| 天然橡胶/顺丁橡胶并用硫化胶的力学破坏机理 |
| Mechanical Fracture Mechanism of NR/BR Blends |
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| DOI： |
| 中文关键词: 天然橡胶 顺丁橡胶 并用硫化胶 力学破坏 拉伸断裂 屈挠龟裂 热氧老化 扫描电子显微镜 |
| 英文关键词: NR/BR blend mechanical fracture tensile rupture flex crack thermal ageing SEM |
| 基金项目:国家自然科学基金 |
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| 中文摘要: |
| 用扫描电子显微镜对天然橡胶/顺丁橡胶并用硫化胶的力学破坏机理进行了研究，结果表明试样拉伸疲劳破坏断面具有拉伸断裂和屈挠龟裂的双重特征。白炭黑和Si69的加入使硫化胶的屈挠疲劳初始裂口形式发生变化。热氧老化使试样的拉伸断裂由韧性向脆性转化。 |
| 英文摘要: |
| The mechanical fracture mechanism of NR/BR blends was studied by SEM. The results showed that the fracture surface of the test piece of tensile fatigue test combined the charateristics of the tensile strength at break with that of the flex crack. The addition of silica and Si69 changed the initial cracking form of the vulcanizate in flexual fatigue test. And the thermal oxidative ageing transformed the fracture of the test piece from toughness to brittleness. |
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