PVA/PS共混改性及对拉伸性能的影响

PVA / PS Blend Modification and the Affect of Tensile Properties

对不同配比的聚乙烯醇/聚苯乙烯(PVA/PS)共混物进行共混改性研究。使用拉力试验机测试了PVA/PS共混物的拉伸强度,使用扫描电镜(SEM)分析试样的断口,并分析共混物的分散性及相容性。实验结果表明:PVA含量在10%以内对共混物的拉伸强度影响不大,主要表现为PS的拉伸强度;而PVA含量在10%￣50%的范围内,拉伸强度明显下降,在50%时达到最小值。

The blending modification of polyvinyl alcohol / polystyrene with different blending ratio was studied. The tensile strength of the PVA/PS blends was tested, and the sample fracture was analyzed with the scanning electron microscopy （SEM）, and also the dispersion and compatibility of blends were investigated. The results show that the content of PVA in 10 percent has little effect on the tensile strength of the blends, and when the content of PVA is within the scope of 10 to 50 percent, the tensile strength decreases significantly, in achieve the minimum 50%.