The role of β relaxations in determining the compressive properties of an epoxy amine network modified with POSS and mono-functional epoxy resins

Larry Q. Reyes; Samuel R. Swan; Houlei Gan; Seyed Mohsen Seraji; Jane Zhang; Russell J. Varley

Polymer Testing (Jan 2021)

The role of β relaxations in determining the compressive properties of an epoxy amine network modified with POSS and mono-functional epoxy resins

Larry Q. Reyes,
Samuel R. Swan,
Houlei Gan,
Seyed Mohsen Seraji,
Jane Zhang,
Russell J. Varley

Affiliations

Larry Q. Reyes: Carbon Nexus at the Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, 3216, Australia
Samuel R. Swan: Carbon Nexus at the Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, 3216, Australia
Houlei Gan: Carbon Nexus at the Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, 3216, Australia
Seyed Mohsen Seraji: Carbon Nexus at the Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, 3216, Australia
Jane Zhang: Carbon Nexus at the Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, 3216, Australia
Russell J. Varley: Corresponding author.; Carbon Nexus at the Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, 3216, Australia

Journal volume & issue: Vol. 93
p. 106873

Abstract

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Presented here is an investigation into the glassy state molecular mobility of modified epoxy amine networks using sub-ambient β relaxations measured from dynamic mechanical relaxations and their relationship to compressive properties. Two classes of additives are used to modify the epoxy amine network, the first are bulky inorganic siloxane caged epoxy functional polysilsesquioxanes (POSS) and the second are mono-functional epoxy diluents. Different pre-reaction methods between the POSS and amine were used to maximise dispersion or improved covalent attachment within the epoxy amine network while the mono-functional epoxy diluents easily react into the network via simple blending. Despite the wide structural variations in modifier and result effects upon final structure, microstructure and properties, the glassy state molecular mobility as measured by sub-ambient β relaxations correlates strongly with changes in modulus and yield strain.

Published in Polymer Testing

ISSN: 0142-9418 (Print); 1873-2348 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Chemical technology: Polymers and polymer manufacture
Website: https://www.journals.elsevier.com/polymer-testing

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