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Rubber Elasticity of Poly ( N-isopropylacrylamide ) Gels at Various Charge Densities
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gundogan, Nermin Melekaslan, Demet Okay, Oguz |
| Abstract | The mechanical properties and the swelling behavior of a series of N-isopropylacrylamide copolymers with the sodium salt of 2-acrylamido-2-methylpropanesulfonic acid were investigated. The increase of the equilibrium gel volume Veq with the charge density fN was considerably weaker (Veq ≈ fN0.75) than expected assuming Gaussian statistics (Veq ≈ fN1.5). This deviation is interpreted as the nonGaussian elasticity of the hydrogels swollen to equilibrium. The exponent 0.75 found indicates that the elastic free energy ∆Gel scales with the linear swelling ratio R as ∆Gel ≈ R4, thus deviating from ∆Gel ≈ R2 derived using Gaussian chain statistics. This expression for the elastic free energy explains the behavior of elastic modulus data of the equilibrium swollen hydrogels. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://web.itu.edu.tr/okayo/pdf/02macronermin.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Edema Elastic Modulus Elasticity (data store) Gel Hydrogels Kind of quantity - Equilibrium Modulus robot Normal Statistical Distribution Poly A free energy poly ICLC sodium salts |
| Content Type | Text |
| Resource Type | Article |
