Characterization of diaminodiphenyl sulfone (DDS) cured tetraglycidyl 4, 4'diaminodiphenyl methane (TGDDM) epoxies

Conference · Wed Jul 14 04:00:00 EDT 1982

OSTI ID:5088272

Mones, E T; Walkup, C M; Happe, J A; Morgan, R J

DDS and TGDDM epoxies are currently the most commonly used matrices for high performance fibrous composites. Systematic Fourier - transform infrared spectroscopy (FTIR) studies of the cure reactions of these epoxies are reported as a function of cure conditions, DDS concentration and the presence or absence of BF/sub 3/ catalyst. From these studies, the TGDDM epoxide was found to undergo homopolymerization to form either (CH/sub 2/OH)CH-CH(CH/sub 2/OH) or ether linkages in the absence of DDS. Such reactions are accelerated by epoxide impurities and a BF/sub 3/ catalyst and also occur in the presence of DDS. For TGDDM-DDS systems epoxide-amine addition reactions occur in which all primary amine and approx. 50% secondary amine groups are consumed. The BF/sub 3/ cured systems are more ductile relative to the noncatalyzed systems because they contain less network defects in the form of unreacted epoxide groups. Inhomogeneous mixing of the components together with the catalytic activity of the BF/sub 3/ catalyst in commercial TGDDM-DDS epoxies are also discussed.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5088272
• Report Number(s): UCRL-87821; CONF-821010-2; ON: DE82019239
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360302* -- Composite Materials-- Structure & Phase Studies-- (-1987)
AMINES
AROMATICS
BORON COMPOUNDS
BORON FLUORIDES
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CURING
EPOXIDES
FIBERS
FLUORIDES
FLUORINE COMPOUNDS
FOURIER TRANSFORMATION
HALIDES
HALOGEN COMPOUNDS
INFRARED SPECTRA
INTEGRAL TRANSFORMATIONS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
POLYMERIZATION
SPECTRA
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SULFONES
TRANSFORMATIONS