Effect of Water on Cellular Structure and Properties of Rigid Polyurethane-imide Foams
AN Man1, CHEN Xing-gang1,2, HOU Gui-xiang1, SANG Xiao-ming1
1. Hebei Province Key Laboratory of Inorganic Nonmetallic Materials,College of Materials Science and Engineering,Hebei United University,Tangshan 063009,Hebei,China;
2. Qinggong College,Hebei United University,Tangshan 063000,Hebei,China
Abstract:PI prepolymerization method was adopted to synthesize rigid polyurethane-imide foams. The effect of content of water on the density, surface chalking degree and mechanical properties was analyzed. The relationship between the mechanical property and density was established following the power law. In addition, the cellular structure was observed using stereomicroscope and polarizing microscope. The results showed that,with the increased content of water, the density, compressive strength,compressive modulus, impact strength and cell edge thickness of rigid polyurethane-imide foams decreased,and average cell diameter and surface chalking degree of foams increased. The density exponent value was calculated as 1.78, 1.55 and 0.72 for compressive strength, compressive modulus and impact strength, respectively, for polyurethane-imide foams.
安曼, 陈兴刚, 侯桂香, 桑晓明. 水对硬质聚氨酯-酰亚胺泡沫泡孔结构与性能的影响[J]. 材料工程, 2013, 0(4): 39-44.
AN Man, CHEN Xing-gang, HOU Gui-xiang, SANG Xiao-ming. Effect of Water on Cellular Structure and Properties of Rigid Polyurethane-imide Foams. Journal of Materials Engineering, 2013, 0(4): 39-44.
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