紫外线辐照对聚丙烯化学组成及复合材料界面的影响

EFFECT OF ULTRAVIOLET IRRADIATION ON CHEMICAL CONSTRUCTION OF PP AND INTERFACIAL PROPERTIES OF GF/PP COMPOSITES

研究了经紫外线辐照的聚丙烯（ＰＰ）的化学组成，表征了以辐照ＰＰ作为界面相容剂的玻纤／ＰＰ复合材料的界面结合强度和界面粘结状态．结果表明， 紫外线辐照可在ＰＰ分子链上引入ＣＯＣ、ＣＯＨ、Ｃ＝ Ｏ、ＣＯＯＨ 等含氧基团； 辐照ＰＰ作为界面相容剂， 能改善ＰＰ与玻纤间界面粘结状况，明显提高复合材料的层间剪切强度．

Polypropylene(PP) was treated by ultraviolet irradiation, the chemical construction of irradiated PP was studied by XPS. The interlaminar shear strengths (ILSS) of glass fiber reinforced PP (GF/PP) with 5% (mass fraction) irradiated PP were measured by short beam shear test and interfacial adhesion of GF/PP was observed by SEM. The results showed that ultraviolet irradiation introduces oxygen functional groups (C O C、C OH、C=O、COOH)to PP molecular chain and irradiated PP, as interfacial compatilizer, can improve interfacial adhesion of GF/PP, increase the interlaminar shear strengths of GF/PP composites.