We studied the fractionation of poly(ethylene oxide) (PEO) in isobutyric acid and water at different temperatures below the critical point. To do so, different molecular weight PEO with different end groups have been used. All the solutions were prepared at the…
Contents
I – INTRODUCTION
1 – Poly(ethylene oxide)
2 – Fractionation
3 – Coexistence Curve of Isobutyric Acid + Water
4 – New Analysis and Data
II – THEORETICAL BACKGROUND
1 – Flory Theory
2 – Ten Brinke and Szleifer Theory
III – PRIOR EXPERIMENTAL WORK
1 – Kinetics
2 – Molecular Weight Distribution
3 – Flory Theory
IV – NEW ANALYSIS OF PRIOR EXPERIMENTS
1 – Functional Form of Molecular Weight Distribution
2 – Mass in Coexisting Phases
V – NEW EXPERIMENTS
1 – Experimental methods
2 – Polymer samples
3 – Procedures
VI – RESULTS OF NEW EXPERIMENTS
1 – Sample 1: Mw = 20900; Termination = -OH
2 – Sample 2- PEG-OCH3: Molecular Weight of 4530
VII – DISCUSSION AND CONCLUSIONS
APPENDIX
REFERENCES
Author: Niamke, Justine N’Guessan
Source: University of Maryland
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