The polyester from 29.19 can be mixed with additional
Chapter 29, Problem 29.2(choose chapter or problem)
The polyester from 29.19 can be mixed with additional phthalic anhydride (0.5 mole of phthalic anhydride for each mole of 1,2,3-propanetriol in the original polyester) to form a liquid resin. When this resin is heated, it forms a hard, insoluble, thermosetting polyester called glyptal. (a) Propose a structure for the repeat unit in glyptal. (b) Account for the fact that glyptal is a thermosetting plastic.
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