电子废弃物中ABS的增韧增强改性

Toughening and Strengthening Modification of ABS from ElectronicWaste

利用nano-CaCO_3和硅烷偶联剂KH-550,通过熔融共混法对电子废弃物中ABS进行了增韧增强改性,并对再生ABS复合材料的微观结构和力学性能进行了研究。结果表明,与单独添加nano-CaCO_3对比,添加KH-550偶联剂后,nano-CaCO_3分散得更均匀,团聚明显减少;在拉伸强度方面,与废弃ABS相比,单独添加nano-CaCO_3的情况下,添加量为3%时,再生ABS复合材料的拉伸强度提高10.7%,在加入0.5%偶联剂KH-550的情况下,nano-CaCO_3添加量为5%时,拉伸强度提高17.7%;在冲击强度方面,单独添加nano-CaCO_3时,添加量为1%时,再生ABS复合材料的无缺口冲击强度提高3.8%,在加入0.5%偶联剂KH-550的情况下,nano-CaCO_3添加量为3%时,无缺口冲击强度提高35%。总之,在加入偶联剂的情况下,再生复合材料的力学性能会有更大幅度的提高,但相对应的nano-CaCO_3添加量更大一些。

The abandoned ABS plastic from electronic waste was toughened and strengthened through melt blending with calcium carbonate nanoparticles(nano-CaCO3)and silane coupling agent KH-550.The mechanical properties and microstructure of the samples were analyzed.The results showed that when coupling agent KH-550was added,the dispersion of the nano-CaCO3in the recycled ABS composites was better than the composites in which only nano-CaCO3was added to.The agglomerations of particles were also reduced.Compared with the abandoned ABS,the tensile strength of the recycled ABS composites with3%nano-CaCO3was improved by10.7%;the recycled ABS composite with5%nano-CaCO3and0.5%KH-550was improved by17.7%.The non-notched impact strength of the recycled ABS composite with1%nano-CaCO3was improved by3.8%,and the recycled ABS composite with3%nano-CaCO3and0.5%KH-550was improved by35%.The mechanical properties could be improved more when coupling agent KH-550was added,while the corresponding ratios of nano-CaCO3were also higher.