Effect of foaming agent on microcellular unsaturated polyester

摘要

Microcellular unsaturated polyester was prepared by different foaming agents was studied.Compared with the cell size and density of microcellular unsaturated polyester prepared using azodicarbonamide (AC),the ones of microcellular unsaturated polyester prepared using NaHCO3 were small.For NaHCO3,the cell density of microcellular unsaturated polyester decreased with the increasing temperature.For microcellular unsaturated polyester prepared using NaHCO3 at 100 °C,the average cell size was about 18 μm and the cell density was 1.1 × 1010 celis/cm3.The compression strength at 100 °C is strongest among that of the materials at the other temperature.The average compression strength was 24.2 MPa.The compression strength-to-weight ratio of microcellular unsaturated polyester prepared at 90 °C and 100 °Cwas about twice that of unsaturated polyester.