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Dissertations / Theses on the topic 'Reversible addition-fragmentation polymerization'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

O'Donnell, Jennifer M. "Reversible addition-fragmentation chain transfer in microemulsion polymerizations." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 218 p, 2007. http://proquest.umi.com/pqdweb?did=1354135141&sid=45&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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McLeary, James Breton. "Reversible addition-fragmentation transfer polymerization in heterogeneous aqueous media." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/53760.

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Thesis (PhD)--Stellenbosch University, 2004.<br>ENGLISH ABSTRACT: The study presented in this dissertation had as primary aim to develop pathways to heterogeneous aqueous polymerizations that had living characteristics. To this end, the reversible addition fragmentation chain transfer (RAFT) process was investigated in predispersed and ab initio emulsions as well as homogeneous media. The synthesis of RAFT agents was carried out. The compounds prepared provided varied behaviour in reaction. In situ IH nuclear magnetic resonance (NMR) increased understanding of homogeneous RAFT mediated p

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3

Calitz, Francois Malan. "Mechanistic studies of reversible addition-fragmentation chain transfer mediated polymerization." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50015.

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Thesis (PhD)--Stellenbosch University, 2004.<br>ENGLISH ABSTRACT: To comply with the ever growing demands for materials with better properties and complex architectures, polymer chemistry has resorted to the use of living free radical polymerization techniques. Despite the structural control some of these techniques offer, major disadvantages do exist. For example, most require ultra-pure reagents, hence only a small fraction of the monomers used in industry can be polymerized in this way. This rendered these new living techniques less advantageous from a commercial point of view. Recentl

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4

Pound, Gwenaelle. "Reversible addition fragmentation chain transfer (RAFT) mediated polymerization of N-vinylpyrrolidone." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/892.

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5

Vosloo, Johannes Jacobus. "Controlled free radical polymerization in miniemulsion using Reversible Addition-Fragmentation Chain Transfer (RAFT)." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52174.

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Thesis (MSc)--Stellenbosch University, 2001.<br>ENGLISH ABSTRACT: A novel approach to conducting controlled free radical polymerization in aqueous systems using Reversible Addition-Fragmentation Chain Transfer (RAFT) has been studied. When conducting RAFT in aqueous systems, reaction conditions must be chosen such that monomer transport across the aqueous-phase is either eliminated or facilitated. This is to prevent the formation of the red layer associated with RAFT in emulsions. The formation of the red layer is ascribed to the inability of waterinsoluble, dithiobenzoate-endcapped oli

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6

Zhang, Junliang. "Controlling polymer microstructure using multiblock copolymers via reversible addition-fragmentation chain transfer polymerization." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/95273/.

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Reversible addition fragmentation chain transfer (RAFT) polymerization is a very versatile way to generate synthetic polymeric materials. Multiblock copolymers have received enormous scientific interest recently due to the ability to mimic the sequence-regulated microstructure of biopolymers. The objective of this thesis was to investigate RAFT polymerization and explore its potential in the synthesis of sequence-controlled multiblock polymeric chains, and their use to tune the micro-structure of the polymers, engineer single chain polymeric nanoparticles, and fabricate functional polymeric na

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7

Yang, Mo. "Synthesis and Characterization of Halatopolymers by Reversible Addition Fragmentation Chain Transfer (RAFT) Polymerization." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1471512556.

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8

Lott, Joseph Robert. "Reversible addition-fragmentation chain-transfer (RAFT) polymerization in grafting polymer chains from TiO₂ nanoparticles /." Online version of thesis, 2006. https://ritdml.rit.edu/dspace/handle/1850/2878.

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9

Schilli, Christine Maria. "Novel precursors for polymer protein conjugate synthesis via reversible addition fragmentation chain transfer polymerization." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968492118.

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10

Altarawneh, Ibrahem. "CONTROL OF KEY POLYMER PROPERTIES VIA REVERSIBLE ADDITION-FRAGMENTATION CHAIN TRANSFER IN EMULSION POLYMERIZATION." University of Sydney, 2009. http://hdl.handle.net/2123/4984.

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Doctor of Philosophy (PhD), Engineerig<br>Free radical emulsion polymerization (FRP) is widely adopted in industry due to its applicability to a wide range of monomers. Despite its many benefits and wide spread use, the fast chain growth and the presence of rapid irreversible termination impose limitations with respect to the degree of control in FRP. Furthermore, producing block copolymers and polymers with complex structures via FRP is not feasible. Closer control of macromolecular chain structure and molar mass, using novel polymerization techniques, is required to synthesize and optimize m

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11

Hodgson, Marcelle. "Emulsion polymerization of styrene in the presence of reversible addition-fragmentation chain transfer agents." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51739.

