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Mechaical and morphological behavior of polyolefin blends in the presence of CaCO_3

机译：CaCO3存在下聚烯烃共混物的力学和形态学行为

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摘要

The aim of the present work is to study the properties of blends of Polypropylene (PP) with virgin and recycled high density polyethylene (r-HDPE) (80/20), functionalized and non-functionalized EPR (5 wt/100), and calcium carbonate (30/100) as it is untreated or treated with a 1/100 by weight of coupling titillate agent. The mechanical behavior of PP/HDPE/EPR blends showed that functionalization was not effective. When blends of PP/HDPE/EPR with treated or untreated filler were compared to the equivalent ones, but with recycled HDPE and untreated filler, a slight increase was observed in elongation at break and a decrease in Young's modulus and impact strength. This behavior may suggest that recycled HDPE and EPR together act as a plastifier in these blends. It was also found that the use of treated calcium carbonate did not contribute to obtain better mechanical properties. From these results it can be concluded that it is possible to recycle HDPE in blends with PP and non-functionaized EPR (nf-EPR), using untreated calcium carbonate as a filler, and that this offers economic advantages and produces a material with mechanical properties comparable to those of the compounds of PP with filler.
机译：本工作的目的是研究聚丙烯（PP）与原始和回收的高密度聚乙烯（r-HDPE）（80/20），官能化和非官能化EPR（5 wt / 100）的共混物的性能，以及未处理的碳酸钙（30/100）或用1/100重量的偶合滴定剂处理过的碳酸钙。 PP / HDPE / EPR共混物的机械性能表明，功能化无效。当将PP / HDPE / EPR与处理过的或未处理的填料的共混物与同等的混合物进行比较时，但与回收的HDPE和未处理的填料相比，断裂伸长率略有增加，杨氏模量和冲击强度降低。这种现象可能表明，回收的HDPE和EPR在这些混合物中共同充当增塑剂。还发现使用处理过的碳酸钙不能有助于获得更好的机械性能。从这些结果可以得出结论，使用未处理的碳酸钙作为填料，可以将HDPE与PP和非官能化EPR（nf-EPR）的混合物进行回收，这具有经济优势并生产出具有机械性能的材料可与具有填料的PP化合物相比。

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