Poly(lactic acid) properties as a consequence of poly(butylene adipate-co-terephthalate) blending and acetyl tributyl citrate plasticization
Poly(lactic acid) properties as a consequence of poly(butylene adipate-co-terephthalate) blending and acetyl tributyl citrate plasticization
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DOI：
10.1002/app.28512
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发表时间：
2008-10-15
影响因子：
3
通讯作者：
Ciardelli, Francesco
中科院分区：
文献类型：
--
作者：
Coltelli, Maria-Beatrice;Della Maggiore, Irene;Ciardelli, Francesco
本研究旨在通过添加低分子量增塑剂乙酰柠檬酸三丁酯 (ATBC) 和可生物降解的脂肪族-芳香族共聚酯聚己二酸-对苯二甲酸丁二醇酯 (PBAT) 来调节聚乳酸 (PLA) 的性能。在不连续实验室混合器中制备含有 10-35 wt% ATBC 和/或 PBAT 的 PLA/PBAT、PLA/ATBC 和 PLA/PBAT/ATBC 混合物，压缩成型，并通过热、形态和机械测试进行表征，以评估增塑剂或共聚物的浓度对最终材料柔韧性的影响。获得了具有可调节性能、杨氏模量在 100-3000 MPa 范围内、断裂伸长率在 10-300% 范围内的材料。此外，热分析显示 ATBC 在 PBAT 相中优先溶解。还进行了透气性测试以评估其在食品包装应用中的可能用途。在确定相形态和最终性能时，特别强调了塑化对物理共混的影响，讨论了结果。 (c) 2008 年 Wiley 期刊公司。
This study was aimed at the modulation of poly(lactic acid) (PLA) properties byt he addition of both a low-molecular-weight pasticizers, acetyl tributyl citrate (ATBC), and a biodegradable aliphatic-aromatic copolyester, poly(butylene adipate-co-terephthalate) (PBAT). PLA/PBAT, PLA/ATBC, and PLA/PBAT/ATBC mixtures with 10-35 wt % ATBC and/or PBAT were prepared in a discontinuous laboratory mixer, compression-molded, and characterized by thermal, morphological,a nd mechanical tests to evaluate the effect of the concentration of either the plasticizers or copolymers ob the final material flexibility. Materials with modulable properties, Young,s modulus in the range 100-3000 MPa and elongation at break in the range 10-300%, were obtained. Moreover, thermal analysis showed a preferential solubilization of ATBC in the PBAT phase. Gas permeability tests were also performed to assess possible use in food packaging applicaitons. The results are discussed with particular emphasis toward the effects of plasticization on physical blending in the determination of the phase morphology and final properties. (c) 2008 Wiley PEriodicals, Inc.