| 有机粘土/天然胶乳纳米复合材料的循环拉伸诱导结晶行为研究 |
| Tensile-included Crystallization Behavior of OC/NRL Nanocomposites by Cyclic Stretching |
| 投稿时间：2020-08-06 修订日期：2020-08-06 |
| DOI：10.12136/j.issn.1000-890X.2020.12.0904 |
| 中文关键词: 有机粘土 天然胶乳 纳米复合材料 乳液插层法 循环拉伸 拉伸诱导结晶 |
| 英文关键词: organic clay NRL nanocomposites emulsion intercalation method cyclic stretching tensile-induced crystallization |
| 基金项目:国家自然科学基金资助项目(51573124) |
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| 中文摘要: |
| 采用乳液插层法制备有机粘土（OC）/天然胶乳（NRL）纳米复合材料（NRLCNs），研究OC用量和循环拉伸对NRLCNs拉伸诱导结晶行为的影响。结果表明：NRLCNs为插层结构，随着OC用量的增大，NRLCNs的拉伸强度先增大后减小，当OC用量为4份时，NRLCNs的力学性能达到最佳，拉伸强度为15.86 MPa，较天然橡胶胶料（未加OC）的拉伸强度提高58%；OC的加入有助于NRLCNs发生拉伸诱导结晶，随着其用量的增大，NRLCNs的拉伸结晶临界诱变点的拉伸应变减小；经过循环拉伸处理的NRLCNs橡胶分子产生了一定的取向，再次拉伸时能够更快地达到拉伸结晶临界诱变点，产生拉伸诱导结晶。 |
| 英文摘要: |
| Organic clay（OC）/natural rubber latex（NRL） nanocomposites（NRLCNs） were prepared by emulsion intercalation method，and the effects of the addition level of OC and cyclic stretching on the tensile-induced crystallization behavior of NRLCNs were studied. The results showed that NRLCNs had an intercalation structure. With the increase of the addition level of OC，the tensile strength of NRLCNs first increased and then decreased. When the addition level of OC was 4 phr，the mechanical properties of NRLCNs reached the best，with a tensile strength of 15. 86 MPa，which was higher than that of natural rubber compound（without CO） by 58%. Meanwhile，the addition of OC helped NRLCNs to undergo tensile-induced crystallization，and as its addition level increased，the tensile strain at the critical mutation point of tensile crystallization of NRLCNs decreased. At the same time，after the cyclic stretching treatment，the rubber molecules of NRLCNs had a certain orientation，and when they were stretched again，they could reach the critical mutation point faster，resulting in tensile-induced crystallization. |
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