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Dissertations / Theses on the topic 'Ethyne; Propyne'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Middleton, Ruth Linda. "Alkyne coupling on copper and copper/palladium single crystal surfaces." Thesis, University of Cambridge, 1998. https://www.repository.cam.ac.uk/handle/1810/272595.

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2

Hoza, Adam. "Vliv přídavku ethenu na aktivitu Z-N katalyzátoru pro nízkotlakou polymeraci propenu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-216658.

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The aim of the study will be the determination of the kinetic profiles of the polymerization of propene, ethene and their mixtures with commercial Ziegler-Natta catalyst by application of two different experimental procedures. The prepared polymer material will be utilized for the SEC analysis and subsequent evaluation of the concentration of active sites. The determined molecular mass distribution curves will be further investigated by the application of the procedure, which deconvolute the overall profile on the basic Flory's distribution functions. Then the comprehensive study about charact

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3

Mazoyer, Etienne. "Nouvelle génération de catalyseurs a base de tungstène supporté sur oxydes pour la production du propylène." Thesis, Lyon 1, 2010. http://www.theses.fr/2010LYO10169/document.

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La préparation de nouveaux catalyseurs à base de tungstène par la voie Chimie Organométallique de Surface a été abordée dans cette thèse pour la production du propylène à partir de l'éthylène et/ou de butènes. Deux types de systèmes catalytiques ont été développés. Des hydrures de tungstène supportés, obtenus par réaction de surface entre un complexe de tungstène [W(CtBu)(CH2 tBu)3] et la -alumine suivi d'un traitement sous H2 à 150°C ont été préparés. Les caractérisations par différentes techniques spectroscopiques (IR, RMN solide, Raman et EXAFS) et réactivité stoechiométrique ainsi que le

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4

Mbarawa, M., W. Lee, YW Nam, and SH Chung. "Ethylene propane and ethylene ester synergistic effects on soot formation." R&D Journal of the South African Institution of Mechanical Engineering, 2007. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000860.

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In this study, the synergistic elfects of ethylene-propane and ethylene-dimethyl ester (DME) mirtures on soot formation were investigated experimentully using u coflow dilfusion flame burnen The soot volume fraction, soot particle diameter and number density were measured and compured to the homogenous mixture. Addition of DME and propane to the ethylene fuel increased soot volume fraction in the ethylene flames. The ethylene- propnne has more pronounced synergistic ffict in compsrison to the ethylene-DME flame* This is due to the fact that during the decomposition of propane some methyl radic

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5

Middleman, Keith James. "The adsorption of linear and cyclic alkenes on metal single crystal surfaces." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343713.

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6

Crabb, Eleanor Mary. "An investigation of the oxidative dehydrogenation of ethane and propane." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304514.

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7

Kortsdottir, Katrin. "The Impact of Hydrocarbon and Carbon Oxide Impuritiesin the Hydrogen Feed of a PEM Fuel Cell." Doctoral thesis, KTH, Tillämpad elektrokemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193694.

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The proton exchange membrane fuel cell generates electricity from hydrogen and oxygen (from air) through electrocatalytic reactions in an electrochemical cell. The Pt/C catalyst, commonly used in PEM fuel cells, is very sensitive to impurities that can interact with the active catalyst sites and limit fuel cell performance. Unfortunately, most hydrogen is currently produced from fossil sources, and inevitably contains impurities. The subject of this thesis is the effect of hydrogen impurities on the operation of a PEM fuel cell using a Pt/C anode. The impurities studied are carbon monoxide (CO

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8

Wysocki, Clare L. "Reinforcement of Ethylene Propylene Rubber (EPR) and Ethylene Propylene Diene Rubber (EPDM) by Zinc Dimethacrylate." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145038716.

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9

Dagaut, Philippe. "Etude expérimentale et modélisation de l'oxydation de l'éthylène, du propane et du propène en réacteur auto-agité par jets gazeux." Phd thesis, Université Pierre et Marie Curie - Paris VI, 1986. http://tel.archives-ouvertes.fr/tel-00429868.

