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Interaction of ionic liquid-dissolve...

Harner, John M.

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Interaction of ionic liquid-dissolved polymers.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Interaction of ionic liquid-dissolved polymers./
Author:	Harner, John M.
Description:	168 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4274.
Contained By:	Dissertation Abstracts International71-07B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3409586
ISBN:	9781124072487

Interaction of ionic liquid-dissolved polymers.
Harner, John M.

Interaction of ionic liquid-dissolved polymers. - 168 p.

Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4274.

Thesis (Ph.D.)--University of Massachusetts Amherst, 2010.

Ionic liquids (ILs), neoteric salts with Tm < 100°C, have garnered vast interest due to a number of unique properties including vanishingly low volatility, non-toxicity and property tunability. Many polymers were found to dissolve in ILs, and polymer solution properties were measured using the room temperature IL 1-ethyl-3-methylimidiazolium ethylsulfate, [EMIM][EtSO 4], as a model IL. Polyethylene glycol (PEG) dissolves in [EMIM][EtSO 4] above &sim;60°C, the neat polymer's melting temperature, and if concentration and molecular weight are high enough, the solution transforms into a semi-transparent gel at lower temperature. Thermoreversible gelation is traced to kinetically frustrated polymer crystallization, a mechanism established previously for many pairings of crystallizable polymer with aqueous or organic solvent. Negatively and positively charged polymers dissolve in [EMIM][EtSO 4], typically over long time periods, and solution chain properties are measured using common physiochemical techniques. Electrostatic interactions of sodium poly(styrene sulfonate) are screened without the need of added salt due to the presence of the charged solvent and size-molecular weight relationships indicate sodium poly(styrene sulfonate) assumes a coiled conformation in solution. Lysozyme dissolves in [EMIM][EtSO4] assuming an expanded conformation with compromised secondary structure, the unfolded structure stabilized by the IL. Preferential solvation of dissolved lysozyme in mixed [EMIM][EtSO 4]/H2O solvents prevents lysozyme aggregation above its denaturation temperature.

ISBN: 9781124072487Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Interaction of ionic liquid-dissolved polymers.
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035 $a (UMI)AAI3409586
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100 1 $a Harner, John M. $3 1678223
245 1 0 $a Interaction of ionic liquid-dissolved polymers.
300 $a 168 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4274.
500 $a Adviser: David A. Hoagland.
502 $a Thesis (Ph.D.)--University of Massachusetts Amherst, 2010.
520 $a Ionic liquids (ILs), neoteric salts with Tm < 100°C, have garnered vast interest due to a number of unique properties including vanishingly low volatility, non-toxicity and property tunability. Many polymers were found to dissolve in ILs, and polymer solution properties were measured using the room temperature IL 1-ethyl-3-methylimidiazolium ethylsulfate, [EMIM][EtSO 4], as a model IL. Polyethylene glycol (PEG) dissolves in [EMIM][EtSO 4] above &sim;60°C, the neat polymer's melting temperature, and if concentration and molecular weight are high enough, the solution transforms into a semi-transparent gel at lower temperature. Thermoreversible gelation is traced to kinetically frustrated polymer crystallization, a mechanism established previously for many pairings of crystallizable polymer with aqueous or organic solvent. Negatively and positively charged polymers dissolve in [EMIM][EtSO 4], typically over long time periods, and solution chain properties are measured using common physiochemical techniques. Electrostatic interactions of sodium poly(styrene sulfonate) are screened without the need of added salt due to the presence of the charged solvent and size-molecular weight relationships indicate sodium poly(styrene sulfonate) assumes a coiled conformation in solution. Lysozyme dissolves in [EMIM][EtSO4] assuming an expanded conformation with compromised secondary structure, the unfolded structure stabilized by the IL. Preferential solvation of dissolved lysozyme in mixed [EMIM][EtSO 4]/H2O solvents prevents lysozyme aggregation above its denaturation temperature.
590 $a School code: 0118.
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0495
710 2 $a University of Massachusetts Amherst. $b Polymer Science & Engineering. $3 1018485
773 0 $t Dissertation Abstracts International $g 71-07B.
790 1 0 $a Hoagland, David A., $e advisor
790 1 0 $a Hayward, Ryan C. $e committee member
790 1 0 $a Dubin, Paul L. $e committee member
790 $a 0118
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3409586