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Thesis (MSc)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: This work involves the study of the effects of Reversible Addition-Fragmentation Chain Transfer (RAFT) agents on the emulsion polymerization of styrene. The feasibility of RAFT as a method for obtaining controlled radical polymerizations in emulsion systems is also investigated. Both seeded and ab initio systems were studied with three RAFT agents of varying structure. Inhibition and retardation effects on addition of various amounts of the RAFT agents to the emulsion systems were observed and the trends noticed. The effe

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12

Stopler, Erika Brooke. "CARBON NANOTUBE REINFORCED DYNAMIC MATERIALS SYNTHESIZED BY REVERSIBLE ADDITION FRAGMENTATION CHAIN TRANSFER (RAFT) POLYMERIZATION." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1564680997583507.

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13

Jangu, Chainika. "Examining Structure-Morphology-Property Relationships of Novel Styrenic-Based Macromolecules for Emerging Applications." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56558.

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For the first time, triblock copolymers of novel styrenic-based macromolecules were investigated in detail and examined for structure-morphology-performance relationships. We were able to design novel imidazolium- and phosphonium-containing styrenic macromolecules using controlled radical polymerization and conventional free radical polymerization strategies, for a variety of potential applications including electromechanical devices, ionic liquids, adhesives, and lithium-ion batteries. Block copolymers have a unique architecture providing physical crosslinking to behave as thermoplastic elast

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14

Rodrigues, Guimarães Thiago. "Synthesis of magnetic polymer latex particles by reversible addition-fragmentation chain transfer (RAFT) polymerization in aqueous dispersed media." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1107/document.

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Dans le cadre de ce travail de thèse, la polymérisation de type RAFT a été exploitée pour synthétiser des particules de latex magnétiques décorées de polymères stimulables. Cinq (co)polymères hydrophiles ont tout d'abord été préparés via la (co)polymérisation RAFT en solution d'acide acrylique (AA) et de méthacrylate de 2-diméthylaminoéthyle (MADAME). Les agents macromoléculaires obtenus (macroRAFT) : des homopolymères de PAA ou PMADAME ainsi que des copolymères P(AA-co-MADAME), présentent une sensibilité au pH et à la température. Ces macroRAFT hydrophiles ont ensuite été utilisés dans des ré

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15

Song, Wentao Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "UV initiated reversible addition fragmentation chain transfer polymerization of N-isopropylacrylamide and acrylic acid in aqueous solution at ambient temperature." Awarded by:University of New South Wales. Chemical Sciences & Engineering, 2008. http://handle.unsw.edu.au/1959.4/39170.

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It was demonstrated for the first time that RAFT polymerizations of NIPAAm can be carried out directly in water at room temperature without photo initiator under UV radiation. Under these conditions, the controlled/living features could be proven for a large range of monomer/RAFT agent ratios. Moreover, even at a monomer conversion exceeding 80%, polymerization control (PDI<1.2) is maintained. It is also demonstrated that the RAFT polymerization of AA can be carried out without photo initiator in water at ambient temperature in the presence of TRITT at short wavelength. At these wavelengths, t

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16

Heidenreich, Andrew J. "Synthesis and Characterization of Arborescent (Dendritic) Polystyrenes Prepared by Raft Polymerization." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1310763577.

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17

Mertoglu, Murat. "The synthesis of well-defined functional homo- and block copolymers in aqueous media via Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization." Phd thesis, Universität Potsdam, 2004. http://opus.kobv.de/ubp/volltexte/2005/233/.

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New chain transfer agents based on dithiobenzoate and trithiocarbonate for free radical polymerization via Reversible Addition-Fragmentation chain Transfer (RAFT) were synthesized. The new compounds bear permanently hydrophilic sulfonate moieties which provide solubility in water independent of the pH. One of them bears a fluorophore, enabling unsymmetrical double end group labelling as well as the preparation of fluorescent labeled polymers. Their stability against hydrolysis in water was studied, and compared with the most frequently employed water-soluble RAFT agent 4-cyano-4-thiobenzoylsul

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18

Mertoğlu, Murat. "The synthesis of well defined functional homo- and block copolymers in aqueous media via Reversible Addition Fragmentation Chain Transfer (RAFT) Polymerization." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974309133.

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19

Feng, Lei. "Synthesis and Characterization of Ionically Bonded Diblock Copolymers." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1385331107.

