Anionic Polymerization Of Vinyl Chloride

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

Anionic polymerization of vinyl chloride.

Anionic polymerization of vinyl chloride has been studied. They make up largest family of polymers. 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. Free radical polymerization frp is a method of polymerization by which a polymer forms by the successive addition of free radical building blocks.

Often anionic polymerization involves living polymerizations which allows control of structure and composition. Copolymerization initiated by n butyllithium. 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.

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. Thus in this chapter general aspects of cationic polymerization are discussed followed by a brief overview of early development of living cationic polymerization. Bulletin of the chemical society of japan 1962 35 3 395 399. Arihiro kanazawa shokyoku kanaoka and sadahito aoshima.

The mechanism of radical polymerization is illustrated below for the polymerization of chloroethene vinyl chloride. B data of talamini et a1 21y22 radical 50 cb radical 0. Anionic addition polymerization is a form of chain growth polymerization or addition polymerization that involves the polymerization of monomers initiated with anions. Polymerization in bulk at 0 c.

Polymerization of vinyl chloride with butyllithium and its complexes v. 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. Following its generation the initiating free radical adds nonradical monomer units thereby growing the polymer chain. Macromolecules 2010 43 6 2739 2747.

Anionic polymerization of vinylidene chloride. Q as is typical for initiating radical reactions an initiator usually a peroxide is employed. Relationship between polymerization behavior and the nature of lewis acids. Sklizkova institute of macromolecula compounds u s s r.

Anionic polymerization of vinylidene chloride. Abbis polymer group department of organic chemistry chalmers university of technology goteborg sweden. The type of reaction has many manifestations but traditionally vinyl monomers are used.