impact strength of PLA. The hydrophilicity of blends also increases obviously with the increase of G content.