Feasibility Analysis of Glass⁃fiber⁃reinforced PA66 Composites Used as Insulation Material for High Voltage Switchgear

doi:10.19491/j.issn.1001-9278.2021.09.012

Abstract

Abstract:

PA66/short glass fiber （SGF） composites with different content of SGF were prepared and their physical properties， mechanical properties and insulation properties were investigated and compared with those of the thermosetting epoxy?based insulating materials. The results indicated that the density of PA66/SGF composites increased with an increase in the SGF content， but it is still lower than the standard of thermosetting epoxy?based insulator material. The composites presented an increase in bending strength， tensile strength and impact strength of when the content of SGF is more than 20 %. The comprehensive mechanical performance of the composite can reach the standard of thermosetting epoxy?based insulator material. Moreover， the dielectric strength and arc resistance time of the composites were improved to be better than the standard of thermosetting epoxy?based insulator material. In conclusion， it is feasible to employ the PA66/GF composites as an insulation material for use in HV switchgear. However， an engineering application research is still necessary for the practical application of the PA66/GF composites.

Key words: short?glass?fiber?reinforced nylon 66 composite, thermosetting epoxy resin based insulator material, mechanical property, insulation property, high voltage switchgear

CLC Number:

TQ 323.6

SI Xiaochuang, YUAN Duanpeng, LI Kai, HAO Liucheng, CHEN Rui, ZHANG Nana. Feasibility Analysis of Glass⁃fiber⁃reinforced PA66 Composites Used as Insulation Material for High Voltage Switchgear[J]. China Plastics, 2021, 35(9): 75-80.

Figures/Tables 9

样品编号	PA66含量	SGF含量	主抗氧剂含量	润滑剂含量	其他助剂含量
1^#	100	0	0	0	0
2^#	86.5	10	0.3	0.8	2.4
3^#	76.5	20	0.3	0.8	2.4
4^#	66.5	30	0.3	0.8	2.4
5^#	56.5	40	0.3	0.8	2.4
6^#	46.5	50	0.3	0.8	2.4

Tab.1. Formulation of SGF/PA66 composites

Fig.1. Density of PA66 / SGF composites with different SGF contents

Fig.2. DSC curves of PA66 / SGF composites with different SGF contents

Fig.3. Mechanical properties of PA66/SGF composites with different SGF contents

Fig.4. Dielectric strength of PA66 / SGF composites with different SGF contents

Fig.5. SEM of impact section of PA66/SGF composites with 50% SGF contents

Fig.6. Dielectric constant of PA66/SGF composites with different SGF content

Fig.7. Arc resistance of PA66/SGF composites with different SGF contents

Fig.8. SEM of cross section of PA66/SGF composites with different SGF content

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