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L'oxydation de l'éthylène, du propane et du propène a été étudiée dans un large domaine de température (900 à 1200 Kelvin), de pression (0,1 à 1 MPa) et de richesse (0,15 à 4) au moyen d'un réacteur auto-agité par jets gazeux. L'analyse chromatographique d'échantillons du milieu réactionnel permet de suivre la réaction d'oxydation dans son ensemble. Un mécanisme cinétique détaillé comportant 278 réactions et faisant intervenir 47 espèces chimiques, a été développé grâce à l'utilisation d'une technique d'analyse de sensibilité, et permet de modéliser correctement nos résultats expérimentaux.

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10

Xu, Liren. "Carbon molecular sieve hollow fiber membranes for olefin/paraffin separations." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50130.

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Olefin/paraffin separation is a large potential market for membrane applications. Carbon molecular sieve membranes (CMS) are promising for this application due to the intrinsically high separation performance and the viability for practical scale-up. Intrinsically high separation performance of CMS membranes for olefin/paraffin separations was demonstrated. The translation of intrinsic CMS transport properties into the hollow fiber configuration is considered in detail. Substructure collapse of asymmetric hollow fibers was found during Matrimidﾮ CMS hollow fiber formation. To overcome the perm

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11

Bavarian, Neda. "Investigation of ethylene/propylene and ethylene/propylene/diene polymerization by Cp*TiMe3/B(C6F5)3 catalyst system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0016/MQ52971.pdf.

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12

Velaga, Srinath Chowdary. "Stability of Methane-Ethane-Propane Mixed Gas Hydrates under Deep Water Conditions." Thesis, West Virginia University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3618152.

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<p> Methane hydrates are globally distributed in sediments along the continental margins and potentially contain more energy than all fossil fuel reserves. However, methane is also a potential greenhouse gas which could play a major role in global climate change. Understanding the stability of gas hydrates can help us to understand their role in the climate change. Three main factors affect the stability of hydrates: Temperature (<i>T</i>), Pressure (<i>P</i>) and composition. Hydrates become unstable when they are exposed to pressures and temperatures outside the hydrate stability zone (HSZ)

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13

Gaudet, Jason. "Gas-Phase Epoxidation of Ethylene and Propylene." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/29341.

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Catalysts consisting of silver on Î±-Al2O3, Î±-SiC, and Î²-SiC supports were synthesized and tested for catalytic performance in the gas-phase direct oxidation of ethylene to ethylene oxide. For this study, which used no promoters, ethylene oxidation selectivity of SiC-supported catalysts ranged from 10 to 60% and conversion from 0-4.5%. Silicon carbide supported catalysts exhibited poor performance except for a surface-modified Î²-SiC-supported catalyst, which demonstrated conversion and selectivity similar to that of an Î±-Al2O3-supported catalyst. This Ag/Î²-SiC catalyst was further inve

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14

Sousa, Zilacleide da Silva Barros. "Transformação de metanol em olefinas leves catalisada por zeólitas HZSM-5." Universidade do Estado do Rio de Janeiro, 2007. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=3225.

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A reação de transformação de MeOH em olefinas leves foi investigada sobre zeólitas HZSM-5 com razões SiO2/Al2O3 (SAR) iguais a 30, 80 e 280. As propriedades ácidas e texturais da amostra com SAR 30 foram modificadas por impregnação com ácido fosfórico. A caracterização físico-química das amostras foi realizada empregando-se as técnicas de FRX, fisissorção de N2, DRX, DTP de NH3 e IV com adsorção de piridina. O desempenho catalítico das mesmas foi comparado tanto em condições reacionais similares (mesma T, pressão parcial de MeOH e WHSV) como em condições de isoconversão. Verificou-se, que quan

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15

Jawad, Shadwan Hamid. "Thermal conductivity of polyatomic gases." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367922.

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16

Hung, Jocelyn. "Effects of propane or ethane additives on laminar burning velocity of methane-air mixtures." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26297.

