Anionic Polymerization Of Vinyl Chloride

Living cationic polymerization of vinyl ether with methanol metal chloride initiating systems.

Anionic polymerization of vinyl chloride.

Anionic addition polymerization is a form of chain growth polymerization or addition polymerization that involves the polymerization of monomers initiated with anions. Anionic polymerization of vinylidene chloride. Anionic polymerization of vinyl chloride has been studied. Academy of sciences received 10 january 1967 in the anionic polymerization of vinyl chloride vc especially with lithium alkyls ill the termination step is a major factor and this leads to rapid slowing dowel of the.

Anionic polymerization of vinylidene chloride. Abbis polymer group department of organic chemistry chalmers university of technology goteborg sweden. Often anionic polymerization involves living polymerizations which allows control of structure and composition. Sklizkova institute of macromolecula compounds u s s r.

Arihiro kanazawa shokyoku kanaoka and sadahito aoshima. Polymerization of vinyl chloride with butyllithium and its complexes v. Following its generation the initiating free radical adds nonradical monomer units thereby growing the polymer chain. B data of talamini et a1 21y22 radical 50 cb radical 0.

Q as is typical for initiating radical reactions an initiator usually a peroxide is employed. Of the organometallic compounds tested as initiators only butyllithium was found to initiate polymerization. They make up largest family of polymers. Let s see how we get from a vinyl monomer to a vinyl polymer using for an example the simplest vinyl polymer polyethylene polyethylene is made from the monomer ethylene which is also called ethene when polymerized the ethylene molecules are joined along the axes of their.

Anionic polymerization of vinyl chloride table iv chain branching in pvc prepared by anionic and radical polymerization sample mn chj1000 c atoms 2a 3a 4a a chain branching of these samples determined by dr. Polymerization in bulk at 0 c. Free radical polymerization frp is a method of polymerization by which a polymer forms by the successive addition of free radical building blocks. Thus in this chapter general aspects of cationic polymerization are discussed followed by a brief overview of early development of living cationic polymerization.

Free radicals can be formed by a number of different mechanisms usually involving separate initiator molecules. Cationic polymerization of polar monomers such as vinyl ethers and styrene derivatives played a critical role in accomplishing ideal living cationic polymerization of vinyl type monomers. The mechanism of radical polymerization is illustrated below for the polymerization of chloroethene vinyl chloride. That is small molecules containing carbon carbon double bonds.

Copolymerization initiated by n butyllithium. Q the repeat structure of the final polymer is written as. Relationship between polymerization behavior and the nature of lewis acids.