Results 231 to 240 of about 751,445 (279)

Ionic graft copolymerization. III. Graft copolymerization of β‐propiolactone onto polyacrylonitrile containing diketene units

Journal of Applied Polymer Science, 1967
AbstractPolyacrylonitrile (PAN)–β‐propiolactone (βPL) graft copolymer was synthesized by means of the ionic polymerization of βPL in the presence of polyacrylonitrile containing diketene units by using basic catalysts. A graft copolymer was produced by the copolymerization of βPL with the lactone ring in the trunk polymer.
Tetsuya Shiota, Yutaka Goto, Koichiro Hayashi, Seizo Okamura   +3 more
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Graft copolymerization via polymeric initiators

Journal of Polymer Science Part C: Polymer Symposia, 1967
AbstractPoly(styrene‐alt‐maleic anhydride) was prepared by polymerization in benzene, a nonsolvent for the product, and from it partial peresters were prepared in acetone solution, with t‐butyl hydroperoxide and pyridine used as catalyst. The partial peresters were used to initiate methyl methacrylate polymerization by a thermal mechanism in ...
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Vinyl Graft Copolymerization onto Cellulose

1981
Cellulose, in particular cotton, is the most widely used textile fiber. This preeminence is due to a happy combination of properties, such as abundance, low cost, fine cross-section, high strengh and durability, high thermal stability, good mechanical properties, ability to absorb moisture, easy dyeability, wearing comfort, etc.
Ali Hebeish, James Thomas Guthrie
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Graft copolymerization of acrylonitrile onto polystyrene

Journal of Polymer Science Part A: Polymer Chemistry, 1997
It is possible to graft vinyl monomers, such as acrylonitrile, onto polystyrene via anionic processes but not by a radical process. Both homopolymerization of the added acrylonitrile and graft copolymerization in which acrylonitrile units are added to the para position on the benzene ring in styrene occur; the conversion of acrylonitrile into polymer ...
Xue, Thomas J., Wilkie, Charles
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Crosslinking of Cotton through Graft Copolymerization

Textile Research Journal, 1976
Fabric samples were grafted with binary and ternary mixtures of selected vinyl monomers along with acrylamide onto cotton using ceric ammonium nitrate as catalyst from aqueous solution or emulsion, and subsequently polyacrylamide grafts were methylolated in situ and crosslinked.
V. N. Sharma, E. H. Daruwalla
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ESR Studies of Graft Copolymerization

1977
Under ionizing irradiation of solid polymers free radicals are formed which are trapped in a polymer matrix (see Chap. 5). Under certain conditions, these radicals can initiate graft polymerization. The grafting reaction is dependent on the physical state of the polymer and the properties of the free radicals formed in the polymer166, 356, 409, 410 ...
B. Rånby, J. F. Rabek
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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
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Graft copolymerization of dimethylacrylamide onto AFLAS

Journal of Applied Polymer Science, 1995
AbstractThe method of irradiation grafting of DMAA onto AFLAS (alternating copolymer of tetrafluoroethylene and propylene) films was studied. The effect of the solvent on the grafting yield was determined. As a result, it might be important to evaluate the blood compatibility of the films already grafted by using an in vitro test. Benzene tests seem to
Rafael Lopez, Victor Sanchez, Luz Alicia Fucugauchi, Kazushige Otsuhata   +3 more
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Photoinduced Graft Copolymerization onto selected fibers

Polymer Reviews, 1991
Abstract Although photopolymerization is one of the oldest methods for the initiation of vinyl polymerization, photografting is of recent origin. methods have been used for grafting vinyl monomers onto a large number of fibers by using a multitude of vinyI monomers with a view of improving some of the properties of the fibers to enhance better ...
Padma Nayak, Subasini Lenka
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Graft copolymerization with perester side groups

Journal of Polymer Science, 1961
AbstractThe kinetics of the graft copolymerization of styrene onto methyl acrylate (MA) and methyl methacrylate copolymers (MMA) containing tert‐butyl perester groups have been studied. The synthesis of these perester copolymers was carried out in two steps: (1) copolymerization of acrylyl chloride with methyl (meth)acrylate, and (2) reaction of the ...
G. Smets, A. Poot, G. L. Duncan
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