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Dissertations / Theses on the topic 'Polymers and polymerization, Effect of radiation on'

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Published: 4 June 2021

Last updated: 28 July 2025

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1

McHerron, Dale C. "Creation and modification of polymeric materials using electron beam radiation." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39936.

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2

Nguyen, Duc Ngoc. "Effects of solvents and comonomers on radiation curing and grafting processes /." View thesis, 2002. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20031008.120616/index.html.

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Thesis (PhD) -- University of Western Sydney, 2002.<br>"A candidate for the degree of Doctor of Philosophy." "A thesis submitted in the School of Science, Food and Horticulture, University of Western Sydney." "June 2002" Bibliography: leaves 303 - 305.

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3

QUEIROZ, ALVARO A. A. de. "Obtencao de copolimeros de enxerto via radiacao ionizante caracterizacao e estudo de suas propriedades hemocompativeis." reponame:Repositório Institucional do IPEN, 1993. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10347.

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Nguyen, Duc Ngoc. "Effects of solvents and comonomers on radiation curing and grafting processes." Thesis, View thesis, 2002. http://handle.uws.edu.au:8081/1959.7/712.

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A study has been made on the irradiation induced grafting of MMA to PPE and cellulose subtrates in the presence of various solvents and Irgacure 819 photoinitiator, a new photoinitiator on the market at the commencement of this project. UV is the main irradiation source used. The grafting yields have been found to vary with parameters such as the subtrate types and thickness, MMA concentration, solvents used, Irgacure 819 concentration and UV doses. For the cellulose subtrate, good grafting yields were obtained only when solvents such as methanol and DMF were used. On the contrary, MMA could g

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5

Zwaneveld, Nikolas Anton Amadeus Chemical Engineering &amp Industrial Chemistry UNSW. "Surface grafting of polymers via living radical polymerization techniques; polymeric supports for combinatorial chemistry." Awarded by:University of New South Wales. Chemical Engineering and Industrial Chemistry, 2006. http://handle.unsw.edu.au/1959.4/33361.

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The use of living radical polymerization methods has shown significant potential to control grafting of polymers from inert polymeric substrates. The objective of this thesis is to create advanced substrates for use in combinatorial chemistry applications through the use of g-radiation as a radical source, and the use of RAFT, ATRP and RATRP living radical techniques to control grafting polymerization. The substrates grafted were polypropylene SynPhase lanterns from Mimotopes and are intended to be used as supports for combinatorial chemistry. ATRP was used to graft polymers to SynPhase lante

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6

Polat, Ozlem. "Polymerization And Polymer Characterization Of N-vinylcaprolactam." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606681/index.pdf.

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In this study, N-vinylcaprolactam was polymerized by radiation in the solid state. The polymerization was carried out at room temperayure under vacuum and open to atmosphere respectively. The polymerization mechanism showed autoacceleration and the rate of polymerization was higher in the presence of oxygen. However the limiting conversion was 100% under vacuum conditions and 90% in the present of oxygen. This is due to the low molecular weight olgomer formation in the presence of oxygen. The polymers were characterized by FT-IR, NMR, DSC, TGA, Light Scattering, GPC, Viscosity, X_Ray and mass

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7

Altinsoy, Sule. "Polymerization And Characterization Of N-vinyl-2-pyrrolidone." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611238/index.pdf.

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N-vinyl-2-pyrrolidone, NVP, was polymerized by &amp<br>#56256<br>&amp<br>#56394<br>-radiation in the presence of atmospheric oxygen and under vacuum at different periods. Polymerization also conducted by using chemical initiator, &amp<br>#56256<br>&amp<br>#56466<br>-Azoisobutyronitrile, AIBN, in bulk at different temperatures and times. The activation energy for polymerization was found from Arrhenius plot as 31,8 kJ/mol. By using the Fox-Flory equation T&amp<br>#56256<br>&amp<br>#56394<br>and k values calculated for each polymerization methods. The polymer obtained was white gel type. The dif

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8

ALMEIDA, ARLETE T. "Obtencao de superficies hemocompativeis por meio da modificacao de materiais polimericos pela radiacao ionizante." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10834.

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9

Pattenden, Caroline Sarah. "The effect of radiation on the thermal stability of polyisobutylene." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366649.

