Abstract:
Composites of Acrylic Rubber (AR) filled with anhydrous copper sulfate (CuSO
4) particles were prepared by planetary ball mill directly.A coordination reaction between AR and CuSO
4 was generated by heat pressing at 180℃.After ball milling,the average particle size of CuSO
4 decreased significantly (from 9.88
μm to 1.03
μm),and the size distribution was narrow.The composites were characterized by electron spin resonance (ESR),X-ray photoelectron spectroscopy (XPS),ultraviolet-visible spectroscopy,dynamic mechanical analysis (DMA),scanning electron microscope (SEM).Results showed that the tensile strength increased by 120% for composite with 2.9% (mass fraction) CuSO
4 compared to that with 4.8% CuSO
4 reported in previous papers although the mass fraction CuSO
4 decreased by 40%.By analyzing SEM photos,the particle size and size distribution of CuSO
4 in the composite were improved significantly.ESR and XPS spectra confirmed the coordination reaction between AR and CuSO
4.DMA showed that the composite became more rigid than AR due to the coordination.