Elongation At Break Decreased

The hardness gradually increased, while the tensile strength and elongation at break decreased gradually. With the elongation of time, these change gradually flattened.

硬度增大，而拉伸强度和扯断伸长率则逐渐降低，随老化时间延长，变化趋势逐渐平缓。

With the increase of elastomer content, the tensile strength and elastic modulus of the blends decreased, while the elongation at break increased.

随着共混物中弹性体质量分数的增加，共混物的拉伸强度和弹性模量降低，扯断伸长率增大。

The results showed that the sample by adding the ultrafine powders of silica aerogel increased the tensile strength 54%, the elongation at break 64%, decreased the abrasion loss 20%.

试验结果表明，加入湿法白炭黑超细粉的试样拉伸强度比添加气相法白炭黑者提高了54%，扯断伸长率提高了64%，磨耗量降低了20%。