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10

Ozdemir, Tonguc. "Effect Of Ionizing Radiation On Different Polymers And Possible Use Of Polymers In Radioactive (nuclear) Waste Management." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607296/index.pdf.

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In this study three polymers, namely poly(carbonate urethane), poly(bisphenol-a-epichlorohydrin) and poly(methyl methacrylate), were selected and change of properties with gamma treatment were studied. Two different dose rates were used for irradiations and the properties of the irradiated polymers exposed to same total absorbed dose were compared. In addition, long irradiations of up to about six months with high dose rate were done in order to understand the radiation stability of the polymers, which may be possible candidates for embedding media for low and intermediate level radioactive (n

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11

Buschle, William. "Effect of Polymerization Variables on the Properties of Poly(N-Ethyl aniline)." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1305893685.

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12

Ozdemir, Serife. "Synthesis Of New Ferrocenyl Substituted Quinoxaline Derivative Monomers, Their Polymerization And Electrochemical Behaviors." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612390/index.pdf.

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5,8-Bis(2,3-dihydrothieno[3,4b][1,4]dioxin-5-yl)-2-(naphthalen-2-yl)-3-ferrocenyl-4a,8a-dihydroquinoxaline (DEFNQ), 5,8-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2-(phenyl)-3 ferrocenylquinoxaline (DEFPQ) and 5,8-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2,3-di(naphthalen-2-yl)quinoxaline (DEDNQ) were synthesized, electrochemically polymerized and electrochromic properties of resultant polymers were investigated. For the characterization of the monomers Nuclear Magnetic Resonance (1H-NMR, 13C-NMR) were used. Cyclic Voltammetry (CV) and Ultraviolet&ndash<br>Visible Spectroscopy were use

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13

Anacoglu, Elif. "Polymerization And Polymer Characterization Of Acetylenedicarboxylic Acid Monopotassium Salt." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605797/index.pdf.

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Acetylenedicarboxylic acid monopotassium salt, ADCA-K, was polymerized by radiation induced solid-state and chemical initiator induced solution polymerization methods. Radiation induced solid-state polymerization was carried out by Co-60 g-radiation at room temperature. The powder polymer obtained was soluble in water but insoluble in common organic solvents. The solution polymerization initiated by benzoylperoxide was carried out in an oil bath at 90&deg<br>C. The polymer obtained was soluble in water but insoluble in dimethylsulfoxide. In the first stage of the polymerization, H2O, CO and/or

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14

Shaabin, Maram. "The effect of inhibitor and initiator concentration on degree of conversion, flexural strength and polymerization shrinkage." Connect to resource online, 2009. http://hdl.handle.net/1805/2113.

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Thesis (M.A.)--Indiana University School of Dentistry, 2009.<br>Title from PDF t. p. (viewed Mar. 30, 2010) Advisor(s): Gabriel Tien-Min Chu, Chair of the Research Committee, Melvin R. Lund, Bruce A. Matis, Carlos Gonzalez-Cabezas, Michael A. Cochran. Curriculum vitae. Includes abstract. Includes bibliographical references (leaves 79-87).

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15

Dallas, George. "Fundamental experiments on the response of solutions, polymers, and modified polymeric materials to electromagnetic radiation." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07282008-134534/.

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16

LUGAO, ADEMAR B. "Estudos da sintese por irradiacao, da estrutura e do mecanismo de formacao de polipropileno com alta resistencia do fundido." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11212.

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17

Eroglu, Damla. "Electrochemical Synthesis Of Poly(methylsilyne), And The Effect Of Silicon-based Preceramic Polymers On The Properties Of Polypropylene Based Composites." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609878/index.pdf.

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In the first part of this dissertation, poly(methylsilyne) was produced both in small and large-scales. In the small-scale, the aim was to synthesize the polymer by electrochemical polymerization of methyltrichlorosilane at a constant potential of -6 V supplied by batteries, using sodium dodecyl sulfate (SDS) as the supporting electrolyte. The polymer was characterized by 1H-NMR, FTIR, UV-Visible Spectroscopy and GPC in addition to its distinctive yellow color. The yellow color and the 1H-NMR, FTIR, UV-Visible and GPC results proved that poly(methylsilyne) was produced successfully in small-sc

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18

Unsal, Gungor Elif Mufide. "The Effect Of Potassium Hydroxide On The Polymerization Of Trichlorophenol, Pyrrole And Thiophene By Microwave Initiation." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609670/index.pdf.

