Thermal dissociation behavior of polymers with hemiacetal ester moieties in the side chain: The effect of structure on dissociation temperature

Hemiacetal Ester Exchanges, Study of Reaction Conditions and Mechanistic Pathway

A range of hemiacetal esters were synthesized by the reaction between carboxylic acids and butyl vinyl ether using n-dodecyl dihydrogen phosphate as catalyst. Specifically, nonanoic, propionic, acrylic, sebacic, and fumaric acids were used as substrates to prepare the corresponding hemiacetal esters. These compounds were used as model molecules to demonstrate the ability of hemiacetal ester functional groups to undergo the exchange reaction in the presence of weak carboxylic acids without any catalyst. Kinetics studies examined the eect of the carboxylic acid concentration on the exchange rate, and revealed that the exchange reaction proceeds through an associative mechanism.

Radical polymerization of ‘dehydroaspirin’ with the formation of a hemiacetal ester skeleton: a hint for recyclable vinyl polymers

A recyclable vinyl polymer was developed via radical polymerization of ‘dehydroaspirin’ derived from acetylsalicylic acid.