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20

Saetung, Nitinart. "Synthetic- and natural rubber-based telechelic polyisoprenes : preparation and use for block copolymers via RAFT polymerization." Le Mans, 2010. http://cyberdoc.univ-lemans.fr/theses/2010/2010LEMA1025.pdf.

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La synthèse de copolymères à blocs de structure bien définie par procédé RAFT, à partir de polyisoprène téléchélique issu du caoutchouc naturel a été étudiée. Deux voies synthétiques originales ont été développées pour obtenir des oligoisoprènes issus du caoutchouc naturels employés ensuite comme agents de transferts de chaîne (macroCTAs) pour la polymérisation RAFT de l’acrylate de tert-butyle. Dans la première approche, un cis-1,4-polyisoprène téléchélique porteur d’une fonction trithiocarbonate a été synthétisé par dégradation oxydante du caoutchouc naturel suivie d’une amination réductrice

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21

Klumperman, Bert. "NMR studies of radical polymerization processes." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71596.

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Thesis (DSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Examples of the use of NMR spectroscopy in the study of radical polymerization processes have been described. The studies presented have made a significant contribution to the understanding of the fundamental mechanistic processes in these polymerization systems. It is pointed out that NMR in conventional radical polymerization is of limited use due to the concurrent occurrence of all elementary reactions (initiation, propagation and termination). Conversely, for

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22

Sidi, Zhao. "Synthesis, Characterization and High-throughput Screening of Photoiniferter/RAFT Agent for Well-controlled Radical Polymerization of Block Copolymers." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555435272696644.

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23

Catli, Candan. "Novel synthetic approaches for fabrication of polymer brushes on gold surfaces via Raft polymerization: A new era for gold modification." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://hdl.handle.net/11858/00-1735-0000-002E-E353-2.

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24

Cheng, Shijing. "Synthesis and Characterization of Cation-Containing and Hydrogen Bonding Supramolecular Polymers." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77185.

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Non-covalent interactions including nucleobase hydrogen bonding and phosphonium/ammonium ionic aggregation were studied in block and random polymers synthesized using controlled radical polymerization techniques such as nitroxide mediated polymerization (NMP) and reversible addition-fragmentation chain transfer polymerization (RAFT). Non-covalent interactions were expected to increase the effective molecular weight of the polymeric precursors through intermolecular associations and to induce microphase separation. The influence of non-covalent association on the structure/property relationship

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25

Forero, Ramirez Laura Marcela. "Élaboration de nanocapsules par polymérisation radicalaire contrôlée à partir d’un tensioactif réactif dérivé du dextrane." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0086/document.

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Des nanocapsules (NCs) biocompatibles destinées à l’administration intraveineuse d’agents anticancéreux hydrophobes ont été élaborées par polymérisation RAFT en miniémulsion, confinée à l’interface liquide/liquide. La polymérisation RAFT a été utilisée pour contrôler la croissance des greffons polymères constituant l’écorce des NCs à partir d’un transurf (macroagent RAFT et tensioactif) multifonctionnel dérivé du dextrane (DexN3-τCTAγ). Des NCs constituées d’une écorce en polymère hydrophobe (poly(méthacrylate de méthyle)) entourant un cœur liquide huileux (Miglyol®810) et recouvertes d’une co

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26

Pray-In, Yingrak. "Azlactome funchionalization of magnetic nanoparticles using CRP techniques and their bioconjugation." Thesis, Le Mans, 2014. http://www.theses.fr/2014LEMA1037/document.

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Ce travail concerne la modification de surface de nanoparticules magnétiques (MNP) par des copolymères réactifs renfermant des cycles azlactone, aux fins de l’élaboration de nano-supports destinés à l’immobilisation de biomolécules. Trois stratégies basées sur des techniques de polymérisation radicalaire contrôlée ont été mises en œuvre.Dans la première, un copolymère poly(méthacrylate de poly(éthylène glycol)-stat-2-vinyl-4,4-diméthylazlactone) (poly(PEGMA-stat-VDM)) a été préparé par polymérisation radicalaire par transfert d’atome (ATRP) selon la technique « grafting from » à partir des MNP

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27

Griveau, Lucie. "Emulsion polymerization in the presence of reactive PEG-based hydrophilic chains for the design of latex particles promoting interactions with cellulose derivatives." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1329/document.

