水对硬质聚氨酯-酰亚胺泡沫泡孔结构与性能的影响  

Effect of Water on Cellular Structure and Properties of Rigid Polyurethane-imide Foams

作　　者：安曼[1] 陈兴刚[1,2] 侯桂香[1] 桑晓明[1] 

机构地区：[1]河北联合大学材料科学与工程学院河北省无机非金属材料重点实验室,河北唐山063009 [2]河北联合大学轻工学院,河北唐山063000

出　　处：《材料工程》2013年第4期39-44,共6页Journal of Materials Engineering

基　　金：河北省科技支撑计划项目资助(11215121D);河北省高等学校科学技术研究重点项目资助(ZH2012014)

摘　　要：采用PI预聚体法合成硬质聚氨酯-酰亚胺泡沫塑料,分析了发泡剂水对泡沫塑料密度、表面粉化程度以及力学性能的影响。运用幂次法则建立了力学性能与密度之间的关系,并利用体视显微镜和偏光显微镜对泡沫塑料的泡孔结构进行了研究。结果表明,硬质聚氨酯-酰亚胺泡沫塑料的密度、抗压强度与压缩模量、冲击强度以及泡孔棱厚随水用量的增加逐渐减小;孔径和表面粉化程度随水用量的增加而逐渐增大;密度与抗压强度、压缩模量、冲击强度之间的密度指数分别为1.78,1.55和0.72。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 ana- lyzed. 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 mi- croscope. 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 densi- ty exponent value was calculated as 1.78, 1.55 and 0.72 for compressive strength, compressive modu- lus and impact strength, respectively, for polyurethane-imide foams.

关 键 词：聚氨酯-酰亚胺 水 幂次法则 泡孔结构 性能 

分 类 号：TQ328.2[化学工程—合成树脂塑料工业]