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The synthesis of black conducting polymer (CP) and/or crosslinked polymers (CLP) and/or radical ion polymer (RIP) and/or white polymers (WP) and/or orange polymer (OP) were achieved by using KOH with TCP, pyrrole and thiophene via microwave energy in a very short time interval. Polymerizations were carried out by constant microwave energy with different time intervals varying from 1 to 25 min<br>or at constant time intervals with variation of microwave energy from 90 to 900 watt<br>or varying the water content from 0, 0.5 to 5 ml at constant time intervals and microwave energy, or at constant

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19

Yigitsoy, Basak. "Benzyl Functionalized Benzotriazole Containing Conjugated Polymers: Effect Of Substituent Position On Electrochromic Properties And Synthesis Of Crown Ether Functionalized Electrochromic Polymers." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613309/index.pdf.

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A new class of &pi<br>-conjugated monomers was synthesized with combination of electron donating and electron-withdrawing heterocyclics to understand the effects of structural differences on electrochemical and optoelectronic properties of the resulting polymers. Electron deficient benzotriazole, substititued with benzyl from two available sites, coupled with stannylated electron donating groups, ethylenedioxythiophene (EDOT) and thiophene (Th), to yield four different monomers<br>1-benzyl-4,7-di(thiophen-2-yl))-2H-benzo[d][1,2,3] triazole (BBTA), 2-benzyl-4,7-di(thiophen-2-yl))-2H-benzo[d][1,

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20

Barthet, Cécile. "Effect of the microstructure on the physico-chemical properties of multiblock associative polymers synthesized via RAFT/MADIX micellar polymerization." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30385.

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Depuis le milieu du 20ème siècle, les techniques de récupération assistée du pétrole (RAP) ont été beaucoup utilisées afin d’améliorer le rendement d’extraction du pétrole brut. Des polyacrylamides modifiés hydrophobiquement ont montré des propriétés intéressantes en tant que modificateurs de rhéologie en vue d’une application en RAP. Cependant, la synthèse de polymères hydrosolubles comportant des segments hydrophobes le long de la chaîne est un défi puisque les monomères hydrophiles et hydrophobes sont rarement miscibles dans le même solvant. Le but de cette thèse a été de développer des cop

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21

Liu, Ning. "Effect of radiation on polymerization, microstructure, and microbiological properties of whey protein in model system and whey protein based tissue adhesive development." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/521.

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Whey proteins are mainly a group of small globular proteins. Their structures can be modified by physical, chemical and other means to improve their functionality. The objectives of this study were to investigate the effect of radiation on protein-protein interaction, microstructure, and microbiological properties of whey protein-water solutions. Whey protein isolate (WPI) solutions (27-36% protein) were treated with different dosages (10-35 KGy) of gamma radiation. The protein solutions were analyzed for viscosity, turbidity, soluble nitrogen, total plate count, and yeast and mold counts. The

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22

Beyers, Cornelis Petrus. "The effect of iodo alkyl chain transfer agents on the seeded emulsion homo- and co-polimerisation of styrene and butyl acrylate." Thesis, Stellenbosch : Stellenbosch University, 1999. http://hdl.handle.net/10019.1/51467.

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Thesis (MSc) -- Stellenbosch University, 1999.<br>ENGLISH ABSTRACT: A free-radical polymerisation process, which has characteristics of a living polymerisation system, as it is capable of producing polymers of pre-determined molecular masses with a narrow molecular mass distribution, is discussed. It is also possible to make blockcopolymers by adding adding different monomers. The basic objective was to describe, discuss and explain the results of the effects of alkyl iodides as chain transfer agents on the seeded emulsion homo- and co-polymerisation of styrene and butyl acrylate. lodoa

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23

Woody, Kathy Beckner. "Design, synthesis and characterization of self-assembling conjugated polymers for use in organic electronic applications." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43627.

