STUDY ON DIELECTRIC PROPERTIES OF QUARTZ FIBER REINFORCED5284RTM EPOXY RESIN COMPOSITES

Abstract

Abstract: Quartz fiber reinforced epoxy resin QW220/5284RTM composite laminates with four different fiber volume fractions were fabricated via RTM process. The relationship between dielectric properties of the composites and temperature, moisture absorption, frequency, fiber volume fraction of composites and post cure were investigated. The results showed that within the temperature range of 30 to 150℃, dielectric constant and dielectric loss of QW220/5284RTM composites increased with increasing temperature. When fiber volume fraction of the composite was 53%, saturated moisture absorption rate of the composite was about 0.44%, and dielectric constant and dielectric loss of the composites increased after moisture absorption. At room temperature, dielectric constant and dielectric loss of the composites did not show any obvious and regular changes with frequency changing from 7 to 18 GHz. Dielectric constant and dielectric loss of the composites respectively increased and decreased with increasing fiber content. Dielectric constant and dielectric loss of the composites decreased after post curing. QW220/5284RTM composite has good dielectric properties which has good environmental characteristics, and can be used for aircraft wave-transparent structure.

Key words: composites, quartz fiber, epoxy resin, dielectric properties, RTM, aircraft wave-transparent structure

CLC Number:

TB332

HE Xian-cheng, ZHONG Xiang-yu, LI Ye, BAO Jian-wen. STUDY ON DIELECTRIC PROPERTIES OF QUARTZ FIBER REINFORCED5284RTM EPOXY RESIN COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2016, 0(4): 45-50.

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