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

doi:10.1016/j.polymertesting.2020.106873

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

Deakin University

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

26 Downloads (Pure)

Abstract

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.

Original language	English
Article number	106873
Number of pages	10
Journal	Polymer Testing
Volume	93
Early online date	28 Sept 2020
DOIs	https://doi.org/10.1016/j.polymertesting.2020.106873
Publication status	Published - Jan 2021
Externally published	Yes

Bibliographical note

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Funder

Funding Information:
Prof Russell J. Varley gratefully acknowledges support from The Australian Research Council ( DP180100094 ) and the ARC Future Fibre Hub ( IH140100018 ) for partial funding of this work.

Keywords

Beta relaxations
Compression
Epoxy/amine networks
Mono functional epoxy diluents
POSS

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

Access to Document

10.1016/j.polymertesting.2020.106873Licence: CC BY-NC-ND

1-s2.0-S0142941820321024-mainFinal published version, 3.89 MBLicence: CC BY-NC-ND

Cite this

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

abstract = "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.",

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AU - Reyes, Larry Q.

AU - Swan, Samuel R.

AU - Gan, Houlei

AU - Seraji, Seyed Mohsen

AU - Zhang, Jane

AU - Varley, Russell J.

N1 - This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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N2 - 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.

AB - 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.

KW - Beta relaxations

KW - Compression

KW - Epoxy/amine networks

KW - Mono functional epoxy diluents

KW - POSS

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

Abstract

Bibliographical note

Funder

Keywords

ASJC Scopus subject areas

Access to Document

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