Results 171 to 180 of about 3,346 (221)

Graft Copolymerization of Pectin with Polyacrylamide

Polymer-Plastics Technology and Engineering, 2007
In the present study, an attempt has been made to modify pectin by grafting polyacrylamide using ammonium ceric sulphate as initiator. The effect of various variables like initiator concentration, monomer concentration, temperature and time has been studied.
R. K. Mishra, P. B. Sutar, J. P. Singhal, A. K. Banthia   +3 more
exaly   +2 more sources

The kinetics of graft copolymerization

Journal of Polymer Science, 1959
AbstractGamma‐ radiation induced graft copolymerization of methyl methacrylate with natural rubber is characterized by high yields of grafted polymer even at relatively high monomer concentrations. The rates are first order except at low monomer concentrations; above 95% rubber concentration the polymerization rates are very low.
W. Cooper, G. Vaughan
openaire   +1 more source

Electroinitiated graft copolymerization

Journal of Polymer Science: Polymer Chemistry Edition, 1980
AbstractA technique has been developed for initiating a graft copolymerization electrochemically. A copoly(styrene/vinylbenzophenone) linear copolymer was prepared to serve as the electroactive starting material. The benzophenone sites on this molecule are readily activated at the cathode.
B. Lionel Funt, Li‐Chien Hsu
openaire   +1 more source

Modification of Natural Biomass by Graft Copolymerization

International Journal of Polymer Analysis and Characterization, 2012
Natural biomasses such as natural fibers have been traditionally used as reinforcement in polymer biocomposites for structural applications. However, the resulting biocomposites are sensitive to harsh environmental conditions, which results in poorer properties in the biocomposites. Therefore, in the present study an attempt has been made to modify the
Thakur, V. K., Singha, A. S., Thakur, M. K.   +2 more
openaire   +3 more sources

Monomer reactivities in radiation‐induced graft copolymerization. Part II. Graft copolymerization to Teflon

Journal of Polymer Science, 1962
AbstractThe gamma radiation‐induced surface graft copolymerizations of styrene—acrylonitrile and styrene—methyl acrylate to Teflon were studied. It was observed that the compositions of the various grafted copolymers are richer in the more polar monomer than one would predict from the Lewis‐Mayo copolymer composition equation.
George Odian, Terese Acker, Albert Rossi, Elliot Ratchik   +3 more
openaire   +1 more source

Studies on the graft copolymerization of acrylonitrile

European Polymer Journal, 1988
Abstract Graft copolymers of acrylonitrile on bleached holocellulose and on starch were obtained at 29°C using ceric ions and the continuous initiation and depleted initiator methods. The extent of graft polymer formation (level of grafting and molecular weight of grafted chains) on starch was higher than on the bleached holocellulose.
A. Bazuaye, E.F. Okieimen, O.B. Said
openaire   +1 more source

Graft copolymerization by a preirradiation method

Journal of Polymer Science, 1960
AbstractFree radicals as well as peroxides are formed when irradiation of polyethylene is accomplished with the use of cobalt‐60 or a Van de Graaff electron accelerator, as radiation sources, even in the presence of air. The free radicals are able to induce graft copolymerization under low temperatures, in which peroxide grafting cannot occur. When the
Y. Shinohara, K. Tomioka
openaire   +1 more source

Graft copolymerization onto cellulosics

Progress in Polymer Science, 1984
Methodes de preparation des copolymeres greffes: greffage par reticulation, greffage par amorcage des sites actifs sur le squelette du polymere, limites et comparaison des diverses methodes de preparation. Facteurs affectant la copolymerisation greffee. Caracterisation: masse moleculaire, structure et morphologie.
S.N. Bhattacharyya, D. Maldas
openaire   +1 more source

Thermal Graft Copolymerization of Styrene with Rubber I. Kinetics of Graft Copolymerization of Styrene with Polybutadiene

1977
The changing of the overall rate of styrene polymerization and its constituents — homopolymerization rate and styrene grafting to the rubber in the interval of rubber concentration from 2 to 25% and in the temperature range 110–140°C was studied. Rubber works as a polymerization retarding agent when its concentration is at least 6% and with styrene ...
V. D. Yenalyev, N. A. Noskova, V. I. Melnichenko, O. P. Bovkunenko, O. M. Mezentseva   +4 more
openaire   +1 more source

Graft Copolymerization of Wool Fibers

Journal of Macromolecular Science, Part C: Polymer Reviews, 1992
Abstract Modification of the properties of natural and synthetic polymers through graft copolymerization has been a subject of interest of researchers for the last few decades. Grafting reactions provide a potential route for significantly altering the physical, mechanical, and biochemical properties of such polymers [1, 2].
Rajani K. Samal, Giti Sudha Giri
openaire   +1 more source