Silane and polymer treatment of calcium carbonate particles and mechanical properties of the filled poly(vinyl chloride)

摘要

The effect of the surface treatment of ground calcium carbonate particles with a silane coupling agent or polymer on the yield strength was investigated in the particle-filled poly (vinyl chloride). First, the particles were treated withγ-aminopropyl methyldiethoxysilane as a silane coupling agent, however, there was no influence of the treatment on the improvement of yield strength. Second, the polymer treatment using poly(methyl methacrylate) containing carboxyl groups was carried out, because poly(methyl methacrylate) has well compatibility with poly(vinyl chloride) matrix. The particles having mean size of about 1μm were treated with the polymer through the acetone solution. A portion of the matrix poly (vinyl chloride) was also added in the solution during the treatment process to improve the dispersibility of particles in the matrix. The composite was prepared using the obtained mixture and the tensile test was carried out. As a result, it was found that the polymer treatment was useful to improve the yield strength of calcium carbonate particle-filled poly (vinyl chloride).