Effect of cure temperature and isocyanate index on the softening point of rigid polyurethane foam

Thermomechanical and mechanical spectrometry analyses were used to determine the influence of the cure temperature and the isocyanate index on the softening temperature of molded, rigid urethane foam. Foams were formulated from both polyether and polyester polyols, molded to a density of 350 kg/m/su...

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Bibliographic Details
Main Authors: Neet, T.E., Parker, B.G., Smith, C.H.
Language:unknown
Published: 2013
Subjects:
36 MATERIALS SCIENCE
FOAMS
CURING
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
CHEMICAL COMPOSITION
COMPRESSION STRENGTH
CYANATES
DENSITY
HEATING
POLYESTERS
POLYETHYLENE GLYCOLS
STABILITY
TEMPERATURE DEPENDENCE
URETHANE
CARBAMATES
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACID SALTS
COLLOIDS
DISPERSIONS
ESTERS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
Carbonic acid
Online Access:http://www.osti.gov/servlets/purl/6403925
https://www.osti.gov/biblio/6403925
Description
Summary:Thermomechanical and mechanical spectrometry analyses were used to determine the influence of the cure temperature and the isocyanate index on the softening temperature of molded, rigid urethane foam. Foams were formulated from both polyether and polyester polyols, molded to a density of 350 kg/m/sup 3/, and cured at various temperatures. Test results indicate that an increase in the cure temperature produces an increase in the softening temperature of the foam until a maximum value is achieved. An increase in the isocyanate index also increases the softening temperature within the 1.0 to 1.4 index range studied.

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