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Laminar burning velocities of stoichiometric methane-air, ethane-air, propane-air as well as methane with propane and ethane additives have been determined from pressure-time records during combustion in a constant-volume spherical combustion bomb with central ignition. Additives up to 20 volume percent were used. Initial pressure ranged from 1 to 8 atm. Results show that these additives increase the burning velocity of methane-air by an amount depending on the concentration and initial pressure. Ethane appeared to be more effective than propane for the same volume percent. Two analytical met

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17

Keen, A. "Elementary reactions involved in the oxidation of ethylene oxide and propene." Thesis, University of Hull, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381889.

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18

Mange, Siyabonga. "Structure-property relationships in poly-(propylene-ethylene) copolymers." Master's thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/19804.

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This thesis examines the relationship between the microstructural and the mechanical properties of poly-(propylene-ethylene) bi-phasic copolymers. The copolymers investigated covered a comonomer content ranging between 4 and 23 percent ethylene. Nine grades were considered, with variables such as the melt flow index, the degree of crystallinity, the molecular weight distribution and the effect of a nucleating agent being examined. These copolymers have been characterised in order to gain a better understanding of the interrelationship between the morphological structure and their physical, mec

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19

Joubert, D. J. (Dawid Johannes). "Ethylene and propylene copolymers utilizing Fishcer-Tropsch 1-olefins." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51747.

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Thesis (PhD)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: From the Sasol Fischer- Tropsch process, a variety of different a-olefins are produced. Sasol recently started presenting these a-olefins to polymer producers. To demonstrate the application possibilities of these a-olefins as comonomers for ethylene and propylene polymerization, it was necessary to first synthesize catalysts having a combination of high activity and good comonomer incorporation, and in the case of propylene copolymers, also sufficient stereospecificities. Different methods to produce catalysts conforming

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20

Harding, Gareth. "The fractionation and characterisation of propylene-ethylene random copolymers." Thesis, Link to online version, 2005. http://hdl.handle.net/10019/1040.

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21

Channell, Brent T. "Evaluation and selection of an efficient fuel/air initiation strategy for pulse detonation engines." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FChannell.pdf.

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Thesis (M.S. in Astronautical Engineering)--Naval Postgraduate School, September 2005.<br>Thesis Advisor(s): Christopher M. Brophy. Includes bibliographical references (p. 53-54). Also available online.

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22

鄭旭明 and Xuming Zheng. "Resonance Raman intensity analysis studies of bond selective electronic excitation in 1,2-dihaloethanes and conformational effectson the A-band short-time photodissociation dynamics of 1-iodopropane,iodocyclohexane and iodocyclopentane." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B29913433.

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23

Zheng, Xuming. "Resonance Raman intensity analysis studies of bond selective electronic excitation in 1,2-dihaloethanes and conformational effects on the A-band short-time photodissociation dynamics of 1-iodopropane, iodocyclohexane and iodocyclopentane /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21929440.

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24

Arrowsmith, David. "Homopolymerisation von Propen und EP(D)M-Herstellung mit geträgerten Metallocenen im gerührten Bettreaktor." [S.l. : s.n.], 2000. http://www.sub.uni-hamburg.de/disse/409/Disse.pdf.

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25

Kili, Tando. "The Synthesis and Characterisation of Fluorinated Ethylene Propylene (FEP) Copolymers." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/46241.

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This work details research on the semi-continuous copolymerisation of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP) in aqueous medium using different monomer ratios. A main objective of this dissertation was to understand the influence of changing parameters, such as monomer feed ratio and initiator concentration, on the properties of the polymer. The copolymerisation of TFE and HFP was carried out in ultra-pure water using a 300 mL Parr 316 stainless steel high-pressure reactor. The experiments were done at 85 and 100 °C with pressures in the range of 11 - 20 bar using ammonium pers

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26

Uan-Zo-li, Julie Tammy. "Morphology, Crystallization and Melting Behavior of Propylene-Ethylene Statistical Copolymers." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29143.

