PVC/CPE/GF复合材料制备及力学性能

Preparation and Mechanical Properties of PVC/CPE/GF Composites

采用玻璃纤维(GF)及氯化聚乙烯(CPE)对聚氯乙烯(PVC)协同增韧改性。研究表明,当共混体系中有一定量的GF时,CPE的加入不仅能够改善共混物的韧性,还能够促进GF在PVC基体中的分散,两者协同增韧。随着CPE加入量的增加,GF分散效果增强,PVC/CPE/GF共混物的硬度呈现先显著增强后缓慢增强的趋势、拉伸强度和断裂伸长率逐渐上升、拉伸弹性模量先升高后下降,增韧效果明显。当经过硅烷偶联剂KH–550处理过的GF的质量一定,CPE用量为配方总质量的15%~20%之间时,通过PVC/CPE/GF共混物样条冲击断面的扫描电子显微镜观察可见,GF在基体中分散均匀,与基体粘结紧密,断面产生了大量有规则的网丝结构,增韧效果最佳。

The synergistic toughening modification of polyvinyl chloride(PVC)can be achieved by using the glass fiber(GF)and chlorinated polyethylene(CPE).The research shows that the addition of CPE into a certain amount of GF in the blend system,which not only improve the toughness of the blend,but also promote the dispersion of GF in the PVC matrix,and then synergistic toughening is occurred.With the content of CPE increase,the dispersion effect of GF is enhanced.The hardness of PVC/CPE/GF blends increase significantly at first and then slowly,the tensile strength and elongation at break increase gradually,Young’s modulus increased at first and then decrease,and the toughening effect is obvious.When the quality of GF treated by silane coupling agent KH–550 is certain,the quality of CPE as the dosage of formula between 15%-20%,PVC/CPE/GF blend spline impact cross section scanning electron microscope observation show that GF disperse uniformly in the matrix,and the matrix bonding tightly,crosssection produce a large number of regular mesh structure,toughening effect is the best.