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Conjugated polymers comprise some of the most promising materials for new technologies such as organic field effect transistors, solar light harvesting technology and sensing devices. In spite of tremendous research initiatives in materials chemistry, the potential to optimize device performance and develop new technologies is remarkable. Understanding relationships between the structure of conjugated polymers and their electronic properties is critical to improving device performance. The design and synthesis of new materials which self-organize into ordered nanostructures creates opportuniti

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24

Oesterle, Matthew John. "Silver ion and solvent effects on polystyrene photochemistry." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/27565.

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25

Hongbo, Li. "The effect of interfacial tension in CO₂ assisted polymer processing." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1087479703.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xv, 145 p. : ill. (some col.). Advisors: David L. Tomasko and L. James Lee, Dept. of Chemical Engineering. Includes bibliographical references (p. 135-145).

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26

Powers, Gerald W. "The effect of temperature on the solvent removal from solution-cast thin polymer films." Ohio : Ohio University, 1988. http://www.ohiolink.edu/etd/view.cgi?ohiou1182868409.

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27

Zhang, Zimo. "Effect Of Chain End Functional And Chain Architecture On Surface Segregation." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1498513871263316.

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28

Wang, Xiujun. "Melt transformation coextrusion of polyethylene and polybutylene measurements of streamline flow and pressure effect on birefringence and interface visualization in the MTCE process." Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182182580.

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29

Eyenga, Imona Ilanga. "Effect of various additives on the UV stability of polyethylene and polypropylene films." Diss., 2002. http://hdl.handle.net/2263/26892.

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30

Liu, Chien-Kuo, and 劉建國. "The effect of gamma ray radiation on the physical properties of polymers and their mechanical properties." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/58670835740404240425.

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31

Han, Hui-An, and 韓蕙安. "Development of Pyridyl-Imine Ligand Used in Atom Transfer Radical Polymerization and The Structural Effect to Fluorescent Intensity of Dye-labeled Polymers." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/65786136283784015495.

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碩士<br>國立清華大學<br>化學系<br>102<br>Pyridyl-imine copper complex, CuII(paenMe2)Br2, was used to mediate the normal and AGET (Activators generated by electron transfer) ATRP of methyl methacrylate. The different initiators, ratios of ligand and the lengths of copper wires were tuned. The polymeric products showed a low polydispersity (Mw/Mn = 1.14 ~ 1.18) and the molecular weight matched the theoretical values. Besides, the pyrene-labeled polymers with structure of linear, star and network were synthesized by AGET ATRP. Observing the fluorescent intensity changes of polymers by PL, we found the f

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32

Shaabin, Maram 1979. "The effect of inhibitor and initiator concentration on degree of conversion, flexural strength and polymerization shrinkage stress on resin-matrix composite." Thesis, 2009. http://hdl.handle.net/1805/2113.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Polymerization shrinkage is one of the most significant problems associated with resin-matrix composite. Shrinkage results in contraction stress in the resin, leading to possible debonding in certain areas of the adhesive joint and potentially adversely affecting the bond strength. The reduction in the stress may improve the adaptation of the resin restoration, and decrease the problems that are associated with contraction stress, such as postoperative pain and recurrent caries. Recently, it has been found that varying the inhibitor

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33

Ridha, Hashem M. 1977. "The effect of using variable curing light types and intensities on the parameters of a mathematical model that predicts the depth of cure of light- activated dental composites." Thesis, 2009. http://hdl.handle.net/1805/2082.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>The purpose of this study is to further investigate the effect of using six different light source types with different light output intensities on the parameters of a mathematical model that predicts the DOC in VLDC’s. In this equation: D = Dp In(E0/Ec), D is the depth of cure in millimeters, E is the curing energy in J/cm2, Ec is the critical curing energy for the composite to reach a gel layer, and Dp is a characteristic coefficient. Three LED and three halogen dental curing units with different light output intensities were

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34

Shih, Han. "Step-growth thiol-ene photopolymerization to form degradable, cytocompatible and multi-structural hydrogels." Thesis, 2014. http://hdl.handle.net/1805/3842.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Hydrogels prepared from photopolymerization have been used for a variety of tissue engineering and controlled release applications. Polymeric biomaterials with high cytocompatibility, versatile degradation behaviors, and diverse material properties are particularly useful in studying cell fate processes. In recent years, step-growth thiol-ene photochemistry has been utilized to form cytocompatible hydrogels for tissue engineering applications. This radical-mediated gelation scheme utilizes norbornene functionalized multi-arm poly(eth

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