亲水改性的PBS-co-Glu共聚酯与磷酸酯淀粉复合材料的性能研究

Study on properties of hydrophobically modifying copolyester PBS-co-Glu/Phosphate starch composites

摘要:

以不同含量L-谷氨酸(Glu)对聚丁二酸丁二醇酯(PBS)进行了亲水改性，并运用乳液-流延法与磷酸酯淀粉(PPS)共混，制备了PBS-co-Glu/PPS复合材料。采用FTIR、1H-NMR表征PBS-co-Glu共聚酯的化学结构；GPC、XRD、POM、SEM和拉伸实验，对其亲水性、结晶性能及力学性能进行了测试和分析，脂肪酶降解实验测试复合材料的降解性能。研究结果表明：随Glu含量的增加，PBS-co-Glu/PPS 复合材料的断裂伸长率有所增加，当Glu为4%时，PBS-co-Glu/PPS复合材料断裂伸长率达到最大；复合材料的光透过率及降解性均有显著的增加。

Abstract:

The polybutylene succinate (PBS) was hydrophobically modified by various content of L-glutamic acid (Glu) and blended with phosphate starch (PPS) by emulsion-casting method to prepare PBS -co-Glu/PPS composite. The chemical structure of PBS-co-Glu copolyester was characterized by FTIR and 1H-NMR. The hydrophilicity, crystallinity and mechanical properties of PBS-co-Glu copolyester were analyzed by GPC, XRD, POM, SEM and tensile test, Lipase degradation experiment was performed to evaluate the degradability of composite materials. The results showed that the elongation at break of PBS-co-Glu/PPS composite increased with the increase of Glu content, and the value elongation at break reached the maximum when the Glu content was 4%, at the same time, transmittance and degradability were significantly increased.