Poly(vinyl ether)s, Poly(vinyl ester)s, and Poly(vinyl halogenide)s
Vinyl ethers comprise that class of oleﬁnic monomers which possess a double bond situated adjacent to an ether oxygen. These monomers include those compounds which have various substituents attached to the carbon atoms of the double bond as well as the unsubstituted compounds. Due to the presence of the neighboring oxygen atom, the double bond possesses a highly electronegative character, a feature that dominates both the organic and polymer chemistry of these compounds. The analogous vinyl thioethers are also known  and their chemistry closely parallels that of their corresponding vinyl ether counterparts. Beginning with the accidental discovery by Wislicenus  that elemental iodine catalyzes the violent exothermic polymerization of ethyl vinyl ether, the polymerization of these monomers has been the subject of many investigations over the years and continues to occupy the attention of investigators today. In particular, the ﬁeld of the cationic polymerization of vinyl ethers is a very lively ﬁeld engaging the eﬀorts of academic as well as industrial workers. Apart from the interesting chemistry of these compounds, the chief incentive for these eﬀorts is their versatility in a wide variety of technical applications. Among the many uses of poly(vinyl ethers) and their copolymers are applications such as adhesives, surface coatings, lubricants, greases, elastomers, molding compounds, ﬁlms, thickeners, anticorrosion agents, ﬁber and textile ﬁnishes, and numerous others.