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首页> 外文期刊>Journal of Applied Polymer Science >A comparative study on the effect of different reactive compatibilizers on injection-molded pieces of bio-based high-density polyethylene/polylactide blends
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A comparative study on the effect of different reactive compatibilizers on injection-molded pieces of bio-based high-density polyethylene/polylactide blends

机译：不同反应性增容剂对生物基高密度聚乙烯/聚乳糖共混物的注塑成型件作用的对比研究

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摘要

The present study reports on the development of binary blends consisting of bio-based high-density polyethylene (bio-HDPE) with polylactide (PLA), in the 5-20 wt % range, prepared by melt compounding and then shaped into pieces by injection molding. In order to enhance the miscibility between the green polyolefin and the biopolyester, different reactive compatibilizers were added during the melt-blending process, namely polyethylene-grafted maleic anhydride (PE-g-MA), poly(ethylene-co-glycidyl methacrylate) (PE-co-GMA), maleinized linseed oil (MLO), and a combination of MLO with dicumyl peroxide (DCP). Among the tested compatibilizers, the dual addition of MLO and DCP provided the binary blend pieces with the most balanced mechanical performance in terms of rigidity and impact strength as well as the highest thermal stability. The fracture surface of the binary blend piece processed with MLO and DCP revealed the formation of a continuous structure in which the dispersed PLA phase was nearly no discerned in the bio-HDPE matrix. The resultant miscibility improvement was ascribed to both the high solubility and plasticizing effect of MLO on the PLA phase as well as the crosslinking effect of DCP on both biopolymers. The latter effect was particularly related to the formation of macroradicals of each biopolymer that, thereafter, led to the in situ formation of bio-HDPE-co-PLA copolymers and also to the development of a partially crosslinked network in the binary blend. As a result, cost-effective and fully bio-based polymer pieces with improved mechanical strength, high toughness, and enhanced thermal resistance were obtained. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47396.
机译：本研究报告了由熔融配合制备的5-20wt％范围内的生物基高密度聚乙烯（Bio-HDPE）与生物基高密度聚乙烯（Bio-HDPE）组成的二元共混物的发展，然后通过注射成形为片材成型。为了增强绿色聚烯烃和杀菌酶之间的混合物，在熔融共混过程中加入不同的反应性增容剂，即聚乙烯接枝的马来酸酐（PE-G-MA），聚（乙烯 - 共缩水甘油酯）（甲基丙烯酸乙二醇酯）（ PE-Co-GMA），马来因的亚麻籽油（MLO）和MLO与过氧化二琥基（DCP）的组合。在测试的兼容器中，MLO和DCP的双重添加件在刚性和冲击强度以及最高的热稳定性方面提供了二元混合物。与MLO和DCP处理的二元共混物片的断裂面显示的连续结构，其中聚乳酸分散相，几乎没有在生物HDPE矩阵辨别的形成。由此产生的混溶性改善归因于MLO对PLA阶段的高溶解度和塑化作用以及DCP对两个生物聚合物的交联效应。后一种效果特别是与每种生物聚合物的大roradicals的形成相关，此后，导致Bio-HDPE-Co-PLA共聚物的原位形成以及在二元共混物中的部分交联网络的发展。结果，获得了具有改善的机械强度，高韧性和增强的热阻的具有成本效益和完全生物的聚合物件。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47396。

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