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Saturday, May 2, 2020 | History

2 edition of Radiation induced graft copolymerisation onto cellulose. found in the catalog.

Radiation induced graft copolymerisation onto cellulose.

N M. Da Costa

Radiation induced graft copolymerisation onto cellulose.

by N M. Da Costa

  • 132 Want to read
  • 35 Currently reading

Published in Bradford .
Written in English


Edition Notes

M.Sc. dissertation. Typescript.

SeriesDissertations
The Physical Object
Pagination74p.
Number of Pages74
ID Numbers
Open LibraryOL13655163M

UV radiation induced graft copolymerization of methacrylic acid onto natural lignocellulose (jute) fiber was carried out both by "simultaneous irradiation and grafting" and by preirradiation. Graft polymers are segmented copolymers with a linear backbone of one composite and randomly distributed branches of another composite. The picture labeled "graft polymer" shows how grafted chains of species B are covalently bonded to polymer species A. Although the side chains are structurally distinct from the main chain, the individual grafted chains may be homopolymers or copolymers.

  UV radiation induced graft copolymerization of methacrylic acid onto natural lignocellulose (jute) fiber was carried out both by “simultaneous irradiation and grafting” and by preirradiation methods using 1-hydroxycyclohexyl-phenyl ketone as a photoinitiator. In the “simultaneous irradiation and grafting” method, the variation of graft weight with UV-radiation time, monomer Cited by: Radiation-induced graft copolymerization of N-vinyl carbazole and methyl methacrylate onto cellulose acetate film.

Vinyl Graft Copolymerization onto Cellulose. James Thomas Guthrie. Pages Radiation-Induced Grafting onto Cellulosics. Ali Hebeish, James Thomas Guthrie. Pages Grafting by Chemical Activation of Cellulose. In assembling this text our aim was to present an informative account of the chemistry and technology of cellulosic. @article{osti_, title = {Homogeneous graft copolymerization of styrene onto cellulose in a sulfur dioxide-diethylamine-dimethyl sulfoxide cellulose solvent}, author = {Tsuzuki, M and Hagiwara, I and Shiraishi, N and Yokota, T}, abstractNote = {Graft copolymerization of styrene onto cellulose was studied in a homogeneous system (SO/sub 2/(liquid)- diethylamine (DEA)-dimethyl sulfoxide.


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Radiation induced graft copolymerisation onto cellulose by N M. Da Costa Download PDF EPUB FB2

Hebeish A., Guthrie J.T. () Radiation-Induced Grafting onto Cellulosics. In: The Chemistry and Technology of Cellulosic Copolymers. Polymers (Properties and Applications), vol by: 1.

Alessandro Gandini, in Comprehensive Polymer Science and Supplements, Grafting and blocking. Graft copolymerization of cellulose has stimulated Radiation induced graft copolymerisation onto cellulose. book research in past decades, starting in the early s. The vast majority of these studies call upon grafting from procedures by radical poly-addition and operate heterogeneously.

41–45 The most important problems which need to be. About the authors This book presents the reader with a story-based narrative of discovery and development of radiation-induced graft polymerization.

The report presented here accomplishes this by relating the inspiring account of research and development based on long-term collaboration among a professor, an engineer, and an entrepreneur.

Experiments on radioinduced graft copolymerization of binary mixtures such as butadiene -- styrene, butadiene-acrylonitrile, styrene-- acrylonitrile and some other systems onto cellulose and PVA (polyvinyl alcohol) fibers were carried out with the use of methanol as a solvent.

The γ‐ray–induced graft copolyinerization of cellulose and styrene by preirradiation was studied. (1) The graft copolymerization of cellulose and styrene was accelerated by immersing the cellulose in H 2 0 2 solution during γ number of active sites such as hydroperoxides was estimated by the ferrous ion method.

Graft copolymerisation studies Grafting procedure The wood-pulp cellulose used has a density of kgdm Acetone was employed as the solvent for the monomers; it was found to be a good solvent for the maleic anhydride block copolymers and consequently no Cited by: 7.

The modification of this nanomaterial via radiation-induced grafting approach represents a striking potential to be explored by academy and industry. In this article it is intended to highlight the recent works on the modification of cellulose and nanocellulose via radiation-induced graft copolymerization by conventional and RDRP by: 1.