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In this work the morphology, crystallization and melting behavior of novel Dow Chemical propylene-ethylene copolymers were investigated. The incorporation of ethylene units into a polypropylene chain resulted in the decrease in crystallization, melting and glass transition temperatures and overall crystallinity. Based on the shape of heat capacity curves and the dependence of the melting temperature offset on ethylene content, it was concluded that copolymers prepared using different catalyst systems exhibited different ethylene sequence length distributions. The behavior of Dow Chemical pro

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27

Estrera, Susana Santos. "Multiphase equilibria thermodynamics in prototype rich gas + hydrocarbon mixtures /." Access abstract and link to full text, 1987. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8801650.

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28

Kane-Diallo, Ousseynou. "Analyse morphologique des champs de cavités dans un élastomère sous décompression d'hydrogène : Influence des conditions de décompression et effets d'interaction." Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2015. http://www.theses.fr/2015ESMA0014/document.

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La morphologie de l’endommagement par cavitation est analysée dans un EPDM non chargé sous différentes conditions de décompression d’hydrogène. Les expériences permettent devisualiser l’évolution de l’endommagement au cours du temps. Les images obtenues sont traitées pour obtenir l’instant d’apparition, le nombre et la distribution de taille des cavités au cours du temps. Elles permettent également de suivre les cinétiques de croissance / décroissance des plus grosses cavités. Le tracé de covariogrammes permet de quantifier la distribution spatiale de ces cavités. L’analyse de cet ensemble de

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29

Batistini, Antonio. "Copolymers of carbon monoxide with ethylene and propylene : synthesis and characterization /." [S.l.] : [s.n.], 1994. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10641.

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30

Wan, Hussin Dennis [Verfasser], and Yvonne [Akademischer Betreuer] Traa. "Dehydroalkylation of benzene with mixtures of ethane and propane over zeolite catalysts / Dennis Wan Hussin ; Betreuer: Yvonne Traa." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2018. http://d-nb.info/1166141241/34.

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31

Bellam, Balaji Anand. "Effect of e-beam sterilization on polypropylene/ethylene propylene diene monomer and ethylene vinyl acetate thermoplastic elastomer." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52484/.

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Thermoplastic elastomer is one of the priority polymeric compound identified for promotion and further development, given the growing demand for a number of commercial industries such as automobile, construction, footwear, healthcare, medical and food packaging sectors. In this study polypropylene (PP)/ethylene propylene diene monomer (EPDM) based thermoplastic elastomers are preferred for improving their properties as it can serve as a good replacement for PP or EPDM material, bridging the gap between thermoset and thermoplastic materials. This study focuses to develop PP/EPDM which can resis

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32

Hopf, Andreas. "Homo- und Copolymerisation von Propen-Ethen mit CS-symmetrischen Metallocen-MAO-Katalysatoren." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965224686.

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33

Liu, Chang. "The spectroscopic and structural characterization of chlorine modification of MoOx catalysts supported over silica/titania mixed oxides for the oxidative dehydrogenation of ethane and propane." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1095645498.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xiv, 157 p.; also includes graphics. Includes bibliographical references (p. 145-153).

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34

Fellah, Mehmet Ferdi. "A Density Functional Theory Study Of Catalytic Epoxidation Of Ethylene And Propylene." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611228/index.pdf.

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The reactions which give the products ethylene oxide, vinyl alcohol, vinyl aldehyde and vinyl radical for ethylene oxidation and the reactions which give propylene oxide, propanal, acetone and pi-allyl radical for propylene oxidation were investigated by using Density Functional Theory (DFT) method with B3LYP/LanL2DZ and 6-31g(d,p) basis sets in Gaussian&rsquo<br>03 software. Silver and silver oxide were used as catalyst surface cluster models. Surface comparison was made for silver (111), (110) and (100) surfaces. Ethylene oxidation reaction was studied on these silver surfaces. Oxygen effect

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35

O'Neil, Conlin. "Novel applications of poly(ethylene glycol)-bl-poly(propylene sulfide) block copolymers /." [S.l.] : [s.n.], 2008. http://library.epfl.ch/theses/?nr=4200.

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36

Doshev, Petar [Verfasser]. "Design and Structure-Property Relationship of Heterophasic Ethylene-Propylene Copolymers / Petar Doshev." Aachen : Shaker, 2006. http://d-nb.info/1166513777/34.

