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. 2018 May 31;11(6):932. doi: 10.3390/ma11060932

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Micrographs of the fracture surface of the stretched modified epoxy resin with different w(EHTPB)/w(EP) ratios after tensile testing: (a) w(EHTPB):w(EP) = 0:100; (b) w(EHTPB):w(EP) = 5:95; (c) w(EHTPB):w(EP) = 10:90; (d) w(EHTPB):w(EP) = 15:85; and (e) w(EHTPB):w(EP) = 20:80.