The cure of rigid polyurethane encapsulating foam

Technical Report · Wed May 01 00:00:00 EDT 1991

OSTI ID:5488202

Adolf, D; Childress, C

The disappearance of isocyanate groups in 20 lb/ft{sup 3} rigid polyurethane encapsulating foam (44402-20) was monitored by FTIR spectroscopy leading to an activation energy of 4 kcal/mole. The disappearance of isocyanates can be due to either crosslinking reactions or gas production. Attempting to separate these two reaction paths, we measured the gel time and volume change during cure leading to activation energies of 5 and 6 kcal/mole for the crosslinking and foaming mechanisms respectively. 3 refs., 16 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5488202
• Report Number(s): SAND-91-0328; ON: DE91016059
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COLLOIDS
CROSS-LINKING
CURING
DISPERSIONS
ENERGY
FOAMS
GELATION
INFRARED SPECTRA
ISOCYANATES
KINETICS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTIC FOAMS
PLASTICS
POLYAMIDES
POLYMERIZATION
POLYMERS
POLYURETHANES
REACTION KINETICS
SPECTRA
SYNTHETIC MATERIALS