Results of experiments and SEM observation showed that epoxidized natural rubber (ENR) could improve the dispersion of UFPR in PVC U and enhance the toughness of the blends.

• 实验结果和电镜图像表明:粉末橡胶基本粒子均匀分散的效果是影响共混物冲击韧性高低的重要因素;