摘要
分析天然橡胶(NR)/丁苯橡胶(SBR)并用比对胶料撕裂强度(裤形试样)和动态切割性能的影响。结果表明,随着SBR用量增大,试样的撕裂过程由多节撕裂过渡到平稳撕裂,撕裂强度峰值下降,谷值上升。NR为连续相时,胶料易产生长距离撕裂且舌端不容易断裂,动态切割量大;SBR为连续相时,胶料割口扩展速度低且舌端容易断裂,动态切割量小。撕裂强度谷值高的胶料动态切割量小。
The influence of the blending ratio of natural rubber （NR）/styrene-butadiene rubber （SBR） on the trouser tear strength and dynamic cutting resistance of the blends was studied. It was found that with the increase of the amount of SBR, the tear mechanism showed a transition from stick-slip tearing or knotty tearing to steady tearing, the peak value of tear force decreased and the bottom value increased. When the continuous phase was NR, the compound showed long-range tearing characteristic, the crack tip was relatively hard to be broken and the tear energy under dynamic loading was high. On the other hand, when the continuous phase was SBR, the crack growth rate was low, the crack tip was prone to be broken and the tear energy was relatively low. It was also found that the compound having a higher bottom value of tear force usually possessed lower tearing energy under dynamic loading.
出处
《橡胶科技》
2013年第6期22-25,共4页
Rubber Science and Technology
关键词
天然橡胶
丁苯橡胶
并用胶
裤形试样
撕裂性能
动态切割性能
natural rubber
styrene-butadiene rubber
blend
trouser type test piece
tear strength
dynamic cutting resistance
