本論文以生物可降解型聚酯類的聚己二酸共對苯二甲酸丁二酯(polybutylene adipate-co-terephthalate, PBAT)為基材，利用溶液及熔融共混方式分別與天然黏土(蒙脫土)和有機改質黏土製備有機無機混摻複合材料。經由不同混摻條件下製備的混摻複合材料，探討其拉伸、熱學、結晶、型態、降解及透濕等物性行為，以評估此類生物可降解聚酯做為包裝材的應用潛力。
首先，經由混摻複材的特性研究發現PBAT與有機改質黏土的混摻複材其表面型態較為平滑，且有機改質黏土的矽酸鹽層在基材中分散較為細小且均勻。而加入有機改質粘土可提高PBAT基材的冷卻結晶溫度，並可以提高PBAT混摻複材的熱穩定性，同時因為有機黏土矽酸鹽層的屏蔽作用，使得水蒸氣通過率大幅的降低。另一方面，利用順丁烯二酸酐接枝的PBAT與不同黏土混摻複合材料的研究中，PBAT與順丁烯二酸酐接枝反應後將導致聚合物基材和矽酸鹽層產生化學或物理鍵結的形成，從而改變有機黏土的分散並與聚合物基材形成交互作用。此外，可發現PBAT基材表面的酸酐基可增加材料的親水性，從而使酵素藉由水做為介質更容易接觸到分子鏈上的酯鍵而產生降解的效果，致使順丁烯二酸酐接枝PBAT系列的混摻材料表現出更快的酵素降解速率。

Nanocomposites of poly(butylene adipate-coterephthalate) (PBAT) with montmorillonite (MMT) nanoparticles were prepared via solution and melt blending. Natural MMT was modified by octadecylamine (ODA) or dihexylamine (DHA). Intercalation of the organoclay in the PBAT matrix was studied by X-ray diffraction (XRD). The results from scanning electron microscope (SEM) showed that the surface morphology of nanocomposite of PBAT/ODA-modified MMT was smoother than that of PBAT/neat MMT. From the results of transmission electron microscope (TEM), the dispersion of ODA-modified MMT in the PBAT matrix was finer than that of neat MMT. The addition of organoclay can increase the cooling crystallization temperature of PBAT, as observed by differential scanning calorimetry (DSC). Furthermore, the addition of ODA-modified MMT can improve the thermal stability of PBAT nanocomposites, according to the results of thermogravimetric analyzer (TGA). The tensile strength was little affected, while the Young’s modulus was increased with the clay content. The photo degradation and the hydrolysis of PBAT were reduced by the addition of MMT and ODA-modified MMT. On the other hand, neat PBAT was grafted with maleic anhydride via melt grafting process. By the grafting of PBAT with maleic anhydride (MA), the enzymatic biodegradation of hybrids was increased, while the photodegradation of PBAT was reduced. Furthermore, although the hydrophilicity was increased, the transmission of water vapor was reduced by the addition of organically modified MMT.

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