The reinforcement of recycled polypropylene (rPP) with mineral fillers, to obtain modulus values of 3000–4000 MPa has proven challenging for recyclers, whereas this is common practice for virgin PP. The main difference between recycled and virgin PP is the contaminating presence of other polymers. In this study, the composition of rPP sourced from electrical and electronic waste was analytically estimated. The rPP was found to be a PP/HDPE blend with ca. 90/10 m% ratio. Furthermore, the effect of HDPE on the thermal and physical properties of talc-filled PP was investigated by means of re-engineered blends and talc-filled compounds. It was found that HDPE has a profound effect on the degree to which rPP can be reinforced by talc. However, the quantified effects of the HDPE alone were not of sufficient magnitude to account for the full difference in properties between talc-filled rPP and virgin PP.

用矿物填料增强再生聚丙烯（rPP）以获得3000-4000 MPa的模量值已被证明对回收商具有挑战性，而这对于纯PP来说是常见的做法。再生PP和原始PP之间的主要区别是存在其他聚合物的污染。在这项研究中，分析估计了源自电气和电子废物的rPP的成分。发现rPP是具有约CA的PP / HDPE混合物。90/10 m％的比例。此外，通过重新设计的混合物和滑石填充的化合物，研究了HDPE对滑石填充的PP的热和物理性能的影响。发现HDPE对滑石粉可增强rPP的程度具有深远的影响。但是，仅HDPE的量化效果不足以说明滑石粉填充的rPP和纯PP之间的性能差异。