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Analysis of atomic oxygen and ultraviolet exposure effects on cycloaliphatic epoxy resins reinforced with octa-functional POSS

Suliga, Agnieszka, Jakubczyk, Ewa, Hamerton, I and Viquerat, Andrew (2017) Analysis of atomic oxygen and ultraviolet exposure effects on cycloaliphatic epoxy resins reinforced with octa-functional POSS Acta Astronautica, 142. pp. 103-111.

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In this study, novel nanocomposites were created by incorporation of Silsesquioxane containing eight glycidylether groups (octa-POSS) into a cycloaliphatic epoxy cured by an anhydride. The developed resin system, with different nanoparticle concentrations, was used on the outer layers of an ultra-thin CFRP structure in order to provide better environmental resistance to the environment of low Earth orbit (LEO) which was tested in a ground-simulation facility. The developed resins were subjected to space-like degrading factors and their response to corrosion, radiation and elevated temperatures was monitored by mass loss, together with measuring changes in surface chemistry (ATR-FTIR), functionality development (contact angle measurement and XPS), roughness (scanning laser microscopy) and morphology (SEM). The influence of increasing octa-POSS content on thermo-mechanical properties was measured with DMTA and the strength and modulus of elasticity were determined by flexural test. The addition of octa-POSS in any loading improves the environmental resistance, however, the most significant retention of mass and mechanical and surface properties after space-like exposure was observed in the 20 wt% octa-POSS reinforced cycloaliphatic epoxy. The results presented here may contribute to the development of novel class of nanocomposites which can offer an extended service life in LEO.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Date : 25 October 2017
Funders : Engineering and Physical Sciences Research Council (EPSRC)
Identification Number : 10.1016/j.actaastro.2017.10.018
Grant Title : Industrial CASE EP/L505675/1
Copyright Disclaimer : © 2017 IAA. Published by Elsevier Ltd. All rights reserved.
Uncontrolled Keywords : Atomic oxygen; Cycloaliphatic epoxy resin; POSS; Space materials; UV radiation
Depositing User : Jane Hindle
Date Deposited : 17 Oct 2017 15:18
Last Modified : 13 Nov 2017 14:43

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