Structure development in thermoset recyclate‐filled polypropylene composites

摘要: Polypropylene containing comminuted fiber reinforced thermoset recyclate has been shown to exhibit enhanced mechanical properties relative particulate-filled materials. Optimum performance in these recyclate-filled materials is achieved compositions made from rubber-modified polypropylene maleic anhydride-modified PP conjunction with silane coupling agent. Although matrix crosslinking was found enhance both filled and unfilled systems, composite are dominated by the development of strong interfacial bonding between reinforcement. A mechanism for formation proposed involving reaction anhydride functionalized PP, trisilanol groups their subsequent condensation hydroxyl on surfaces, together molecular entanglement co-crystallization grafted ungrafted molecules. Furthermore, absence treatment there evidence that elastomer particles encapsulate filler particles. However, this effect strongly hindered when functionalized-PP added, either isolation or combination co-treatment. The crystalline nucleation also considered. system investigated promote polyester (DMC) woven glass-reinforced phenolic recyclates investigated, suggesting it may be suitable treating mixed scrap.