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Formaldehyde Resins Bearing Diaminodiphenylmethane Groups: Synthesis, Characterization and Properties

✍ Scribed by Fanica Mustata; Ioan Bicu

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
156 KB
Volume
289
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

Summary: Novel formaldehyde resins bearing diaminodiphenylmethane groups were synthesized by the polymerization of a mixture of diaminodiphenylmethane (DDM), cyclohexanone (CHx) and o‐cresol (o‐Cz) with formaldehyde (FA) in the presence of an acid catalyst (HCl). The resins obtained were characterized by spectral, elemental and thermal analysis and used as a hardener for epoxy resins. The curing and temperature behavior of these epoxy resin/formaldehyde systems were investigated using differential scanning calorimetry and thermogravimetry techniques. The resins had good thermal stability and the activation energies of degradation reactions had values between 70–98 kJ · mol^−1^.

The curing reaction of epoxy resins with the DDM/CHx/o‐Cz/formaldehyde resins.

magnified imageThe curing reaction of epoxy resins with the DDM/CHx/o‐Cz/formaldehyde resins.

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