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37

Fratini, Christopher M. "Study of the Morphology and Optical Properties of Propylene/Ethylene Copolymer Films." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27211.

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The development of a new catalyst system by The Dow Chemical Company has resulted in the production of isotactic polypropylene and propylene/ethylene copolymers with a unique defect and comonomer distribution. This work investigated the morphology and optical properties of cast and compression molded films made from the homopolymer and copolymers with up to 20 mol% ethylene comonomer. The defect distribution of the Dow Chemical copolymers resulted in materials with lower crystallinity than Ziegler-Natta or metallocene-made materials of similar ethylene content. These materials exhibited a gamm

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38

Zhou, Qianqian. "Pure Component Adsorption of Methane, Ethylene, Propylene and Carbon Dioxide in Silicalite." Cleveland State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=csu1369150380.

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39

Devant, Ludovic. "Etude des mécanismes de vieillissement d'un caoutchouc EPDM (Ethylène Propylène Diene Monomer)." Thesis, Orléans, 2011. http://www.theses.fr/2011ORLE2067.

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Ce travail de thèse est consacré à l’étude du vieillissement UV d’un caoutchouc EPDM (éthylène propylène diène monomère) avec une attention spéciale sur les additifs du système de vulcanisation. Pour cela nous avons utilisé des techniques particulièrement adaptées à l’analyse de surface telles que le ToF-SIMS, l’XPS, l’ATR-FTIR, le MEB-EDX et l’AFM. Dans un premier temps nous avons pu déterminer la composition chimique de la surface du caoutchouc EPDM vulcanisé à l’état initial. Nous avons pu identifier les sous-produits de vulcanisation et déterminer de manière qualitative leur répartition en

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40

Nqakala, Loyiso Clemence. "Hydrothermal synthesis of hierarchical ZSM-5 with different Si/Al ratio and their evaluation as catalysts in the catalytic cracking of hexane." University of Western Cape, 2021. http://hdl.handle.net/11394/8316.

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>Magister Scientiae - MSc<br>Ethylene and propylene are greatly used for their importance as feedstocks for producing useful materials. Due to rise in prices and the demand of ethylene and propylene, the need to increase the selective production of these light olefins is necessary. To achieve this, zeolites, specifically ZSM-5 has been used to investigate catalytic cracking of several types of hydrocarbons for the production of these light olefins. This study focuses on developing hierarchical macro and/or mesoporous ZSM-5 zeolites with variable Si/Al ratios. The synthesized materials were the

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41

Perry, Guenevere Diane. "Enhancing the Expression of Enzymes Used to Degrade Hydrocarbons and Cyanohydrins in Rhodococcus sp. DAP 96253 by Using Inducers such as Cobalt, Urea, and Propylene Gas; Also Enhances the Ability of the Bacteria to Delay the Ripening of Several Fruit Species." Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/biology_diss/102.

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ABSTRACT Recent studies have shown that R. rhodochrous DAP 96253 has the ability to delay the ripening of many climacteric fruit, by potentially degrading volatile compounds released by plant cells during the ripening process. Rhodococcus rhodochrous DAP 96253 cells were cultured on YEMEA medium supplemented with inducers, (16mM cobalt and 125mM urea), that over-expressed nitrile hydratase (NHase) and amidase (AMDase) enzymes. Cells were cultured on propylene/ ethylene as sole carbon source to induce alkene monooxygenase (AMO) like activity. Induced R. rhodochrous DAP 96253 cells displayed an

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42

Zirkel, Larissa [Verfasser]. "Untersuchungen zum Schäumverhalten von fluorierten Ethylen-Propylen-Copolymeren mit unterschiedlichem molekularen Aufbau / Larissa Zirkel." Aachen : Shaker, 2010. http://d-nb.info/1104047497/34.

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43

Petkovska, Violeta Ilieva. "Mass spectrometry characterization of acyclic diene metathesis polymers and ethylene oxide/propylene oxide copolymers." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0013037.

