ABSTRACT

In this work, the non-metals recycled from waste printed circuit boards (NPCBs) are used as the reinforcing filler for polypropylene (PP) composites. The effects of particle size, surface modification, compatibiliser and NPCB content are evaluated by the detailed investigation of mechanical, morphology, crystallisation and melting behaviour. Mechanical test results showed that NPCBs could increase the tensile and flexural strength of composites significantly, which is further confirmed by the strong interfacial adhesion in scanning electron microscopy (SEM) observation. Meanwhile, differential scanning calorimetry (DSC) results indicate the heterogeneous nucleation effect of NPCBs. The crystallisation temperature (T _c), nucleation and crystallisation rate, and crystallinity of composites are all increased in the presence of NPCBs. The perfect degree of crystal, melting temperature (T _m), and the thickness and size of PP wafers were all decreased. The above results present a high-value reuse of NPCBs in high-performance PP composites.

摘要

在这项工作中，将从废印刷电路板（NPCB）回收的非金属用作聚丙烯（PP）复合材料的增强填料。粒度，表面改性，增容剂和NPCB含量的影响通过对机械，形态，结晶和熔融行为的详细研究来评估。力学测试结果表明，NPCBs可以显着提高复合材料的拉伸和弯曲强度，这在扫描电子显微镜（SEM）观察中具有很强的界面粘附力进一步得到证实。同时，差示扫描量热法（DSC）结果表明NPCB的异质成核作用。结晶温度（T _cNPCBs的存在，复合材料的成核和结晶速率以及结晶度均增加。降低了结晶度，熔化温度（T _m）以及PP晶片的厚度和尺寸。以上结果表明，NPP在高性能PP复合材料中具有高价值的重复利用。