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RESEARCH PRODUCT
Equilibrium swelling and solvation studies on crosslinked polyacrylamides
Yu ChenS. DevipriyaMary JosephTessymol MathewSunny KuriakoseSunny Kuriakosesubject
chemistry.chemical_classificationMaterials sciencePolymers and PlasticsOrganic ChemistryPolyacrylamideSolvationSolution polymerizationPolymerDivinylbenzenechemistry.chemical_compoundHildebrand solubility parameterchemistrySelf-healing hydrogelsPolymer chemistryMaterials ChemistrymedicineSwellingmedicine.symptomdescription
Polyacrylamide (PA) crosslinked with four different crosslinking agents, triethyleneglycol dimethacrylate (TEGDMA), N,N′-methylene bisacrylamide (NNMBA), hexanediol dimethacrylate (HDDMA) and divinylbenzene (DVB), with mole percents ranging from 5 to 20, was prepared by solution polymerization and subjected to swelling and solvation studies. Solubility parameters and cohesive energy density were determined from swelling studies. Molecular weight between crosslinks for these systems were determined by Flory–Rehner analysis. There is a discontinuous volume change for 10% NNMBA and HDDMA crosslinked PA, 15% TEGDMA crosslinked PA and 10 and 15% DVB crosslinked PA in solvent mixtures of acetic acid and water due to phase change occurring at this stage. The hydrogels exhibit inhomogeneous crosslink distribution due to multiple crosslinking, cyclization and network irregularity owing from arising from entanglements. As the percentage of crosslinking increases, crosslinks become more homogeneous due to a decrease in entanglements. Copyright © 2004 Society of Chemical Industry
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-05-05 | Polymer International |