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44

Hurcom, Jamie. "Probing the behaviour of poly(ethylene oxide) : poly(propylene oxide)-poly(ethylene oxide) surfactants in the formation of hydrophilic polyurethane foam." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/73463/.

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Polyurethane (PU) foams are widely used in the medical industry in the treatment of chronic wounds but the role of surfactants in the reaction process, which strongly influences foam structure and properties, is not well understood. In this research, a homologous series of non-ionic poly(ethylene oxide)-poly(propylene oxide)- poly(ethylene oxide) (Pluronic) block copolymer surfactants were studied, in order to elucidate the influence of surfactant structure on PU foam performance. The behaviour of aqueous surfactant stabilised foams was investigated using a combination of surface science techn

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45

Wickramarachchi, Priyangika Ariyasinghe Wickramasinghe M. "Total electron scattering cross sections of ethane, propane, n-butane, 1,3-butadiene and butylene in the energy range 0.3 to 4.0 keV." Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/5000.

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46

Kotani, Tetsuya. "Novel metabolic pathways for microbial oxidation of propane and ethyl t-butyl ether as volatile organic compounds." Kyoto University, 2006. http://hdl.handle.net/2433/136493.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第12559号<br>農博第1578号<br>新制||農||931(附属図書館)<br>学位論文||H18||N4175(農学部図書室)<br>UT51-2006-P19<br>京都大学大学院農学研究科応用生命科学専攻<br>(主査)教授阪井康能, 教授清水昌, 教授喜多恵子<br>学位規則第4条第1項該当

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47

Thompson, Michael Shane. "Enabling Synthesis Toward the Production of Biocompatible Magnetic Nanoparticles With Tailored Surface Properties." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28395.

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Amphiphilic tri- and penta-block copolymers containing a polyurethane central block with pendant carboxylic acid groups flanked by hydroxyl functional polyether tails were synthesized. Our intention was to investigate the activities of these copolymers as dispersants for magnetite nanoparticles in biological media. A benzyl alkoxide initiator was utilized to prepare poly(ethylene oxide) (BzO-PEO-OH), poly(propylene oxide) (BzO-PPO-OH) and poly(ethylene oxide-b-propylene oxide) (poly(BzO-EO-b-PO-OH)) oligomeric tail blocks with varying lengths of PEO and PPO. The oligomers had a hydroxyl gro

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48

Heuer, Björn. "Alternierende Copolymerisation von Ethen und Propen mit C1-symmetrischen Metallocen-MAO-Katalysatoren." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972517812.

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49

Magagula, Sifiso Innocent. "The effect of organic peroxides on the molecular composition of heterophasic ethylene-propylene impact copolymers." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97850.

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Thesis (MSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Heterophasic ethylene-propylene copolymers, also known as impact polypropylene (PP) copolymers (IPCs) or heterophasic copolymers (HECOs), are a unique group of polyolefins produced through the copolymerisation of ethylene and propylene, with the aim of improving the impact properties of the PP homopolymer at low temperatures. Therefore, this polymer comprises of a PP homopolymer matrix with a dispersed rubbery copolymer phase. Due to their unique properties, HECO polymers have become commercially important materials, with a wide

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50

Hoza, Adam. "Effect of Ethylene and Propylene on Performance of Ziegler - Natta Catalyst in Stopped - Flow Polymerization." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-320775.

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Výzkum v této práci byl zaměřen na přípravu a charakterizaci blokových kopolymerů typu polypropylen-blok-poly(propylenu-co-ethylenu) (dále jen PP-blok-EPR). Tyto materiály jsou považovány za účinné kompatibilizátory mezi semi-krystalickou polypropylenovou (PP) matricí a amorfními doménami statistického kopolymeru propylenu a etylenu (EPR) v rázuvzdorném sekvenčním kopolymeru (ICP) a proto byl výzkum zaměřen na zkoumání vlivu přídavku blokového kopolymeru PP-blok-EPR na vlastnosti komerčního ICP. Blokové kopolymery byly připraveny za použití techniky „stopped-flow“. Pro tento účel byla zkonstru

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