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Polymers 2017, 9(5), 170; doi:10.3390/polym9050170

5000 h Multi-Factor Accelerated Aging Test of FRP Made Transmission Tower: Characterization, Thermal Decomposition and Reaction Kinetics Study

1
School of Electrical Engineering, Wuhan University, Wuhan 430072, China
2
School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
3
Tangshan Power Supply Company of State Grid Jibei Electric Power Company, Tangshan 063000, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Wei Min Huang
Received: 20 March 2017 / Revised: 3 May 2017 / Accepted: 6 May 2017 / Published: 10 May 2017
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Abstract

Three kinds of fiber reinforced plastic (FRP) composites, including modified polyurethane resin (LGD), epoxy resin (E44) and modified unsaturated polyester resin (D33) glass-fiber reinforced plastics, were subjected to a 5000 h multi-factor accelerated aging test according to the power industry standard. To examine aging resistance and thermal stability of transmission towers made by these three composites, relevant bending properties, thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG), activation energy, as well as microscopic morphology were revealed. The results showed that for these composites, bending modulus retention rates were higher than 94% under the aging test and that of the LGD was highest. Additionally, the onset degradation temperature, temperature at maximum rate of weight loss and T5% reduced at 5000 h, with D33 having highest value and lowest decline rate. The activation energy was calculated with the Bagchi, Coats-Redfern and Broido method, respectively. Although the activation energy of all composites decreased after test, the D33, LGD materials had the highest activation energy which enjoys slight decline. Analysis of the whole experimental results suggested that D33 and LGD composites have good aging resistance, whose basic performance could still perform well after 5000 h aging test, so they can be used to composite towers and applied to engineering practice. View Full-Text
Keywords: composite transmission tower; multi-factor aging test; aging resistance; mechanical properties; TGA; thermal stability; reaction kinetics; surface morphology composite transmission tower; multi-factor aging test; aging resistance; mechanical properties; TGA; thermal stability; reaction kinetics; surface morphology
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MDPI and ACS Style

Shao, J.; Wang, J.; Long, M.; Li, J.; Ma, Y. 5000 h Multi-Factor Accelerated Aging Test of FRP Made Transmission Tower: Characterization, Thermal Decomposition and Reaction Kinetics Study. Polymers 2017, 9, 170.

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