Preparation and heat of polymerization of 3‐methyl‐3‐butyl‐2‐azetidinone

Abstract

Abstract The synthesis of 3‐methyl‐3‐butyl‐2‐azetidinone, which forms a polymer which is soluble in a number of common solvents including toluene, chloroform, and carbon tetrachloride, is described. Anionic polymerization, carried out in toluene solution in a calorimetric vessel, yielded for the heat of polymerization of a four‐membered lactam −19.1 kcal/mole at 25°C.