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Dans cette thèse, des particules de polymère fonctionnalisées en surface avec des groupes poly (éthylène glycol) (PEG) ont été synthétisées pour favoriser leur interaction avec les dérivés cellulosique via liaisons hydrogène intermoléculaires. Deux voies de synthèse ont été proposées pour obtenir ses composites cellulose/latex.La première voie est basée sur l'auto-assemblage induit par polymérisation (PISA) pour former des nanoparticules fonctionnalisées avant leur adsorption sur un substrat cellulosique. La PISA tire profit de la formation de copolymères blocs amphiphiles dans l'eau en combin

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Le, Dao. "Synthèse, caractérisation et polymérisation par ouverture de cycle par métathèse de macromonomères cyclobuténiques obtenus par chimie " click " et polymérisation RAFT." Phd thesis, Université du Maine, 2012. http://tel.archives-ouvertes.fr/tel-00743217.

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Ce travail de thèse porte sur la synthèse de copolymères greffés à squelette 1,4-polybutadiène (PBu) et polyoxanorbornène par combinaison de ROMP et chimie click et/ou polymérisation RAFT selon la méthode grafting through. Une gamme de macromonomères symétriques et non symétriques originaux poly(oxyde d'éthylène) (POE), poly(acrylate d'éthyle), poly(acrylamide de N-isopropyle) (PNIPAM) et POE-b-PNIPAM ont été synthétisés à partir de précurseurs oxanorbornène et cyclobutène fonctionnalisés présentant un ou deux groupements clickables et/ou un agent RAFT par chimie click et polymérisation RAFT.

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Nyström, Andreas. "Dendrimers and dendronized polymers : synthesis and characterization." Doctoral thesis, KTH, Fiber- och polymerteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3970.

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The goal of this work was to synthesize complex macromolecular architectures such as dendrimers and dendronized polymers, and evaluate the effect from the dendrons on the optical and material properties. The work presented in this doctoral thesis, Dendrimers and Dendronized Polymers - Synthesis and Characterization, is divided into one minor and one major part. The first part deals with the synthesis and characterization of two sets of dendritic porphyrins based on 2,2-bis(methylol)propionic acid (bis-MPA). The second part deals with the synthesis and characterization of dendronized poly(hydro

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30

Fuentes-Exposito, Mathieu. "Synthèse de latex de poly(fluorure de vinylidène) (PVDF) sans tensioactif à l’aide de la polymérisation radicalaire contrôlée de type RAFT." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1175.

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Les travaux réalisés portent sur la synthèse de nanoparticules de PVDF à l’aide de la polymérisation radicalaire contrôlée (PRC) par transfert de chaîne réversible par addition-fragmentation (RAFT) en émulsion. Dans un premier temps, un méthoxy poly(éthylène glycol) commercial porteur d’une fonction hydroxyle (PEG-OH) a été employé pour la stabilisation des particules de PVDF. Cette stabilisation est assurée par des réactions de transfert irréversible opérant le long des chaînes de PEG conduisant à la formation in situ d’un stabilisant de type copolymère greffé. Par la suite, un PEG modifié ch

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31

Bouharras, Fatima Ezzahra. "Développement de nanocomposites BaTiO3 @ polymères fluorés pour les matériaux diélectriques et comme liant de cathode dans les batteries lithium Core shell structured Poly(Vinylidene Fluoride) -grafted- BaTiO3 nanocomposites prepared via Reversible Addition-fragmentation chain transfer (RAFT) polymerization of VDF for high energy storage capacitors Recent Progress on Core-Shell Structured BaTiO3/Fluorinated Polymers Nanocomposites for High Energy Storage: Synthesis, Dielectric properties and Applications." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2020. http://www.theses.fr/2020ENCM0002.

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Les matériaux nanocomposites présentent des propriétés physico-chimiques uniques qui ne peuvent être obtenues en utilisant un seul composant. Ainsi, l'amélioration des propriétés de ces matériaux a suscité un intérêt majeur dans différents domaines. Les matériaux nanocomposites diélectriques à haute densité d'énergie présentent des performances prometteuses pour les applications de stockage d'énergie. Des efforts importants ont été menés pour combiner la constante diélectrique élevée de la céramique avec la flexibilité et la facilité de mise en œuvre des polymères. Ainsi, cette thèse porte sur

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32

Li, Binxin. "Synthesis and Characterization of Dye-labeled Copolymers by Reversible Addition-fragmentation Transfer (RAFT) Polymerization." Thesis, 2008. http://hdl.handle.net/1807/17194.

