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采用熔融共混法制备了聚丙烯(PP)/废印刷电路板非金属粉(废PCB粉)共混体系,利用动态力学性能分析法(DMA)研究了废PCB粉含量、改性剂聚丙烯接枝马来酸酐(PP-g-MAH)及振动频率对共混体系动态力学性能的影响。实验结果显示:PP/废PCB粉共混体系的储能模量和损耗模量较纯PP均有所增大,且随废PCB粉含量的增加进而增大,力学损耗因子峰值和玻璃化转变温度则有所下降;相容剂PP-g-MAH的加入使废PCB粉和PP之间形成较牢固的界面层,使共混体系储能模量较改性前进一步增加,而损耗模量和力学损耗因子峰值较改性前有所减小;振动频率对共混体系的动态力学性能亦有一定影响,随振动频率的增加,共混体系的储能模量提高,损耗模量和力学损耗因子峰值则有所减小。
The blend system of PP / waste PCB powder was prepared by melt blending method. The content of waste PCB powder, the content of modifier polypropylene Effect of Grafted Maleic Anhydride (PP-g-MAH) and Vibrational Frequencies on Dynamic Mechanical Properties of Blends. The experimental results show that the storage modulus and loss modulus of PP / waste PCB powder blend system are increased compared with pure PP, and with the increase of waste PCB powder content, the peak of mechanical loss factor and glass transition Temperature was decreased. The addition of compatibilizer PP-g-MAH resulted in a stronger interfacial layer between waste PCB powder and PP, which increased the storage modulus of blend system further than that before modification, while the loss modulus And the peak value of mechanical loss factor decreased compared with that before modification. The vibration frequency also had certain influence on the dynamic mechanical properties of the blends. With the increase of the vibration frequency, the storage modulus of blends increased, the loss modulus and mechanics The loss factor peak is reduced.