Living radical polymerization and surface modification of polypropylene by entrapment functionalization /
Living radical polymerization has become an important area of research. Monomers that were previously incompatible with anionic cationic living polymerizations, can now be polymerized in a controlled manner. A new class of unimolecular initiators for the 2,2,6,6-tetramethylpiperidinyloxy free rad...
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
2000.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=731981451&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | Living radical polymerization has become an important area of research. Monomers that were previously incompatible with anionic cationic living polymerizations, can now be polymerized in a controlled manner. A new class of unimolecular initiators for the 2,2,6,6-tetramethylpiperidinyloxy free radical (TEMPO) mediated polymerization of styrene was developed. The initiators are comprised of an allylic initiating fragment and TEMPO. They were prepared by oxidation and subsequent Meisenheimer rearrangement of the allylic N-oxide compounds. These initiators produce well-defined polystyrene having low polydispersity and controlled molecular weights. Another method for controlled radical polymerization is based upon metal mediated. This technique is also known as atom transfer radical polymerization (ATRP). A functional initiator for ATRP was developed. The initiator was not only useful for initiating polymerizations but was also as a fluorescent probe and linker molecule for making diblock copolymers. The surfaces of polyolefins are hydrophobic and as such, are not compatible with many adhesives, paints, dyes etc. Functional groups were introduced to polypropylene surfaces by entrapment fuctionalization. The functional groups were introduced as block copolymers of polypropylene and tert-butyl acrylate by mixing with high molecular weight polypropylene and producing solvent cast thin films. The block copolymers were prepared by borane assisted radical polymerization from a polypropylene oligomer. The films made by this entrapment technique were studied by a variety of fluorescence and other spectroscopic methods. |
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| Item Description: | Vita. "Major Subject: Chemistry". |
| Physical Description: | xiii, 133 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 127-132). |