vinyl polymerization

vinyl polymerization

[′vīn·əl pə‚lim·ə·rə′zā·shən]
(organic chemistry)
Addition polymerization where the unsaturated monomer contains a CH2=C‒group.
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PIB is made from isobutylene through cationic vinyl polymerization. It is manufactured in different forms, such as conventional PIB and HR-PIB.
(12.) Padhi, NP, Singh, BC, "Vinyl Polymerization of Acrylonitrile by the Ce(IV)-Glucose Redox System." Colloid Polym.
Previtali, "Photoinitiated vinyl polymerization by safranine T/triethanolamine in aqueous solution," Polymer, vol.
The synthesis of a branched polyacrylamide using a supernormal valence transition metal, such as potassium diperiodatocuprate [K.sub.5][Cu[(HI[O.sub.6]).sub.2]](Cu(III)), as an initiator, in alkaline medium, and being capable of initiating the self-condensing vinyl polymerization (SCVP) of acrylamide, and then the branched polyacrylamide was obtained [13].
Donnet and Henrich (37) have proposed an aroxylic structure having localized free-radicals on the surface and explained the inhibition in vinyl polymerization by the so-called quinone radical theory.
Among the topics are the synthesis of hyperbranched polymers via polymerization of functionally symmetric monomer pairs, self-condensing vinyl polymerization, hyperbranched co-polymers synthesized by co-condensation and radical co-polymerization, hyperbranched and dendritic polyolefins prepared by transition metal catalyzed polymerization, the kinetic theory of hyperbranched polymerization, and biological and medical applications.
With literally thousands of commercial uses, this production method has become a subject of considerable research in both the physical and organic chemistry of radical vinyl polymerization. Contributors here, who are recognized experts, emphasize radical initiating systems and mechanisms of action as the survey the most recent advances, prices and methods, technologies, and applications of free radical vinyl polymerization.
The former is a vinyl polymerization and proceeds through carbenium ion formation while the latter is ring opening generating an active species known as an onium ion.
Photoinitiated free radical polymerization of acrylates and methacrylales has enormous commercial importance and has gained much attention because of extensive industrial applications such as curing of coatings on various materials, adhesives, printing inks and photoresizts which are based on photoinitiated radical vinyl polymerization. Since the efficiency of a photopolymerization reaction is governed in part by the reactivity of the photoinitiating system there is still growing interest in synthesizing new photoinitiators and in the study of the photophysical and photochemical processes involved in the excited states of the photoinitiator (1-3).
Onyon, Kinetics of Vinyl Polymerization by Radical Mechanisms, Butterworths, London (1958).
The self-condensing vinyl polymerization (SCVP) of p-chloromethyl styrene (CMS) using metal-catalyzed living radical polymerization catalyzed by the complex CuCl/2,2'-bipyridyl has been attempted [29].
However, diallyl polymerization has not received as much attention in scientific literature as the corresponding vinyl polymerization, since it is more difficult to polymerize allyl monomers using free radical initiators than vinyl ones (5-7).