Results 181 to 190 of about 3,346 (221)
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Characteristics of Heterophase Graft Copolymerizations
Journal of Macromolecular Science, Part A, 1992Abstract Persulfate-initiated graft copolymerizations of glutaraldehyde crosslinked gelatin with acrylic acid, acrylamide, vinyl acetate, and methyl methacrylate in the aqueous phase were investigated. It was observed that percentage grafting, molecular weights of the grafts, and grafting efficiencies were greatly influenced by the nature of the ...
D. Satyanarayana, P. R. Chatterji
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Graft copolymerization of acrylic acid on cellulose: Reaction kinetics of copolymerization
Journal of Applied Polymer Science, 1997Acrylic acid (AA) was grafted to cellulose by using ceric ammonium nitrate (CAN) initiator in aqueous nitric acid solution at 30, 50, 70, and 90°C during reaction periods of 30 to 180 minutes. About 45% of the AA was polymerized at 90°C after 180 minutes. The grafted polymer and homopolymer were isolated by acetone from the reaction mixture, dried, and
Gurdag, Gulten +2 more
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Graft copolymerization of lignosulfonate and styrene
Journal of Applied Polymer Science, 1979AbstractA study was made of the graft copolymerization of calcium lignosulfonate with styrene. Heterogenous copolymerization were carried out with methanol as swelling medium, using ferrous ion as catalyst, and ozone and/or hydrogen peroxide as initiator.
R. Chen, B. V. Kokta, J. L. Valade
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Journal of Applied Polymer Science, 1990
AbstractA method for photochemically induced graft copolymerization of acrylamide (AM) onto polypropylene (PP) film surface by a continuous presoaking process under nitrogen atmosphere has been developed. After removal of homopolymer formed, ESCA, UV spectroscopy, contact angle, and adhesion measurements confirmed a photografted layer on the surface of
Zhang Pei Yao, Bengt Rånby
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AbstractA method for photochemically induced graft copolymerization of acrylamide (AM) onto polypropylene (PP) film surface by a continuous presoaking process under nitrogen atmosphere has been developed. After removal of homopolymer formed, ESCA, UV spectroscopy, contact angle, and adhesion measurements confirmed a photografted layer on the surface of
Zhang Pei Yao, Bengt Rånby
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Graft copolymerization of glass fiber and its application
Journal of Applied Polymer Science, 1982AbstractModified glass fibers, containing unsaturated hydrocarbon surface groups, were prepared by a hydrothermal treatment, with allylglycidylether in excess as reagent. Graft polymerization of the treated glass fiber with styrene and methylmethacrylate was carried out in sealed tubes, under nitrogen, using benzoyl peroxide (BPO) and cumene ...
Koshiro Hashimoto +3 more
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Die Angewandte Makromolekulare Chemie, 1985
AbstractThe radiation‐induced graft copolymerization of methyl methacrylate onto nylon fibers was investigated at room temperature. The homopolymer was separated by soxhlet extraction. The graft yield increases with increase of dose rate from 0.1768 to 0.7072 Mrad. The percentage of grafting increase with increasing monomer concentration.
P. L. Nayak, S. Lenka, A. P. Das
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AbstractThe radiation‐induced graft copolymerization of methyl methacrylate onto nylon fibers was investigated at room temperature. The homopolymer was separated by soxhlet extraction. The graft yield increases with increase of dose rate from 0.1768 to 0.7072 Mrad. The percentage of grafting increase with increasing monomer concentration.
P. L. Nayak, S. Lenka, A. P. Das
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ESR Studies of Graft Copolymerization
1977Under 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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Journal of Applied Polymer Science, 2009
AbstractTamarind Kernel Powder (TKP) is derived from the seeds of Tamarindus indica Linn., a common and most important tree of India. It is extensively used in cotton sizing, as a wet‐end additive in the paper industry, as a thickening, stabilizing, and gelling agent in the food industry. However, because of its fast biodegradability there is a need to
Puja Goyal, Vineet Kumar, Pradeep Sharma
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AbstractTamarind Kernel Powder (TKP) is derived from the seeds of Tamarindus indica Linn., a common and most important tree of India. It is extensively used in cotton sizing, as a wet‐end additive in the paper industry, as a thickening, stabilizing, and gelling agent in the food industry. However, because of its fast biodegradability there is a need to
Puja Goyal, Vineet Kumar, Pradeep Sharma
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Development of functionalized cellulosic biopolymers by graft copolymerization
International Journal of Biological Macromolecules, 2013Natural lignocellulosic polymers are one of the most promising biodegradable, non-toxic and eco-friendly polymeric materials which have been used to develop various products for number of applications especially in green composites. However, these cellulosic materials have certain drawbacks, like sensitivity to water and moisture, and need to be ...
Vijay Kumar, Thakur +2 more
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Journal of Polymer Science: Polymer Chemistry Edition, 1980
AbstractGraft copolymerization of methyl methacrylate (MMA) was carried out on both defatted and bleached jute fibers using ceric ammonium sulfate (CAS) as the initiator. In order to obtain the optimum condition for grafting, the effects of initiator concentrations, temperature, time of reaction, lignin content of jute, and the monomer concentration ...
M. M. Huque +3 more
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AbstractGraft copolymerization of methyl methacrylate (MMA) was carried out on both defatted and bleached jute fibers using ceric ammonium sulfate (CAS) as the initiator. In order to obtain the optimum condition for grafting, the effects of initiator concentrations, temperature, time of reaction, lignin content of jute, and the monomer concentration ...
M. M. Huque +3 more
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