Enhancing the fracture resistance and impact toughness of mechanically frothed epoxy foams with hollow elastomeric microspheres

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Title: Enhancing the fracture resistance and impact toughness of mechanically frothed epoxy foams with hollow elastomeric microspheres
Authors: Song, W
Tagarielli, VL
Lee, KY
Item Type: Journal Article
Abstract: Nonporous elastomeric particles are often employed to improve the toughness of brittle epoxy foams but this also decreases their compressive strength and stiffness. Herein, a novel strategy utilizing hollow elastomeric microspheres as toughening agent for epoxy foams is presented. The addition of 0.5 wt.% hollow elastomeric microspheres into epoxy foam leads to a 15% increase in critical stress intensity factor (K1c) to 0.38 MPa m0.5and 33% increase in Charpy impact strength (acU) to 1.05 kJ m−2, respectively, compared to unfilled epoxy foam (K1c = 0.33 MPa m0.5and acU= 0.79 kJ m−2). However, a further increase in the hollow elastomeric microsphere concentration to 1.0 wt.% leads to microsphere agglomeration, which reduces both K1cand acUto 0.35 MPa m0.5and 0.93 kJ m−2, respectively. Nevertheless, the added hollow elastomeric microspheres do not lead to a reduction in the quasi-static compressive properties of the epoxy foams.
Issue Date: 1-Dec-2018
Date of Acceptance: 14-Aug-2018
URI: http://hdl.handle.net/10044/1/64306
DOI: https://dx.doi.org/10.1002/mame.201800363
ISSN: 1438-7492
Publisher: Wiley
Journal / Book Title: Macromolecular Materials and Engineering
Volume: 303
Copyright Statement: © 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the following article: W. Song, V. L. Tagarielli, K.‐Y. Lee, Macromol. Mater. Eng. 2018, 1800363., which has been published in final form at https://dx.doi.org/10.1002/mame.201800363
Keywords: Science & Technology
Physical Sciences
Materials Science, Multidisciplinary
Polymer Science
Materials Science
macroporous polymers
mechanical properties
toughness and impact resistance
03 Chemical Sciences
09 Engineering
Publication Status: Published
Embargo Date: 2019-09-24
Article Number: 1800363
Online Publication Date: 2018-09-24
Appears in Collections:Faculty of Engineering

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