聚(己二酸/丁二醇-co-己二酸/乙醇胺)的合成

Study on the synthesis of poly(butylene adipate-co-amidoethyl adipate) polyesteramide

以1,4-丁二醇、己二酸和乙醇胺为原料合成了聚(己二酸/丁二醇-co-己二酸/乙醇胺)(PBEA)预聚体,再以对苯二甲酰双己内酰胺(TBC)为扩链剂对其进行扩链,合成出了高分子量的聚酯酰胺。研究了预聚体分子量、扩链剂/预聚体摩尔比、反应温度等因素对扩链反应的影响。在扩链温度为220℃,预聚体的分子量为1700左右,扩链剂/预聚体的摩尔比为1.1时,扩链效果最好,所得PBEA的特性黏度达0.82 dL/g。并采用GPC和DSC分别对扩链前后的聚酯酰胺的分子量和熔点进行了表征,发现其分子量成倍增加,而熔点则有所降低。

The HO-terminated prepolymer of poly(butylene adipate-co-amidoethyl adipate) (PBEA) was prepared by the polycondensation of adipic acid with ethanolamine and excessive 1,4-butanediol.Polyesteramide PBEA with high molecular weight was synthesized by a chain-extending reaction from the HO-terminated PBEA prepolymer with terephthaloyl bis-caprolactamate(TBC) as chain-extender under reduced pressure in bulk state.The influencing factors on the chain-extending reaction were studied.At 220 ℃ and TBC/PBEA prepolymer molar ratio of 1.1,the PBEA with intrinsic viscosity of 0.82 dL/g was obtained.The PBEA prepolymer and the chain-extended PBEA were also characterized by GPC and DSC spectra,respectively.The molecular weight of the PBEA after the chain extension was increased evidently but the melting point decreased.