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

Radiation induced graft copolymerisation onto cellulosic materials.

Keith Derek Nicholas Lawrence

Radiation induced graft copolymerisation onto cellulosic materials.

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Published by University of Birmingham in Birmingham .
Written in English

Edition Notes

Thesis (Ph.D.)- Univ. of Birmingham, Dept of Chemistry.

ID Numbers
Open LibraryOL19886618M

The treatment of archival material, more especially books and other bound volumes. The invention provides a process for the treatment of archival material, which comprises the radiation-induced polymerisation, within the paper, of a vinyl monomer or a monomer mixture comprising one or more vinyl monomers, irradiation being carried out in the presence of the monomer or Cited by: ficient methods for modifying the properties of cellulosic fibers because it is effective and consumes less time [8]-[10]. Different researchers have studied the graft copolymerization of vinyl monomers onto cellulosic fibers [11]-[13]. Synthesis of graft copolymers under the influence of microwave radiation was studied [15][14]. Graft. Cellulose nanocrystals (CNC) have become the subject of increasing research interest because of their unique physical, chemical and mechanical properties, including being a renewable material. While CNC shows promise as a reinforcing material in polymer-based composites, the hydrophilic surface of CNC makesCited by:

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Radiation induced graft copolymerisation onto cellulosic materials. by Keith Derek Nicholas Lawrence Download PDF EPUB FB2

Graft copolymerization of vinyl monomers onto natural polysaccharides (starch, cellulose, guar gum, chitosan, pectin, etc.) is the most promising technique given its functionalization of those biopolymers proper to their potential by giving them desirable properties. Cellulose gains different physical and/or chemical properties depending on the.

γ‐Radiation‐Induced Graft Copolymerization of Ethyl Acrylate onto Hydroxypropyl Methylcellulose August Macromolecular Materials and Engineering (8) - RADIATION-INDUCED GRAFT POLYMERIZATION 93 C.

Determination of kO2/kt Chandler et al. {12), in one of the first studies designed to investigate in detail the kinetics of radiation-induced graft polymerization, applied Eq.

(20) to the grafting of styrene to by: 4. Kinetic behaviour of graft copolymerisation of glycidyl methacrylate onto nylon-6 fibres in solvent- and emulsion- media was investigated. The order for the dependence of the initial rate of grafting on the Radiation induced graft copolymerisation onto cellulosic materials.

book concentration for solvent and emulsion grafting systems were found to be andrespectively. The order of dependence of the initial rate of Cited by: 5.

The radiation‐induced graft polymerization of styrene to low density polyethylene was investigated. It was found that dilution of the styrene monomer with methanol accelerates the rate of graft polymerization with a maximum effect occurring at approximately 70 vol.‐% methanol.

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 Radiation induced graft copolymerisation onto cellulosic materials. book VBC onto nylonCited by: 1. The radiation induced graft polymerization is a well-known method to obtain new materials.

Until recently, only conventional radiation sources, such as Co and electron beams, were used. The full text of this article hosted at is unavailable due to technical difficulties. techniques of graft copolymerization and blending have acquired importance in improving the performance of materials ().In this study we concentrate on the grafting technique, which could be achieved by several methods such as chemical, photochemical, enzymatic, radiation and plasma induced techniques[1].

The influence of the major grafting parameters (irradiation dose, reaction time, and inhibitor concentration) on graft polymerization of glycidyl methacrylate from its 10% solution in methanol onto nonwoven polypropylene upon irradiation with Cited by: 4.

TRANSFER GRAFT POLYMERIZATION Olgun Güven Department of Chemistry Hacettepe University Beytepe, Ankara, Turkey Paper presented at the International Conference on “Recent Developments and Applications of Radiation induced graft copolymerisation onto cellulosic materials.

book Technologies, 16 SeptemberBialowieza, Poland RADIATION INDUCED GRAFT POLYMERIZATION. *Correspondence: E-mail The Graft Copolymerisation of Acrylamide onto Cellulose using Enhanced Fe2+ / H 2O2 redox initiator system 1JIDEONWO, A; *2ADIMULA, H A 1 Department of Chemistry, Radiation induced graft copolymerisation onto cellulosic materials.

book of Benin, Benin City, Nigeria 2 Department of Industrial Safety and Environmental Science, Petroleum Training Institute, Effurun, Delta by: 4. The graft yield (%) has been determined as a func-tion of different variables that influence grafting.

