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
Technology
Physical Sciences
Materials Science, Multidisciplinary
Polymer Science
Materials Science
epoxy
macroporous polymers
mechanical properties
toughness and impact resistance
SYNTACTIC FOAM
FLEXURAL STRENGTH
RUBBER
DEFORMATION
MORPHOLOGY
POROSITY
03 Chemical Sciences
09 Engineering
Polymers
Publication Status: Published
Embargo Date: 2019-09-24
Article Number: 1800363
Online Publication Date: 2018-09-24
Appears in Collections:Faculty of Engineering
Aeronautics



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