| 硬脂酸镧对LLDPE热老化行为的影响 |
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| 引用本文： | 李红山,张艺,许家瑞.硬脂酸镧对LLDPE热老化行为的影响[J].中山大学学报(自然科学版),2006,45(6):48-52. |
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| 作者姓名： | 李红山 张艺 许家瑞 |
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| 作者单位： | 1. 中山大学化学与化学工程学院//聚合物复合材料及功能材料教育部重点实验室,广东,广州,510275;嘉应学院化学系,广东,梅州,514015
2. 中山大学化学与化学工程学院//聚合物复合材料及功能材料教育部重点实验室,广东,广州,510275 |
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| 基金项目： | 国家自然科学基金;中山大学校科研和教改项目 |
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| 摘 要： | 通过力学性能测试以及DSC、广角X-射线衍射和FTIR等手段，对添加了硬脂酸镧和抗氧剂1010的LLDPE进行比较，研究了硬脂酸镧对LLDPE热老化行为的影响。LLDPE的结晶度随热老化时间增加而进高，相对于含抗氧剂1010的体系，不含抗氧剂1010体系的结晶度提高幅度较大。硬脂酸镧虽可提高LLDPE在热氧分解高温阶段的稳定性，但并未改变LLDPE的热老化机理，在不含抗氧剂1010的纯LLDPE和硬脂酸镧填充的LLDPE体系，LLDPE在热老化过程中出现了相同的断链、支化和氧化反应，从而导致LLDPE力学性能下降。
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| 关 键 词： | 硬脂酸镧 热老化 |
| 文章编号： | 0529-6579(2006)05-0048-05 |
| 收稿时间： | 01 5 2006 12:00AM |
| 修稿时间： | 2006年1月5日 |
Effect of Lanthanum Stearate on Thermal Aging Behavior of LLDPE |
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| LI Hong-shan,ZHANG Yi,XU Jia-rui.Effect of Lanthanum Stearate on Thermal Aging Behavior of LLDPE[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2006,45(6):48-52. |
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| Authors: | LI Hong-shan ZHANG Yi XU Jia-rui |
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| Institution: | 1. Key Laboratory for Polymeric Composite and Functional Materials of the Ministry of Education// School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China; 2. Department of Chemistry, Jiaying University, Meizhou 514015, China |
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| Abstract: | The effects of lanthanum stearate on the thermal aging behaviors of LLDPE were studied by comparing the influence of lanthanum stearate and antioxidant 1010 through mechanical tests, DSC, WAXD and FHR analysis. The crystallinity of LLDPE increased with thermal aging, and the increase of crystallinity in the systems without antioxidant 1010 was larger than those with antioxidant 1010. The thermal aging mechanism did not change by adding lanthanum stearate. Chain cleavage, branching and oxidation occurred both in the pure LLDPE and LLDPE with lanthanum stearate as additive in the absence of antioxidant 1010, so that the mechanical properties decreased with aging. |
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| Keywords: | LLDPE |
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