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Epoxy resin toughened with acrylate‐based liquid rubbers

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Randomized carboxyl poly(2‐ethylhexyl acrylate) (A‐1) and randomized epoxy poly(2‐ethylhexyl acrylate) (B‐1) rubbers were synthesized in the form of liquid rubber by a solution polymerization technique. The liquid rubbers A‐1 and B‐1 were characterized by 1H NMR and IR spectroscopic analysis, non‐aqueous titration, viscosity measurements and gel permeation chromatography. The liquid rubbers A‐1 ( n = 3900 g mol−1), B‐1 ( n = 4100 g mol−1) and a (1:1) mixture of A‐1 and B‐1 were pre‐reacted with epoxy resin separately and the modified epoxy networks were made by curing with high temperature curing agent. The modified epoxy networks were evaluated by unnotched Izod impact testing. The morphology and toughening behaviour were analysed by scanning electron microscopy. Optimum properties were obtained with the mixture of A‐1 and B‐1. Copyright © 2003 Society of Chemical Industry
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Keywords: 2‐ethylhexyl acrylate; epoxy; impact; scanning electron microscopy; toughening

Document Type: Research Article

Affiliations: 1: Materials Science Centre, Indian Institute of Technology, Kharagpur-721302, India 2: Naval Materials Research Laboratory, Addl Ambernath, Thane 421506, India

Publication date: August 1, 2003

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