Preparation, Characterization, and Foaming Behavior of Poly(lactic acid)/Poly(butylene adipate-co-butylene terephthalate) Blend
Preparation, Characterization, and Foaming Behavior of Poly(lactic acid)/Poly(butylene adipate-co-butylene terephthalate) Blend
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DOI：
10.1002/pen.21287
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发表时间：
2009-05
影响因子：
3.2
通讯作者：
Hua Yuan;Zhiyong Liu;Jie Ren
中科院分区：
文献类型：
--
作者：
Hua Yuan;Zhiyong Liu;Jie Ren
近年来，聚乳酸（PLA）泡沫塑料在包装领域中逐渐取代传统的聚合物泡沫塑料。不幸的是，由于PLA的低粘度和弹性，其发泡速率低。为了克服这些缺点，一种可生物降解的聚酯，聚（己二酸丁二醇酯-共-对苯二甲酸酯）（PBAT）与聚乳酸共混，以改善聚乳酸的熔融性能。此外，马来酸酐（MAH）和2，5-二甲基-2，5-二（叔丁基过氧）己烷（L101）的加入，以改善PLA与PBAT的相容性。使用双螺杆挤出机将共混物挤出成泡沫。采用FTIR、DSC、战神流变仪、SEM等对共混物的性能进行了表征。结果表明，PLA/PBAT共混物的复数粘度比纯PLA提高近100%。同时，PLA/PBAT共混物发泡后泡孔结构更大，泡孔分布更均匀。PLA/PBAT共混泡沫的发泡速率比纯PLA泡沫提高近50%。Polym.工程科学，2009.© 2009年塑料工程师协会
In resent years, poly(lactic acid) (PLA) foams have been studied to replace traditional polymer foams in packaging field. Unfortunately, the foaming rate of PLA is low due to its low viscosity and elasticity. To overcome these shortcomings, a biodegradable polyester, poly(butylene adipate-co-terephthalate) (PBAT) was blended with PLA to improve melt properties of PLA. Additionally, maleic anhydride (MAH) and 2,5-dimethyl-2,5-di-(tert-butylperoxy)hexane (L101) were added to improve the compatibility of PLA with PBAT. The blends were extruded into foams using a twin-screw extruder. The properties of extrudates were characterized by FTIR, DSC, ARES Rheometer, and SEM. The results show that complex viscosity of PLA/PBAT blend increases by nearly 100% compared with pure PLA. Meanwhile, cell structure of foamed PLA/PBAT blend is much larger and the distribution of cells is more homogenous. The foaming rate of PLA/PBAT blend foams is raised by nearly 50% than that of pure PLA foams. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers