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| 天然橡胶的门尼粘度和塑性保持率对全钢载重子午线轮胎胎体胶性能的影响 |
| Effect of Mooney Viscosity and Plasticity Retention Index of NR on Properties of Carcass Compound of Truck and Bus Radial Tire |
| Received:November 17, 2021 Revised:November 17, 2021 |
| DOI：10.12137/j.issn.2095-5448.2023.03.0132 |
| 中文关键词: 天然橡胶 门尼粘度 塑性保持率 全钢载重子午线轮胎 胎体胶 物理性能 生热 |
| 英文关键词: NR Mooney viscosity PIR truck and bus radial tire carcass compound physical property heat build-up |
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| 中文摘要: |
| 研究天然橡胶（NR）的门尼粘度和塑性保持率（PRI）对全钢载重子午线轮胎胎体胶性能的影响。结果表明：NR的门尼粘度和PRI越小，则生胶的重均相对分子质量越大，相对分子质量分布越宽；胶料的门尼粘度减小，门尼焦烧时间延长，硫化速度减慢；硫化胶的拉伸强度和拉断伸长率减小，生热增大，耐热老化性能下降，炭黑分散性变化不大。 |
| 英文摘要: |
| The effect of Mooney viscosity and plastic retention rate（PRI） of natural rubber（NR） on the properties of the carcass compound of truck and bus radial tire was studied.The results showed that the lower the Mooney viscosity and PRI of NR，the greater the weight average relative molecular weight of raw rubber，the wider the distribution of relative molecular weight，the Mooney viscosity of the compound decreased，the Mooney scorch time was prolonged，the curing rate was slowed down，the tensile strength and elongation at break of the vulcanizate decreased，the heat build-up increased，the heat aging resistance decreased，and carbon black dispersion changed little. |
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