Electro-Optical and Electrochemical Properties of Diglycidyl Ether of 4,4′-(9-Fluorenylidene)diphenol

Gal, Yeong‐Soon; Suh, Han-Na; Lee, Won‐Chul; Jin, Sung‐Ho; Park, Young-Il; Park, Jong‐Wook; Lyoo, Won Seok; Lim, Kwon Taek

doi:10.1080/15421400802619065

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“…In general, glycidyl ether epoxy resins can be shynthesized from the condensation reaction of epichlorohydrin and phenol (or alcohol) containing active hydrogen, using two approaches [29][30][31][32]. We synthesized diglycidyl ether monomers (DE) by the cycloaddition DA reaction of 2-furfuryl glycidyl ether to urethane bismaleimides (BMI) (Scheme 1).…”

Section: Resultsmentioning

confidence: 99%

Novel Thermally-Reversible Epoxy-Urethane Networks

Gaina¹,

Ursache

Găină

et al. 2012

Designed Monomers and Polymers

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Thermally-reversible epoxy-urethane networks are prepared by the reaction of diamines and diepoxy monomers containing two Diels-Alder adducts. The diepoxy compounds are formed via a Diels-Alder reaction between two epoxy-containing furans and bismaleimides having urethane moieties. The urethanebismaleimides were obtained by the reaction of 4-maleimidophenylisocyanate with poly(tetrahydrofuran) diols with M n = 650, 1000 and 1450. The epoxy-urethane networks display two glass transition temperatures in the range of −70 and −50 • C for the soft segment and 81-84 • C for the hard segment. At temperatures exceeding 116 • C the retro Diels-Alder reaction occurs, which leads to a significant loss in modulus.

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Section: Resultsmentioning

confidence: 99%