The effect of ferrous ammonium sulphate (FAS) as additive on grafting has also been studied. A plausible mechanism of radiation-induced grafting has been suggested.

2 Materials and Methods Viscose rayon was obtained from Grasim In-Cited by: 1. It was found that the weight of thrombus formed on grafted PVC was less than that of PVC Radiation induced graft copolymerisation onto cellulosic materials. book glass and decreased with the increase in the graft level.

The adhesion of platelets on grafted PVC was retarded after grafting with MAA hydrogels. PMID: [PubMed - indexed for MEDLINE] MeSH Terms. Biocompatible Materials* Hemolysis; Humans; In Cited by: polymeric materials is to graft monomers onto them by using an irradiation technique known as radiation-induced grafting.

Radiation-induced grafting method has the advantages such as simplicity, low cost, control over process and adjustment of the materials composition and structure.

In addition, this method assures the grafting of. 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.

Graft Polymerization ofAcrylamide and 2-Acrylamidomethylpropanesulfonic Acid onto Starch GEORGEF. FANTA, ROBERT C. BURR, and WILLIAM M. DOANE, Northern Regional Research Center, AgriculturalResearch, Science and Education Administration, U.S. Department ofAgriculture, Peoria, Illinois SynopsisCited by: One-step radiation-induced graft polymerization was performed using vinyl monomers in the presence of MWNTs in order to use biosensor supports.

From these results we concluded the following. Radiation-induced graft polymerization of the functionalized vinyl monomer could introduce very simply and easily a functional group onto the MWNT by: 2. "Kinetics of Radiation-induced Graft Copolymerization of 2-Hydroxyethyl Methacrylate onto Silicone Rubber Films” J.

Macromol. Sci.-Chem.A27(1), Associated People. Int J Appl Radiat Isot. Aug; The radiation-induced graft copolymerization of 4-vinyl pyridine to terylene. HOULTON MR, THOMAS by: 1. Acrylamide and methylmethacrylate monomers were grafted onto bleached cellulosic fibres using K 2 S 2 O 8 and a redox system of K 2 S 2 O 8-Na 2 S 2 O 5 as initiators at room temperature while varying time, monomer concentration and concentration of initiator.

The study have shown that percentage grafting increases as the concentration of monomers. els of graft substitutions ( to polystyryl chains per cellulosic chain and molecular weights ranging fromto ,) would be poor interfacial compatibilizers.

In fact, the high molecular weights of the grafts and the low levels of graft substitution would make these materials behave more like blends than graft polymers. In recent years, the use of ceric ions to initiate the graft copolymerisation of vinyl monomers on cellulose materials has received much attention from the practical and fundamental points of view Grafting of polysaccharides in general, is of interest because of its potential as a technique for modifying the.

Copolymerisation of trioxane (TOX) with penta‐acetyl‐glucose (PAG) in the solid state was investigated by gamma radiation. Effects of radiation doses, PAG concentration, and related parameters were studied and compared with that of the homopolymerisation of TOX. The yield of copolymer was lower than homopolymer and only a fraction of the PAG taken entered into the.

Graft copolymerization of acrylic acid (AA) onto Poly(ethylene terephthalate) (PET) fabrics with the aid of benzoyl peroxide was carried out. The effect of polymerization parameters on the graft yield was studied. Percent grafting was enhanced significantly by increasing benzoyl peroxide (BP) concentrations up to g/lit and then decreased upon further increase in initiator Cited by: Polysaccharides are the most abundant natural organic materials and polysaccharide based graft copolymers are of great importance and widely used in various fields.

Natural polysaccharides have recently received more attention due to their advantages over synthetic polymers by being non-toxic, biodegradable and available at low cost. Radiation Induced Graft Copolymerization ofMethyl Methacrylate on Natural and Modified Wool: Part IV-Mechanical Properties D SoVARMA & R K SADHIR* Fibre Science Laboratories, Indian Institute of Technology, New Delhi Received 6January ; accepted 7 May Author: D S Varma, R K Sadhir.

Frontiers Events is a rapidly growing calendar management system dedicated to the scheduling of academic events. This includes announcements and invitations, participant listings and search functionality, abstract handling and publication, related events and post-event exchanges.

Whether an organizer or participant, make your event a Frontiers Event. Free-Radical Initiated Graft Polymerization of Vinyl Monomers onto Cellulose JETT C.

