Preparation and Analysis of Homo-Polymer and Copolymer from Tetra-Coordinate Silicate

2012 ◽  
Vol 550-553 ◽  
pp. 752-756
Author(s):  
Jian Hua Song ◽  
San Jun Fan
Keyword(s):  
Free Radical ◽  
Ethylene Glycol ◽  
Radical Polymerization ◽  
Methyl Acrylate ◽  
Potassium Hydroxide ◽  
Free Radical Polymerization ◽  
Organic Silicon ◽  
Vinyl Benzyl

Highly reactive penta-coordinate organic silicon was prepared by the reaction of silica with ethylene glycol and potassium hydroxide, which reacted with 4-vinylbenzyl chloride to synthesize a new 4-vinyl benzyl tetra-coordinate silicate (VBTCS), and the new monomer was homo-polymerized and copolymerized with styrene and methyl acrylate via free radical polymerization, respectively. Tetra-coordinate silicon monomer, homo-polymer, and copolymers were characterized by IR, EA, TG, DSC, GPC etc.

Investigation on pH-switchable (itaconic acid/ethylene glycol/acrylic acid) based polymeric biocompatible hydrogel

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106821-106831 ◽  
Author(s):  
M. Sakthivel ◽  
D. S. Franklin ◽  
S. Sudarsan ◽  
G. Chitra ◽  
S. Guhanathan
Keyword(s):  
Free Radical ◽  
Acrylic Acid ◽  
Ethylene Glycol ◽  
Radical Polymerization ◽  
Itaconic Acid ◽  
Free Radical Polymerization ◽  
Ph Sensitive ◽  
Water Medium ◽  
New Variety ◽  
Polymeric Hydrogels

A new variety of pH-sensitive polymeric hydrogels (IAE) have been developed and evaluated as biocompatible hydrogels using synergetic combinations of itaconic acid (IA), acrylic acid (AA), and ethylene glycol (EG) in water medium by free radical polymerization.

Experimental and Theoretical Study of the Self-Initiation Reaction of Methyl Acrylate in Free-Radical Polymerization

2018 ◽  
Vol 57 (2) ◽  
pp. 532-539 ◽  
Author(s):  
Hossein Riazi ◽  
Ahmad A. Shamsabadi ◽  
Michael C. Grady ◽  
Andrew M. Rappe ◽  
Masoud Soroush
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Methyl Acrylate ◽  
Theoretical Study ◽  
Free Radical Polymerization ◽  
The Self ◽  
Initiation Reaction

PHOTO-INITIATED FREE RADICAL POLYMERIZATION OF METHYL ACRYLATE IN AQUEOUS SOLUTION

1957 ◽  
Vol 35 (11) ◽  
pp. 1267-1277 ◽  
Author(s):  
C. Chaitanyan Menon ◽  
M. Santappa
Keyword(s):  
Aqueous Solution ◽  
Free Radical ◽  
Radical Polymerization ◽  
Methyl Acrylate ◽  
Free Radical Polymerization ◽  
Reaction Scheme ◽  
Ferrous Ion ◽  
Back Reaction ◽  
Photochemical Process ◽  
Initiation Of Polymerization

Photo-initiated free radical polymerization of methyl acrylate in aqueous solution is described. Using mainly light of wavelength 3650 Å and the ion pairs Fe3+OH− and Fe3+Cl− as photosensitizers the kinetics of polymerization were investigated by studying the effect of the variation of (i) intensity of light, (ii) concentration of monomer, (iii) fraction of light absorbed by the ion pair, and (iv) ferrous ion accumulating in, or initially added to, the system on (a) molecular weight of polymer, (b) the rate of disappearance of monomer, and (c) the rate of production of ferrous ion. The results have been analyzed in the light of a reaction scheme involving (1) a primary photochemical process and a dark back reaction, (2) initiation of polymerization by the primary product Fe2+OH or Fe2+Cl, (3) dissociation of the primary product, (4) a secondary dark back reaction, (5) initiation by a free radical, (6) propagation, and (7) termination. Examination of the experimental results in the light of the reaction scheme indicated that the initiation of polymerization was due to OH or Cl free radicals formed by the dissociation of the primary product and that termination occurred by combination of growing polymer chains. Some expressions involving specific rate constants have been evaluated.

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