“…It has been shown (10,19) that association becomes greater or more pronounced as the molecular weight is increased through polymerization, and that the structural or shape factors which distinguish the soluble forms of threedimensional polymerides from the linear polymerides likewise contribute to the powers of association, have also been shown. Association, like polymerization, may then be related to the molecular architecture, particularly to the functionality and to the nature of the functional groups.…”