ARTHUR JR. Chapter 2, DOI: /bkch Publication Date (Print): J The extraction of recycled newspapers (RNP) cellulose pulp began by a series of chemical alkali extraction, 5 wt% NaOH at °C for 2 h.

Subsequently, the bleaching of Cited by: 2. Thermoreversible hydrogel based on radiation induced copolymerisation of poly(N-isopropyl acrylamide) and poly(ethylene oxide) †.

RADIATION-INDUCED OXIDATION OF POLYMERS Ewa M. Kornacka Institute of Nuclear Chemistry and Technology, Doro Warszawa, Poland 1. INTRODUCTION A polymer is a macromolecule formed by the combination of simple molecules, monomers, of low molecular weight. A polymer molecule usually has at least atoms linked by covalent Size: KB.

• Radiation grafting ofacrylicacid and acrylonitrile improves oil resistance of butadiene­ styrene copolymer, and ofethylene-propylene­ diene terpolymer • Encapsulated Fertilizer • Successive radiation grafting ofmethyl methacrylate, followed byvinylidene chloride, on carbamide (carbamide/polymer, 95/5) to a dose ofFile Size: KB.

Cellulose-Based Graft Copolymers: Structure and Chemistry discusses the synthesis, characterization, and properties of multifunctional cellulose-based graft copolymers. Presenting the contributions of accomplished experts in the field of natural cellulosic polymers, this authoritative text:Format: Hardcover.

The stimuli-responsive properties of cellulose graft polymers are summarized and the stimuli-induced assemblies of cellulose graft copolymers can be used as carriers for drug and gene delivery. The graft modified cellulose materials can be applied in varies fields, including smart materials, adsorbents, and antibacterial materials and protein.

Cellulose-Based Graft Copolymers: Structure and Chemistry - Kindle edition by Vijay Kumar Thakur. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Cellulose-Based Graft Copolymers: Structure and Chemistry.

b), and cellulose graft copolymers (Chauhan et al. In recent years, several papers on cellulose grafting material, by atom transfer radical polymerization (ATRP) (Vlcek et al. ), free radical graft copolymerization (Littunen et al. ), and simultaneous gamma radiation initiation method (Chauhan et al.

) have been published. Modification of cotton fabric with 2-methacryloyloxyethyltrimethyl ammonium chloride (DMC) was achieved through free-radical initiated graft polymerization with K2S2O8/NaHSO3 as the initiator.

Grafting of DMC was confirmed by ATR-IR of the modified cotton. The optimal grafting reaction conditions, including DMC dosage, mole ratio of initiator to DMC, temperature, and time, were Author: Wei Ma, Sen Du, Shumin Yan, Xiaolin Yu, Zhongjian Zhang, Shufen Zhang.

• Radiation crosslinking forthe production of heat shrinkproducts would continue to grow • Since radiation crosslinked PE has better insulator properties, this would also remain a growth area • Radiation processing has enabled the plastics industryto expand the scope oftheir markets • Continuing R&D should further expand the use ofFile Size: 89KB.

Radiation crosslinking of cellulose fibers to obtain rigid lightweight paperboard Mikaela Börjesson Department of Chemical and Biological Engineering CHALMERS UNIVERSITY OF TECHNOLOGY ABSTRACT Cellulosic materials are used in a wide range of areas of application, and one of these is paperboard for packaging solutions.

We demonstrate how 15N labelling can be used to pdf the success of ‘grafting to’ processes, through the preparation of well-defined graft copolymers of hydroxyethyl cellulose by combining RAFT polymerisation and copper-catalysed azide-alkyne cycloaddition (CuAAC).

Using synthesised alkyne-functionalised chain transfer agents, short-chain (DP = 10) poly(N Cited by: 3.environmental and radiation stabilities for both pre-formed parts and bulk materials [6, 7].

The effect of gamma irradiation on the surface microhardness of polyblends has been studied to detect radiation-induced crosslinking [8]. Besides the radiation crosslinking of hydrogels and orthopedic devices, radiation processing can have other.Radiation Induced Synthesis of Ebook Polymers and their Metal Nanocomposites Zhenpeng Cui To cite this version: Zhenpeng Cui.

Radiation Induced Synthesis of Conducting Polymers and their Metal Nanocomposites. Material chemistry. Université Paris-Saclay, English. ￿NNT: SACLS￿. ￿tel￿.