Thermal and electrical behaviour of radiation vulcanized EPDM/Al2O3 composites

被引：22

作者：

Abdel-Aziz, MM ^{[1
]}

Gwaily, SE ^{[1
]}

Madani, M ^{[1
]}

机构：

[1] AEA, Natl Ctr Radiat Res & Technol, Cairo, Egypt

来源：

POLYMER DEGRADATION AND STABILITY | 1998年 / 62卷 / 03期

关键词：

D O I：

10.1016/S0141-3910(98)00045-7

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Thermal degradation as well as the thermal and electrical properties has been explored for gamma-radiation-vulcanized EPDM rubber/Al2O3 composites. Various particle size namely, 0.02, 0.3 and 1.0 mu m of 40 phr of Al2O3, were considered. The effect of adding EGDM as radiation sensitizer to the system has been also investigated. Thermogravimetry (TG) and derivative thermogravirnetry (DTG) have been applied to study the thermal degradation at temperatures ranging from 25 to 800 degrees C. The effect of temperature in the range of 25-150 degrees C on the thermal and electrical properties of these composites has been also studied. The addition of Al2O3 leads to increase in the values of thermal diffusivity coefficient and the dielectric constant and decrease in the values of the specific heat for composites in the presence or the absence of the radiation sensitizer. The thermal and electrical properties of the composites depend on the particle size of the incorporated filler beside the irradiation dose of vulcanization. Moreover, these properties are slightly changed with temperature. The addition of EGDM decreased the dielectric constant of EGDM containing Al2O3 fillers. Degradation is predominant for all samples at radiation doses greater than or equal to 150 kGy. (C) 1998 Elsevier Science Limited. All rights reserved.

引用

页码：587 / 597

页数：11

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