EFFECTIVE THERMAL CONDUCTIVITY AND COEFFICIENT OF LINEAR THERMAL EXPANSION OF HDPE/FLY ASH COMPOSITES.
As the disposal of fly ash (FA) poses a serious problem in terms of land use and potential environmental pollution, there exists a global interest for its utilization. Utilization of fly ash as filler material in polymer composites is considered important from both economic and commercial point of view. In this communication, the effective thermal conductivity and coefficient of thermal expansion (CTE) of composites synthesized with fly ash filler embedded in high-density polyethylene (HDPE) matrix is investigated. Incorporation of fly ash in HDPE enhances both the thermal stability and the effective thermal conductivity of the composites. CTE, however, significantly decreases as the FA content increases in HDPE. Effective thermal conductivity for HDPE containing 70-volume fraction (％) fly ash becomes almost twice than that for unfilled HDPE. Results on both the effective thermal conductivity and CTE of HDPE/FA composites have been discussed in light of various theoretical models. Our analysis indicates formation of conductive channels of FA particulates in HDPE, which causes rapid enhancement in the effective thermal conductivity of the HDPE/FA composites. We also confirm the importance of the role of the interphase volume and the strength of the polymer -filler interactions to successfully predict the CTE of HDPE/FA composites.
Madhusree Kole Sanjib Baglari T. K. Dey
Thermophysical Measurements Laboratory Cryogenic Engineering Centre Indian Institute of Technology, Kharagpur 721302 (India)
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
194-199
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）