Preparation of stiffer ternary blends of polypropylene/polyamide 6/biodegradable polymers with improved interfacial adhesion,Journal of Applied Polymer Science

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Preparation of stiffer ternary blends of polypropylene/polyamide 6/biodegradable polymers with improved interfacial adhesion
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-11-04 , DOI: 10.1002/app.50248
Bruno de P. Amantes _{1,

2} , Renato Jonas B. Oliveira _{1,

2} , Maria de Fátima V. Marques _{1,

2}

Affiliation

Blends of polypropylene (PP), polyamide 6 (PA6), and biodegradable polymers (BPs) such as poly(D,L‐lactic acid) (PDLLA), poly(lactic acid‐co‐ε‐caprolactone) (poly[LA‐co‐ε‐CL]) and poly(ε‐caprolactone) (PCL) were prepared using a twin‐screw mini‐extruder. The composition of the blend PP/PA6 was fixed at a mass proportion of 70/30, and the compatibilized blends contain 5 wt% of each BP. The morphology observed through scanning electronic microscopy, the dynamic mechanical thermal properties (DMTA), and the biodegradation test after composting and performing optical microscopy (OM) of the blends were investigated. The blend PP/PA6 compatibilized with polypropylene grafted with maleic anhydride (PPMA) was also obtained and used as a reference. The results showed that the PP/PA6/PPMA revealed a more homogeneous morphology and resulted in higher modulus; nevertheless, the sample obtained with the lower molar mass PDLLA as an alternative for PPMA showed a storage modulus behavior close to the reference material. Poly(LA‐co‐ε‐CL) and PCL also showed changes in the morphology of the PA6 dispersed phase. Positive results were observed in the biodegradation test examined by OM for all samples containing BPs. The novelty of this work was to employ BPs as compatibilizing agents of the blends comprising PP/PA6, producing ternary blends with superior mechanical properties due to the better dispersion of the phases.

中文翻译：

制备具有改善的界面粘合性的聚丙烯/聚酰胺6 /可生物降解聚合物的硬质三元共混物

聚丙烯（PP），聚酰胺6（PA6）和可生物降解的聚合物（BP）的混合物，例如聚（D，L-乳酸）（PDLLA），聚（乳酸-共-ε-己内酯）（聚[LA- co-ε-CL]）和聚（ε-己内酯）（PCL）使用双螺杆微型挤出机制备。PP / PA6共混物的组成以70/30的质量比固定，并且相容的共混物包含5 wt％的每个BP。研究了通过扫描电子显微镜观察的形态，动态机械热性能（DMTA）以及堆肥并进行了光学显微镜（OM）处理后的生物降解测试。还获得了与接枝有马来酸酐（PPMA）的聚丙烯相容的共混物PP / PA6，并用作参考。结果表明，PP / PA6 / PPMA的形貌更均匀，模量更高。但是，用较低摩尔质量的PDLLA替代PPMA所获得的样品显示出的储能模量性能接近于参考材料。聚（LA-co-ε-CL）和PCL也显示PA6分散相的形态发生了变化。在OM检查的所有含有BP的样品的生物降解测试中均观察到阳性结果。这项工作的新颖之处在于将BP用作包含PP / PA6的共混物的增容剂，由于相的分散性更好，因此生产出具有优异机械性能的三元共混物。在OM检查的所有含有BP的样品的生物降解测试中均观察到阳性结果。这项工作的新颖之处在于将BP用作包含PP / PA6的共混物的增容剂，由于相的分散性更好，因此生产出具有优异机械性能的三元共混物。在OM检查的所有含有BP的样品的生物降解测试中均观察到阳性结果。这项工作的新颖之处在于将BP用作包含PP / PA6的共混物的增容剂，由于相的分散性更好，因此生产出具有优异机械性能的三元共混物。

更新日期：2020-11-25

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