RELATIONSHIPS BETWEEN THERMO-OXIDATION AND DYNAMIC RHEOLOGICAL BEHAVIOR OF EPDM

CAO Yanxia; ZHENG Qiang; DU Miao

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RELATIONSHIPS BETWEEN THERMO-OXIDATION AND DYNAMIC RHEOLOGICAL BEHAVIOR OF EPDM

Research Article | 更新时间：2021-03-19

- RELATIONSHIPS BETWEEN THERMO-OXIDATION AND DYNAMIC RHEOLOGICAL BEHAVIOR OF EPDM
- Acta Polymerica Sinica Issue 3, Pages: 408-412(2005)
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- Published：20 June 2005，
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CAO Yanxia, ZHENG Qiang, DU Miao. RELATIONSHIPS BETWEEN THERMO-OXIDATION AND DYNAMIC RHEOLOGICAL BEHAVIOR OF EPDM. [J]. Acta Polymerica Sinica (3):408-412(2005)
DOI：

CAO Yanxia, ZHENG Qiang, DU Miao. RELATIONSHIPS BETWEEN THERMO-OXIDATION AND DYNAMIC RHEOLOGICAL BEHAVIOR OF EPDM. [J]. Acta Polymerica Sinica (3):408-412(2005) DOI：

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

200～220℃可明显观察到受热氧化导致EPDM结构的生成.

Abstract

The study on the dynamic rheologieal behavior at molten state for ethylene-propylene-diene terpolymer (EPDM) was conducted with an advanced rheometrie expansion system (ARES)．It was found that dynamic rheological functions such as dynamic storage modulus(G’)

dynamic loss modulus(G″) and dynamic loss tangent (tanδ) at low frequency region can sensitively reflect the change of structure of EPDM．On the basis of the difference of dynamic rheologieal properties between virgin and antioxidant-added EPDM

the characteristic rheologieal behavior of EPDM subjected to annealing was attributed to the thermo-oxidation of EPDM at molten state．The results measured by rheologlcal tests revealed that within the temperature region from 200℃ to 220℃ the thermo-oxidation of EPDM could be detected distinctly．

关键词

EPDM热处理氧化动态流变行为

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