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Synthesis and characterization of st...

Granville, Anthony Michael.

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Synthesis and characterization of stimuli-responsive semifluorinated polymer brushes via atom transfer radical polymerization.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Synthesis and characterization of stimuli-responsive semifluorinated polymer brushes via atom transfer radical polymerization./
作者:	Granville, Anthony Michael.
面頁冊數:	167 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0769.
Contained By:	Dissertation Abstracts International65-02B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3123382
ISBN:	0496706934

Synthesis and characterization of stimuli-responsive semifluorinated polymer brushes via atom transfer radical polymerization.
Granville, Anthony Michael.

Synthesis and characterization of stimuli-responsive semifluorinated polymer brushes via atom transfer radical polymerization. - 167 p.

Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0769.

Thesis (Ph.D.)--The University of Akron, 2004.

The objective of this research was to develop semifluorinated diblock copolymer brushes using atom transfer radical polymerization (ATRP) from a surface-immobilized initiator. Polymer brushes are polymer chains covalently tethered to a surface at one end with a sufficiently high grafting density such that the chains extend from the surface. Semi-fluorinated diblock copolymer brushes should be capable of rearrangement upon treatment with a selective solvent so that the surface properties would alternate between those of a hydrocarbon polymer and those of a fluoropolymer.

ISBN: 0496706934Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Synthesis and characterization of stimuli-responsive semifluorinated polymer brushes via atom transfer radical polymerization.
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245 1 0 $a Synthesis and characterization of stimuli-responsive semifluorinated polymer brushes via atom transfer radical polymerization.
300 $a 167 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0769.
500 $a Adviser: William J. Brittain.
502 $a Thesis (Ph.D.)--The University of Akron, 2004.
520 $a The objective of this research was to develop semifluorinated diblock copolymer brushes using atom transfer radical polymerization (ATRP) from a surface-immobilized initiator. Polymer brushes are polymer chains covalently tethered to a surface at one end with a sufficiently high grafting density such that the chains extend from the surface. Semi-fluorinated diblock copolymer brushes should be capable of rearrangement upon treatment with a selective solvent so that the surface properties would alternate between those of a hydrocarbon polymer and those of a fluoropolymer.
520 $a Styrene and methyl acrylate were separately polymerized, using ATRP, from flat silica surfaces. From these surfaces, either a fluoroalkyl acrylate or 2,3,4,5,6-pentafluorostyrene was polymerized to generate a semi-fluorinated diblock copolymer brush. Control of the ATRP surface polymerizations was determined by analysis of the in situ generated free polymer chains and was found to correlate to separate solution ATRP kinetics experiments.
520 $a When treated with a block selective solvent for the hydrocarbon polymer and a poor solvent for the fluoropolymer, all semifluorinated diblock copolymers, except those containing poly(heptadecafluorodecyl acrylate), exhibited rearrangement. The extent of the rearrangement was measured via tensiometry, XPS, and AFM and was shown to correlate to the difference in solubility parameters for the individual blocks of the diblock copolymer brush. Rearrangement was reversed upon exposure to either a good solvent for both blocks or thermal treatment. The diblock rearrangement under thermal treatment was found to correlate to the Tg of the blocks. The synthesis of one of the semi-fluorinated brushes was also extended to a porous substrate. The micro-roughness of the substrate enhanced the contact angle of the fluoropolymer, generating an ultrahydrophobic layer. Upon treatment with a selective solvent, loss of the ultrahydrophobicity of the polymer brush surface was observed due to the rearrangement of the chains.
520 $a Finally, the synthesis of a fluorinated inner block followed by hydrocarbon outer block copolymer brush was performed via an acylation reaction of a tethered poly(2-hydroxyethyl methacrylate)-b-poly(methyl acrylate) brush to introduce fluorination. The surface was shown to rearrange under solvent and thermal treatment; however, the rearrangement was less efficient than when fluorination existed on the outer block of the copolymer brush.
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710 2 0 $a The University of Akron. $3 1018399
773 0 $t Dissertation Abstracts International $g 65-02B.
790 1 0 $a Brittain, William J., $e advisor
790 $a 0003
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3123382