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首页> 外文期刊>Progress in Rubber,Plastics and Recycling Technology >Formation of high-density polyethylene-poly(ethylene-octene) core-shell particles in recycled poly(ethylene terephthalate) by reactive blending
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Formation of high-density polyethylene-poly(ethylene-octene) core-shell particles in recycled poly(ethylene terephthalate) by reactive blending

机译：通过反应混合形成再循环聚（乙二醇酯）中的高密度聚乙烯 - 聚（乙烯 - 辛烯）核 - 壳颗粒

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Recycled poly(ethylene terephthalate) (R-PET)/high-density polyethylene (HDPE)/glycidyl methacrylate grafted poly(ethylene-octene) (mPOE) blends, in which the binary (HDPE/mPOE) dispersed phase was of a HDPE core-mPOE shell structure, were prepared. For this purpose, HDPE-g-mPOE graft copolymers were prepared in HDPE/mPOE blends via reactive extrusion with the presence of the free radical initiator dicumyl peroxide (DCP). Then, R-PET was blended with the HDPE/mPOE blends by melt extrusion. The effect of the DCP and mPOE content in the HDPE/mPOE blends on the phase morphology and mechanical properties of the R-PET/HDPE/mPOE blends were studied systematically. It was found that the blends containing reactive compatibilizer exhibited the encapsulation of the HDPE by the mPOE, forming core-shell particles dispersed phase morphology. The graft chains of HDPE-g-mPOE-g-PET formed by the in situ reaction between R-PET and mPOE phases reduced the interfacial tension. Consequently, the dispersed phase morphology was observed to form smaller diameter core-shell particles. The resultant blends exhibited an effect on both the thermal and mechanical properties. Differential scanning calorimetric analysis showed the dispersed phase particles could act as a nucleating agent in the R-PET matrix to improve the crystallization temperature, while the graft copolymers formed in the compatibilized R-PET/HDPE/mPOE blend decreased the nucleation activity. Notched Charpy impact strength and elongation at break of the R-PET were improved by forming the core-shell particles dispersed phase morphology.
机译：再循环聚（乙烯苯二甲酸乙二醇酯）（R-PET）/高密度聚乙烯（HDPE）/甲基丙烯酸缩水甘油酯接枝聚（乙烯 - 辛烯）（MPOE）共混物，其中二元（HDPE / MPOE）分散相是HDPE核心-mopoe壳结构，制备。为此目的，通过具有自由基引发剂Dicumylide（DCP）的反应性挤出，在HDPE-G-MPOE接枝共聚物中制备HDPE-G-MPOE接枝共聚物。然后，通过熔融挤出与HDPE / MPOE共混物混合R-PET。系统地研究了DCP / MPOE中的DCP和MPOE含量在HDPE / MPOE共混物上的影响，并对R-PET / HDPE / MPOE共混物的相位形态和机械性能进行了系统地研究。发现含有反应性增容剂的共混物通过MPOE表现出HDPE的包封，形成核壳颗粒分散相形态。通过R-PET和MPOE相之间的原位反应形成的HDPE-G-MPOE-G-PET的移植链降低了界面张力。因此，观察到分散相形态以形成较小的直径核 - 壳颗粒。所得共混物对热和机械性能的影响表现出效果。差分扫描量热分析显示分散相颗粒可以用作R-PET基质中的成核剂以改善结晶温度，而在相容化的R-PET / HDPE / MPOE共混物中形成的接枝共聚物降低了核心活性。通过形成核 - 壳颗粒分散相形态，改善了R-PET的凹凸冲击强度和伸长率。

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