Shukla and A. Athalye, Ultraviolet‐radiation induced graft‐copolymerization of hydroxyethyl methacrylate onto cotton cellulose, Journal of Applied Polymer Science, 44, 3, (), ().Cited by: The grafting of styrene/maleic anhydride and maleic anhydride/vinyl acetate onto cellulose from mixed monomer compositions has been studied as a preliminary to the use of the resulting graft copolymers in enzyme immobilisation studies.

Grafting has been shown to be effectively non-steady state in by: 7. Styrene has been grafted onto cellulose in the form of cotton linters, cotton cloth, and rayon by ionizing radiation.

Styrene was brought into intimate contact with cellulose by extension of the “inclusion” technique of Staudinger and Krässig, and graft copolymers were prepared by exposure to high energy electrons or to gamma‐rays from Co Ultraviolet-radiation-induced graft copolymerization of styrene and acrylonitrile onto cotton cellulose.

Effect of solvent on degree of grafting (%) for radiation induced grafting of GMA onto water hyacinth fibers. Grafting conditions: 30 kGy, 8 kGy h −1, 5% vol/vol GMA.

Results indicated that using methanol as solvent for GMA in the grafting process yielded the highest degree of grafting (∼95%) among the solvents by: Gamma-radiation induced graft copolymerization of vinyl monomer onto rayon" B N Misra, Inderjeet Kaur, Rayon or regenerated cellulose is the most vers-atile of all textile fibres.

The strength, elongation, Both chemical- and radiation-induced grafting onto rayon has been by: 1. Superabsorbent polymer (SAP) was synthesized by radiation-induced grafting of acrylamide (AM) onto carboxymethyl cellulose (CMC) in the presence of a crosslinking agent, N,N′-methylenebisacrylamide (MBA).

The effects of various parameters, such as dose, the amount of CMC, AM, MBA and ionic strength on the swelling ratio were investigated.

As a natural and the most abundant material, wood was used as a scaffold for the grafting of acrylonitrile (AN) and ethyl acrylate (EA) to develop a novel grafted wood.

Thus, chemical modification of the wood was carried out by means of grafting. It is clear from the characterization techniques (FTIR, SEM, and XRD) that grafting of acrylonitrile (AN) and ethyl acrylate (EA) was successfully.

METHODS OF RADIATION-INDUCED GRAFTING Radiation-induced grafting can be performed by two major methods: a mutual or simultaneous technique or a pre-irradiation technique [13]. Typically graft-ing is performed in solution or emulsion where the reaction medium is usually water with a small amount of surfactant (e.g.

Tween 20) [2, 14].File Size: KB. Radiation-induced graft copolymerization of mixtures of styrene and acrylamide onto cellulose acetate. Studies on some physical properties and structural characterization by means of scanning electron microscopy.

[Gamma radiation]. Sakurada, I., T. Okasa, Hatakeyama, and F. Kimura: Radiation-induced graft copolymerization onto cellulose and polyvinyl alcohol fibers with binary mixtures of comonomers.

Polymer Sci. C 4, (). CrossRef Google ScholarCited by:   Badawy SM, Dessouki AM, Nizam El-Din HM () Direct pyrolysis mass spectrometry of acrylonitrile–cellulose graft copolymer prepared by radiation-induced graft polymerization in presence of styrene as homopolymer suppressor.

Radiat Phys Chem – CrossRef Google ScholarCited by: The graft copolymerization of vinylbenzyl chloride (VBC) onto nylon-6 fiber was investigated by the pre-irradiation method using electron beam.

The effects of grafting parameters, monomer concentration, absorbed dose and reaction temperature were investigated. The empirical kinetic rate equation dGo/dt=k[M]^*[D]^ was used to describe grafting of VBC onto nylonCited by: 1.

Radiation induced grafting of viscose rayon fabrics, consisting mainly of cellulose fibers, with some acrylic acid derivatives, namely methyl acrylate, acrylamide and acrylonitrile, and also styrene, has been studied. The resultant graft yields have been.Graft copolymerization of polar vinyl monomers onto cellulose in the presence of oxidizing agents, ceric ion, and radiation has been presumed to be solely the result of propagation from radical.As an experimental example, the mutual radiation grafting of styrene onto ethyl cellulose film by use of 2-M.e.v.

Van de Graaff electrons to initiate free radical formation is described in detail.