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Catalyst to Reduce Cure Temperature in Bonding Wood with MDI
A wood chemistry course that indicates that methylene diphenylisocyanate (MDI) is used as a common resin and/or glue in bonding wood fibers together in composite type substrates. The cure temperature is given as approximately 425 degrees F.
A test question that asks us to hypothesize about a chemical additive to the MDI resin/glue that might either speed its cure time reaction or cause the cure to be at a lower temperature....say 375 degrees F.
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HFC's (hydrofluorocarbons) are replacing CFC's (chlorofluorocarbons) because the C-H and C-F bonds are stronger than C-Cl bonds. If the bond enthalpy of a C-F bond is 482 kJ/mol.
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