Abstract
The last symposium exclusively on the polymerization of cyclic ethers and sulfides held at an ACS meeting took place in Atlantic City in September 1965 [11. This survey is intended to give a general overview of the areas of active research since then and to summarize the progress that has been made in these areas. The polymerizations of cyclic ethers and cyclic sulfides are compared and contrasted. The influence of the size of the heterocyclic ring on the polymerization is described. In addition, the survey is intended to anticipate in a general way what the other participants in this symposium will discuss in detail so that the conference will seem more a single unit rather than a series of disconnected papers. As usual, limitations of time and space compel a certain selection process and no attempt has been made to be all-inclusive.