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3685275 
Journal Article 
The effects of solvent polarity and pKa on the absorption of solvents into poly(glutaric acid-glycerol) films 
Wyatt, VT 
2014 
Yes 
Journal of Applied Polymer Science
ISSN: 0021-8995
EISSN: 1097-4628 
Journal of applied polymer science 
131 
13 
n/a-n/a 
WOS:000334600500067 
Abstract: In this study, SOLVENT* absorption into the matrices of poly(glutaric acid-glycerol) films has been evaluated. It was determined that the combined effects of polarity and the size and shape of the SOLVENT* molecule, rather than pKa, have the most significant influence on absorption into the films. Polar aprotic SOLVENT*s (with SOLVENT* polarity index values >4) such as 1,4-dioxane (absorbed 163.8% 6 0.3% [w/w] of the original weight of the polymer), pyridine (200.4% 6 3.5%), and dimethyl sulfoxide (186.0% 6 11.4%) were among the highest absorbed SOLVENT*s into the polymer matrix. SOLVENT*s with polarity index values 4.0 were absorbed poorly (5.3% 6 1.5%). The polymer films only absorbed 26.5% 6 2.1% of their weight of most protic SOLVENT*s (water and mono-alcohols) but absorbed 72.6% 6 6.5% of ethylene glycol, a diol. The only high absorbing polar protic SOLVENT* was acetic acid (131% 6 13.1%). Except for chloroform, ethyl acetate, and ethanol, all of the SOLVENT*s examined displayed small increases in absorption (7.8%, on average) when the films were desorbed and used again to absorb SOLVENT*. Erosion of the films ranged from 0.0% 6 0.0% to 22.0% 6 3.2% after 2–10 h absorption cycles. Miscible (7.7% 6 2.3% to 15.1% 6 2.2%) and immiscible (12.3% 6 6.4% to 80.0% 6 1.9%) SOLVENT*s were preferentially absorbed from aqueous solutions. However, up to approximately 5% of those absorption values could be from water absorption. VC 2014 Wiley Periodicals, Inc.†J. Appl. Polym. Sci. 2014, 131, 40434. ds: Internet resource produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. e field[29]: 1,4-Dioxane 
adsorption; biomaterials; biosynthesis of polymers; gels; polyesters 
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