Anionic Polymerization Of Vinyl Chloride

The mechanism of radical polymerization is illustrated below for the polymerization of chloroethene vinyl chloride.

Anionic polymerization of vinyl chloride.

Macromolecules 2010 43 6 2739 2747. 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. Polymerization in bulk at 0 c. Free radicals can be formed by a number of different mechanisms usually involving separate initiator molecules.

That is small molecules containing carbon carbon double bonds. Bulletin of the chemical society of japan 1962 35 3 395 399. Abbis polymer group department of organic chemistry chalmers university of technology goteborg sweden. Arihiro kanazawa shokyoku kanaoka and sadahito aoshima.

Thus in this chapter general aspects of cationic polymerization are discussed followed by a brief overview of early development of living cationic polymerization. Anionic polymerization of vinylidene chloride. Anionic polymerization of vinylidene chloride. 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.

B data of talamini et a1 21y22 radical 50 cb radical 0. 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. Anionic addition polymerization is a form of chain growth polymerization or addition polymerization that involves the polymerization of monomers initiated with anions. They make up largest family of polymers.

Of the organometallic compounds tested as initiators only butyllithium was found to initiate polymerization. Copolymerization initiated by n butyllithium. Polymerization of vinyl chloride with butyllithium and its complexes v. Living cationic polymerization of vinyl ether with methanol metal chloride initiating systems.

Q as is typical for initiating radical reactions an initiator usually a peroxide is employed. Often anionic polymerization involves living polymerizations which allows control of structure and composition. 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. Sklizkova institute of macromolecula compounds u s s r.

Following its generation the initiating free radical adds nonradical monomer units thereby growing the polymer chain. Relationship between polymerization behavior and the nature of lewis acids. Anionic polymerization of vinyl chloride has been studied.