| EPDM受热氧化与动态流变行为 |
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| 引用本文： | 曹艳霞,郑强,杜淼.EPDM受热氧化与动态流变行为[J].高分子学报,2005(3):408-412. |
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| 作者姓名： | 曹艳霞 郑强 杜淼 |
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| 作者单位： | 浙江大学高分子科学与工程学系,杭州,310027 |
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| 基金项目： | 国家杰出青年科学基金 (基金号 5 0 12 5 3 12 )，国家重大基础研究计划“973”(项目号G19990 64 80 0 )资助项目 |
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| 摘 要： | 采用动态流变学方法研究了三元乙丙橡胶(EPDM)高温氧化与动态粘弹响应之间的关系.在熔体状态下,EPDM的动态粘弹行为随温度升高而改变,呈现出非均相结构的流变响应特征;加入复合抗氧剂后,EPDM在一定的时间范围内,呈现均相体系的流变响应特征.这些结果表明,流变响应特征的改变与受热导致EPDM熔体氧化进而引起结构的改变密切相关.低频区域粘弹函数对EPDM结构变化具有敏感响应,2 0 0～2 2 0℃可明显观察到受热氧化导致EPDM结构的生成.
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| 关 键 词： | EPDM 热处理 氧化 动态流变行为 |
| 修稿时间： | 2004年3月5日 |
RELATIONSHIPS BETWEEN THERMO-OXIDATION AND DYNAMIC RHEOLOGICAL BEHAVIOR OF EPDM |
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| CAO Yanxia,ZHENG Qiang,DU Miao.RELATIONSHIPS BETWEEN THERMO-OXIDATION AND DYNAMIC RHEOLOGICAL BEHAVIOR OF EPDM[J].Acta Polymerica Sinica,2005(3):408-412. |
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| Authors: | CAO Yanxia ZHENG Qiang DU Miao |
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| Abstract: | The study on the dynamic rheological behavior at molten state for ethyl ene-propylene-diene terpolymer (EPDM) was conducted with an advanced rheomet ric expansion system (ARES).It was found that dynamic rheological functions such as dynamic storage modulus (G′),dynamic loss modulus (G″) and dynami c loss tangent (tanδ) at low frequency region can sensitively reflect the change o f structure of EPDM.On the basis of the difference of dynamic rheological prope rties between virgin and antioxidant-added EPDM,the characteristic rheological behavior of EPDM subjected to annealing was attributed to the thermo-oxidation of EPDM at molten state.The results measured by rheological tests revealed that wi thin the temperature region from 200℃ to 220℃ the thermo-oxidation of EPDM c ould be detected distinctly. |
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| Keywords: | Ethylene-propylene-diene terpolymer (EPDM) Annealing Oxidation Dynamic rheological behavior |
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