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Effect of Peroxide and Organoclay on Thermal and Mechanical Properties of PLA in PLA/NBR melted blend

机译：过氧化物和有机粘土对PLA / NBR熔化混合物中PLA热和力学性能的影响

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Acrylonitrile butadiene rubber, NBR, was added to poly(lactic acid), PLA, in order to improve the brittleness of PLA. NBR with the content of CN 34 % was melt blended into PLA. This work was carried out in three parts. NBR with the content of 5, 10, 15, 20, 15, 20, 25 and 30 % by weight was melt blended in an internal mixer. The second part, PLA, with the same contents as the first part, was melt blended with NBR compound (using dicumyl peroxide, DCP as vulcanizing agent) was dynamic vulcanized by melt blending with PLA in an internal mixer. Organic modified montmorillonite (OMMT), Cloisite 30B~R, was added into NBR together with DCP. Cloisite 30B filled NBR compound was dynamic vulcanized with PLA by melt blending in the internal mixer. In the third part, the composition of NBR added in the blend was at 20, 25 and 30 % by weight. The results showed phase separation between PLA and NBR. Tensile strength and tensile modulus were found decreased with the content of NBR whereas elongation at break was increased with NBR content, up to 10 % NBR, then the elongation was decreased. Thermal stability of PLA was enhanced by the addition of NBR. For dynamic vulcanized NBR in PLA, the two phases was shown more compatible. Tensile elongation of PLA/dynamic vulcanized NBR blend was improved about 700-1100% compared to neat PLA. It was found that at 20 % of NBR tensile elongation was increased about 1120%. Tensile strength and modulus of thermoplastic vulcanizate of PLA/NBR (PLA/NBR TPV) were found decreased 37% and 65 % respectively, compared to neat PLA. The PLA/NBR TPV showed drawback in crystallization meanwhile thermal stability was very much improved. In order to improve mechanical properties of PLA/NBR TPV, OMMT was added. The results showed that modulus and tensile strength were enhanced whereas elongation at break was suffered due to the distribution of OMMT. It was shown in the form of aggregate rather than intercalated and exfoliated.
机译：将丙烯腈丁二烯橡胶，NBR加入到聚（乳酸），PLA中，以改善PLA的脆性。将CN 34％含量的NBR熔融混合到PLA中。这项工作是三个部分进行的。 NBR含量为5,10,15,20,15,20,25和30重量％的熔融混合在内部混合器中。具有与第一部分相同的内容物的第二部分PLA与NBR化合物（使用二磺酰基）熔融混合（使用二磺酰基，作为硫化剂的DCP）通过在内部混合器中用PLA熔融混合而硫化硫化。将有机改性的蒙脱石（OMMT），Cloisite 30B〜R与DCP一起加入NBR。 Cloisite 30B填充的NBR化合物通过在内部混合器中熔融共混，通过PLA致强硫化。在第三部分中，在共混物中加入的NBR的组成为20,25和30重量％。结果显示PLA和NBR之间的相分离。发现拉伸强度和拉伸模量随NBR的含量而降低，而断裂伸长率随NBR含量而增加，高达10％NBR，则伸长率降低。通过添加NBR，增强了PLA的热稳定性。对于PLA中的动态硫化NBR，两个阶段显示更加兼容。与整齐的PLA相比，PLA /动态硫化NBR混合物的拉伸伸长率提高了约700-1100％。发现，在20％的NBR拉伸伸长率增加约1120％。与整洁PLA相比，发现PLA / NBR（PLA / NBR TPV）的拉伸强度和热塑性硫化酸模量分别下降了37％和65％。 PLA / NBR TPV显示出结晶的缺点同时热稳定性非常好。为了改善PLA / NBR TPV的机械性能，加入OMMT。结果表明，增强模量和拉伸强度提高，而断裂伸长率由于OMMT的分布而受到突破。它以骨料的形式显示而不是插入和剥离。

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