Journal article
Soluble chain fractions in hydrophilic polymer networks: origin and effect on dynamic uptake overshoots
Polymer (Guilford), Vol.31(7), pp.1288-1293
1990
DOI: 10.1016/0032-3861(90)90221-J
Abstract
The dynamic swelling behaviour of crosslinked poly(2-hydroxyethyl methacrylate) networks containing well characterized soluble fractions of poly(ethylene glycol) was studied. The mass uptake as a function of time exhibited a significant overshoot above the final equilibrium value. The magnitude and duration of the overshoot depended on the concentration and molecular weight of the soluble fraction, and was attributed to the presence of the soluble fraction. A statistical model was used to show that polymer networks formed by free-radical copolymerization and crosslinking reactions may contain a significant intrinsic soluble fraction made up of unreacted monomer and polymer chains that have not become incorporated into the gel. It is therefore suggested that this soluble fraction may contribute to swelling overshoot. The statistical model was used to relate the quantity and molecular weight of the intrinsic soluble fraction to the free-radial reaction parameters.
Details
- Title: Subtitle
- Soluble chain fractions in hydrophilic polymer networks: origin and effect on dynamic uptake overshoots
- Creators
- Alec B Scranton - University of Iowa, Chemical and Biochemical EngineeringJohn KlierNikolaos A Peppas - Purdue University West Lafayette
- Resource Type
- Journal article
- Publication Details
- Polymer (Guilford), Vol.31(7), pp.1288-1293
- DOI
- 10.1016/0032-3861(90)90221-J
- ISSN
- 0032-3861
- eISSN
- 1873-2291
- Publisher
- Elsevier Ltd
- Language
- English
- Date published
- 1990
- Academic Unit
- Chemical and Biochemical Engineering
- Record Identifier
- 9983557399202771
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