Solving organic chemistry problems
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Methylene diphenyl di-isocyanate (MDI) is used as an adhesive ----- it is often cross-linked with maleic anhydride when in the presence of water.
We are asked to explain and detail out the structural components of this reaction.
I have a theory 1A and theory 1B ----- my guess is that the maleic anhydride hydrolizes in water to create maleic acid. Then I think one of 2 things happens: a) the maleic acid attacks the CH2 functional group in the diagram attached......or b), it attacks the more reactive isocyanate (NCO) functional group in the diagram attached.
Can sometime please take a stab at this reaction ---- so I need an explanation and then a diagram of the by-product reaction! I really need your help!
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OTA 109368
Dr. Anandhi Ray
References:
1. Influence of Carboxylic Anhydrides on Selected Mechanical Properties of Heat-cured Resin
DOI: 10.1177/00220345910700121201
J DENT RES 1991 70: 1537
A. Peutzfeldt and E. Asmussen
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