The phenolic resin(PF)foam was prepared by mirosphere foaming agent with molding method.The raw materials were blended by banbury mixer,the PF material was toughened by polyolefin elastomer(POE),and was modified by the inorganic fillers such as quartz,mica and kaolin.The influence of amount of POE as well as the fillers on the performance of the PF material were investigated.The experimental results showed the amount of POE should be equal to that of PF,and Dicumyl Peroxide(DCP)should be used to crosslink POE.Among the three fillers,kaolin was helpful to improve the elongation at break and decline the density of PF foam.5％quartz rather than 3％was good to decline the density,and increase the mechanical performances of the foam.The recommended formulation was PF 50+POE 50+mica 5/kaolin 5/quartz 5+DCP 0.3+antioxygen 0.1.The foaming processing was as follows:mixing the PF,POE,the filler and antioxygen for 4 min in banbury mixer,then mixing another 1min after adding the foaming agent and DCP.The mixing temperature was 90 ℃.Then the samples was foamed on vulcanizing press at 180 ℃ for 15 min.The average size of the foam cells was 219.7～299.1 μm.The density of the foam was 0.31～0.44 g/cm3,the tensile strength was 1.52～2.05 MPa,the elongation at break was 54％～85％,the Shore hardness was 84～89.
关键词
发泡/密度/拉伸强度/断裂伸长率/酚醛树脂
Key words
foaming/density/tensile strength/elongation at break/phenolic resin
维普
万方数据