聚丙烯/木粉发泡材料的准静态压缩特性

Quasi Static Compression Characteristic of PP/Wood Flour Foams

以偶氮二甲酰胺(AC)为发泡剂,过氧化二异丙苯(DCP)为交联剂,采用模压法制备聚丙烯/木粉发泡材料,并对不同木粉含量的发泡材料的准静态压缩特性进行了研究。结果表明,木粉加入后发泡材料的准静态压缩杨氏模量、屈服强度都有不同程度的下降,而添加了木粉的试样随着木粉量的增加,均呈现先增后降的变化规律,在添加量为30份时达到最大值;另外,随着压缩速率提高,发泡材料的杨氏模量、屈服强度及密实化起始应变均随之增加。

The foamed PP/wood flour was prepared by compression molding foaming using dicumyl peroxide （DCP） as the crosslinking agent and azodicarbonamide（AC） as the blowing agent. The effect of wood flour content on quasi static compression characteristic of foams was investigated. The results show that the Young＇s modulus and yield strength of foams decrease after the addition of the wood flour. And with the increase of the content of wood flour, they all increase first and then decrease, reach a maximum at 30phr. In addition, the Young＇s modulus, yield strength of the foams and the starting strain of densification stage all increase with the compression rate increasing.