A thermally remendable epoxy resin

To provide epoxy resin with crack healing capability, an epoxy containing both furan and epoxide groups, N,N'-diglycidyl-furfurylarmine (DGFA), was synthesized through a two-step approach. When it reacted with N,N'-(4,4'-diphenylmethane) bismaleimide (DPMBMI) and methylhexahydrophthal...

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Bibliographic Details
Published in:Journal of materials chemistry 2009-03, Vol.19 (9), p.1289-1296
Main Authors: Tian, Qiao, Yuan, Yan Chao, Rong, Min Zhi, Zhang, Ming Qiu
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
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Summary:To provide epoxy resin with crack healing capability, an epoxy containing both furan and epoxide groups, N,N'-diglycidyl-furfurylarmine (DGFA), was synthesized through a two-step approach. When it reacted with N,N'-(4,4'-diphenylmethane) bismaleimide (DPMBMI) and methylhexahydrophthalic anhydride (MHHPA), respectively, a crosslinked polymer with two types of intermonomer linkage was yielded. That is, thermally reversible Diels-Alder (DA) bonds from the reaction between furan and maleimide groups, and thermally stable bonds from the reaction between epoxide and anhydride groups. In this way, cured DGFA possessed not only similar mechanical properties as commercial epoxy, but also thermal remendability that enabled elimination of cracks. The latter function took effect as a result of successive retro-DA and DA reactions, which led to crack healing in a controlled manner through chain reconnection.
ISSN:0959-9428
1364-5501
DOI:10.1039/b811938d