JALPA V. CHOPDA, DHARMESH B. SANKHAVARA, JIGNESH P. PATEL, P. H. PARSANIA*
Journal of Polymer Materials, Vol.38, No.1-2, pp. 35-48, 2021, DOI:10.32381/JPM.2021.38.1-2.4
Abstract Conventional curing study of epoxy resin of (2E, 6E)-bis (4-hydroxybenzylidene)-4-methyl
cyclohexanone (EMBHBC) was conducted at 140 0
/150 0
C by using 4,4’-diaminodiphenylmethane
(DDM),4,4’-diaminodiphenylsulphone (DDS),4-4’-diaminodiphenyl ether (DDE),
p-phenylenediamine (PDA), 1,2,3,6-tetrahydrophthalic anhydride(THPA), maleic anhydride (MAH)
and pyromellitic dianhydride (PMDA). The gel time for DDS, THPA and DDM hardeners are
found considerably longer than those of DDE, PDA, MAH and PMDA systems indicated different
reactivity towards curing of EMBHBC. Sol–gel analysis of cured resins was carried out in DMF
at room temperature. Diamines cured samples showed 76.3-97.5% gel fractions, while anhydrides
cured samples showed 84.6-99.6% gel fractions.… More >
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