聚丁二酸-己二酸丁二醇酯的合成与表征

Synthesis and characterizations of poly(butylene succinate-co-butylene adipate)

以1,4-丁二醇及不同比例的己二酸、丁二酸为原料,制备一系列聚丁二酸-己二酸丁二醇酯[P(BS-co-BA)]共聚酯,借助衰减全反射傅里叶变换红外光谱仪(ATR-FTIR)、核磁共振仪(1H-NMR)、差示扫描量热仪(DSC)、X射线衍射仪(XRD)以及热重分析仪(TG)等对共聚酯的结构性能进行表征分析。角质酶降解结果表明,在经过16 h后,4种共聚酯降解率均达到80%以上,2种均聚酯均仅为40%左右。其中聚酯酶降解速率为P(BS-co-40%BA)>P(BS-co-60%BA)>P(BS-co-80%BA)>P(BS-co-20%BA)>聚己二酸丁二醇酯(PBA)>聚丁二酸丁二醇酯(PBS)。综合可知P(BS-co-40%BA)热稳定性相比于PBA更好,降解性能较PBS更好,为最佳共聚酯。

In this work,a series of poly(butanediol adipic ester)[P(BS‑co‑BA)]copolyesters were synthesized by using 1,4‑butanediol,adipic acid,and succinic acid as raw materials,and their structures and properties were characterized and analyzed by using attenuated total reflection Fourier‑transform infrared spectrometer,nuclear magnetic resonance instrument,differential scanning calorimeter,X‑ray diffractometer,and thermogravimetric analyzer.The keratin enzyme degradation results indicated that the four copolyesters reached more than 80 wt%after reacting16 h,but the two homopolyesters only reached about 40 wt%.The degradation rate of polyester enzyme increased by a order of P(BS‑co‑40%BA)>P(BS‑co‑60%BA)>P(BS‑co‑80%BA)>P(BS‑co‑20%BA)>poly(butylene adipate)(PBA)>poly(butylene adipate)(PBS).The thermal stability and degradation performance of P(BS‑co‑40%BA)were both better than those of pure PBA,indicating that P(BS‑co‑40%BA)is an optimal product with the best performance.