【摘要】 通过改变发泡剂用量和采用不同密度泡沫组合 ,来改变聚氨酯结构泡沫整体的密度分布 ,研究了梯度密度聚氨酯泡沫塑料的性能。结果表明 ,当发泡剂质量分数约为聚醚的 10 %时 ,所形成的梯度密度聚氨酯泡沫塑料的冲击强度和弯曲强度达到最大值 ;采用夹芯结构可以有效改善材料的抗冲击性能。更多还原

【Abstract】 By changing the contents of blowing agent and the inner size and changing the density distribution of structural polyurethane foam, the influences of the inner structure on the properties of gradient density polyurethane foam were investigated. The results show that the impact and flexural strengthes of this materials reach a maximum when the content of blowing foam is 10% and the inner structure can improve the impact strength obviously.更多还原