摘要
采用同步法制备了聚氨酯/环氧树脂互穿聚合物网络(IPN)半硬泡沫。通过压缩和拉伸试验研究了泡沫材料密度对力学性能的影响。研究表明,在所研究的密度范围内,泡沫的压缩模量和屈服强度均与密度成指数关系。泡沫的拉伸模量和断裂强度与密度也存在类似的关系。利用这些方程可以很好地预测泡沫力学性能随密度的变化关系。IPN泡沫兼有较好的韧性和较高的拉伸强度。相同形变下,相同密度IPN半硬泡沫拉伸过程的单位体积吸能大于压缩过程的单位体积吸能。
A series of semirigid interpenetrating polymer networks （IPN） foams, based on polyurethane （PU） and epoxy resin（ER）, with different densities were prepared by a simultaneous polymerization technique. Compression and tension properties of these foams were measured. Over the range of densities examined, the compression moduli and yield stress of these IPN foams could be described by a power- law relationship with respect to density respectively. The tensile moduli and break strength of these foams were also found to exhibit the similar relationships with respect to density of the foams. Therefore, the change of mechanical properties along with the density of the foams could be well predicted using these models. Experimental results reveal that the IPN foams possess both better ductility and higher tensile strength, and the energy absorption in tension test is higher compared with that in compression test at the same strain.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2010年第4期118-123,共6页
Acta Materiae Compositae Sinica
关键词
聚氨酯/环氧树脂互穿聚合物网络
半硬泡沫
力学性能
吸能
polyurethane/epoxy interpenetrating polymer network
semirigid foam
mechanical property
energy absorption
