| 微观粒子对橡胶材料疲劳裂纹的影响机理研究 |
| Mechanism of Influence of Microparticles on Fatigue Crack of Rubber Materials |
| 投稿时间：2021-03-24 修订日期：2021-03-24 |
| DOI：10.12136/j.issn.1000-890X.2021.12.0890 |
| 中文关键词: 疲劳裂纹 微观粒子 氧化锌 天然橡胶 耐疲劳性能 微观缺陷 |
| 英文关键词: fatigue crack microparticle zinc oxide NR fatigue crack fatigue resistance micro defects |
| 基金项目:国家自然科学基金资助项目(041302341,11672148) |
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| 中文摘要: |
| 研究普通氧化锌和纳米氧化锌对天然橡胶硫化胶耐疲劳性能的影响。结果表明：普通氧化锌的粒径较大，不
易发生团聚，但其本身颗粒大会导致硫化胶缺陷，而纳米氧化锌粒径较小，比表面积大，活性更好，但用量较大时易在硫
化胶中团聚而形成微观空穴，二者均导致硫化胶在交变应力作用下产生裂纹；纳米氧化锌减量20%替代普通氧化锌，其既
可在硫化胶中分散均匀，又不易形成微观空穴，且活化效果好，硫化胶的物理性能良好，耐疲劳性能优。 |
| 英文摘要: |
| Abstract：The influence of ordinary zinc oxide and nano-zinc oxide on the fatigue resistance of natural
rubber（NR） was studied. The results showed that，ordinary zinc oxide had a larger particle size and usually
did not agglomerate，but the large particles would cause defects in the vulcanizates. Nano-zinc oxide had a
smaller particle size，larger specific surface area and better activity，but it was easy to agglomerate and form
microscopic cavities in the vulcanizate if its dosage was large. Both ordinary zinc oxide and nano-zinc oxide
could cause cracks in the vulcanized rubber under the action of alternating stress. It was found that when
nano-zinc oxide was used to replace the ordinary zinc oxide in the compounds with a reduced amount by
20%，it was uniformly dispersed in the vulcanizates，did not form any microscopic cavity and provided a good
activation effect. As a result，the physical properties of the vulcanizates were good and the fatigue resistance
was excellent. |
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