生物降解聚丁二酸丁二醇/1,3-丙二醇酯的合成与表征

以丁二酸、丁二醇和1,3- 丙二醇（1,3-PDO）为原料,采用熔融缩聚法,合成了-系列新型可降解的聚丁二酸丁二醇酯/丁二酸1,3- 丙二醇酯共聚物 P（BS-co-PDO）.选用红外光谱仪和核磁共振仪对共聚物的化学结构进行了表征.研究了1,3-PDO的添加量对共聚物的相对分子质量、热性能、结晶性能、力学性能、透光率以及降解性能的影响.结果表明：随着1,3-PDO添加量的增加,共聚物的分子量、熔点和结晶度呈降低趋势;相对于聚丁二酸丁二醇酯而言,引入1,3-PDO组分的共聚物的热性能提高,柔韧性增强,断裂伸长率增大,透光率提高;降解测试结果表明,1,3-PDO组分含量越多,共聚物的降解性能越好.

Synthesis and Characterization of Biodegradable Copolyester ( Succinic Acid-1,4-Butanediol-1,3-Propanediol )

A series of novel biodegradable poly(butylene succinate-co-1,3-propanediol succinate) P(BS-co-DO)] were synthesized by melt polycondensation from succinic acid with 1,4-butanediol and 1,3-propanediol. Their chemical structures were identified by FT-IR and 1H-NMR. The effect of 1,3-propanediol amount on the relative molecular weight, thermal properties, crystallinity, mechanical properties, light transmittance and biodegradation of the copolyester were studied. The results showed that the relative molecular weight, Tm and crystallinity decreased with the increase of 1,3-propanediol content. Compared with PBS, the thermal properties, flexibility, elongation at break and light transmittance of the copolyester containing 1,3-propanediol were improved. Degradation experiments showed that the degradation rates of copolymers increased with the increase of 1,3-propanediol content.