Poly[(R)3-hydroxybutyrate] (PHB)/poly(l-lactic acid) (PLLA) blends with poly(PHB/PLLA urethane) as a compatibilizer

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• 作者：Kai-Wei Lin^a ; Ching-Hung Lan^a ; Yi-Ming Sun^a ; ^b ; ^c ; ^{cesunym@saturn.yzu.edu.tw}
• 关键词：Poly(3-hydroxybutyrate) ; Poly(lactic acid) ; Blend ; Bio-based ; Compatibilizer
• 刊名：Polymer Degradation and Stability
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：134
• 期：Complete
• 页码：30-40
• 全文大小：2548 K
• 卷排序：134

文摘

Poly(PHB/PLLA urethane) (poly(ester urethane), PEU) was synthesized with telechelic poly[(R)3-hydroxybutyrate]-diol (PHB-diol) and poly(l-lactic acid)-diol (PLLA-diol). The miscibility of cast PHB/PLLA blends was enhanced by adding PEU as a compatibilizer, as observed by DSC, WAXS, SAXS, alkaline solution etching test and mechanical properties measurement. It is shown that the crystalline unit cells of PHB and PLLA didn't interfere with each other and the biphasic separation was kept in the blends with PEU. However, the miscibility of PHB/PLLA in the amorphous phase of the blends was improved due to the presence of PEU. The changes of their thermal properties and morphology of the phase boundaries indicated the enhanced miscibility of PHB/PLLA blends by adding PEU. The mechanical properties of PHB/PLLA blends with PEU were amended due to the better entangled amorphous polymer chains. The results demonstrated that PEU was a good compatibilizer for PHB/PLLA blends.