A series of chiral optically active monomers were prepared from l-amino acids with different structures. These monomers were polymerized to chiral polyamide-imides (PAIs) via an eco-friendly direct polycondensation process. The glass transition temperature (Tg) values were obtained by differential scanning calorimetry (DSC), and showed that the rigid and bulk effect of the substituents will co-affect the Tg values of the polymers. Their degradability were studied via soil degradation experiments, and the variations of water contact angles, molecular weights, structure and appearance during degradation were characterized by contact angle tester, gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM) respectively. The results revealed that the damages of polymer chains started with the amide bonds, and then proceed to the imide rings. With degradation, PAI films' hydrophilicity raised, and when introduced amino acids with longer carbon chain or bulky ring into the polymers' backbone, their degradability decreased.

一系列手性的光学活性单体的从制备升-具有不同结构的氨基酸。这些单体通过环保的直接缩聚工艺聚合为手性聚酰胺酰亚胺（PAI）。通过差示扫描量热法（DSC）获得玻璃化转变温度（Tg）值，并表明取代基的刚性和体积效应将共同影响聚合物的Tg值。通过土壤降解实验研究了它们的降解性，并通过接触角测试仪，凝胶渗透色谱法（GPC），傅立叶变换红外光谱法（FTIR）和扫描电子显微镜表征了降解过程中水接触角，分子量，结构和外观的变化。 （SEM）。结果表明，聚合物链的破坏始于酰胺键，然后发展到酰亚胺环。