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Copolymers of N-(2-hydroxypropyl)methacrylamide (HPMA) and N-hydroxysuccinimide methacrylate (NMS) were synthesized by reversible addition-fragmentation transfer (RAFT) polymerization using a semi-batch method. The copolymers were prepared in a wide range of molecular weights (Mn= 4,200-14,000 g/mol) with narrow polydispersities (1.2-1.4). A new approach was developed to prepare a modified RAFT chain transfer agent, a naphthalimide-dyelabeled dithiobenzoate. It was used to prepare a naphthalimide-dye end-labeled poly(HPMA-co-NMS). The copolymer was characterized by four different methods, 1H N

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33

Wang, Yi-Ting, and 王薏婷. "Studies of reversible addition-fragmentation chain transfer polymerization behavior and synthesis and characterization of block copolymers." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/16746416726969320509.

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碩士<br>國立高雄應用科技大學<br>化學工程系碩士班<br>92<br>Reversible addition-fragmentation chain transfer (RAFT) polymerization has recently emerged as one of the living radical polymerization techniques to synthesize well-defined polymers. The purpose of this research aimed at the development of RAFT technique and preparation of block copolymers using this approach. First, three different kinds of chain transfer agents of dithiobenzoate were synthesized. These chain transfer agents were then used in the polymerization behavior studies of bulk, solution, emulsion and suspension polymerization. The

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Liang, Yao-Ren, and 梁耀仁. "Synthesis and Charaterization of Thiocarbonylthio Complex Containing Polystyrene via Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/43400926720362678087.

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碩士<br>大同大學<br>化學工程學系(所)<br>97<br>Synthetic polymers have Living/controlled radical polymerization with reversible addition-fragmentation chain transfer (RAFT polymerization) can be achieved with the use of novel organometallic ruthenium complex (a) [TpRuS2C-R, R = PPh3, OMe, OEt, Ph], (b) [TpRuS2P(OEt)2] {where Tp is hydridotripyrazolylborate, BH[(C3H3N2)3]}. Electron with drawing organometallic substituents can enhance the activity of RAFT reagents. In addition, the terminal organometallic functional group may be removed by subjecting the obtained polymer to elimination to provide the corre

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Schilli, Christine Maria [Verfasser]. "Novel precursors for polymer protein conjugate synthesis via reversible addition fragmentation chain transfer polymerization / vorgelegt von Christine Maria Schilli." 2003. http://d-nb.info/968492118/34.

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Wang, Mei-Hua, and 王美華. "Studies of the Living Free-Radical Polymerization Reactions in the presence of Reversible Addition-Fragmentation chain Transfer Agents: Electronic Effect." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/10225526734940661802.

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碩士<br>元智大學<br>化學工程學系<br>91<br>Living free radical polymerization plays a crucial role in preparing well-defined polymeric materials owing to its mild reaction conditions, compatibility with different monomers, and high tolerance to impurities, water and functional groups. Significant progress has been made in several areas including nitroxide-mediated stable free radical polymerization (NMP), atom transfer radical polymerization (ATRP), and reversible addition-fragmentation chain transfer polymerization (RAFT). Compared to ATRP and NMP, the RAFT process has the advantage of controlling polymer

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Mertoğlu, Murat [Verfasser]. "The synthesis of well defined functional homo- and block copolymers in aqueous media via Reversible Addition Fragmentation Chain Transfer (RAFT) Polymerization / von Murat Mertoğlu." 2005. http://d-nb.info/974309133/34.

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Norris, Brent Carl. "Applications of N-heterocycles in electrically and ionically conductive polymers." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-1772.

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The covalent bond formed between a N-heterocyclic carbene and an aryl-isothiocyanate was discovered to be thermally-reversible. This bond was incorporated into the backbone of an aromatic polymer which, when subjected to heat and excess monomer, would depolymerize to smaller oligomers. In addition these small molecules contain active chain ends and could be repolymerized to reform the original polymer. The high molecular weight material was made into freestanding sheets with desirable mechanical properties and could be made conductive by treatment with iodine. A new poly(triazene) was formed

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YEH, YAO-CHUAN, and 葉曜銓. "Preparation of Amphiphilic Block Copolymers by Reversible Addition-Fragmentation Chain Transfer Polymerization of Methacrylic Acid and 2-Dimethylamino ethyl methacrylate for a use as a Polymeric Emulsifier to Synthesize CO2-responsive Poly(methyl methacrylate) Core-Shell Nanoparticles." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/yg3gt9.

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TAI, PEI-YU, and 戴珮羽. "Preparation of Amphiphilic Block Copolymers by Reversible Addition-Fragmentation Chain Transfer Polymerization of 2-Dimethylamino Ethyl Methacrylate and N-Isopropyl Acrylamide for a use as a Polymeric Emulsifier to Synthesize CO2-Responsive Poly(methyl methacrylate) Core-Shell Nanoparticles." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/z6689v.

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