Polymer Networks

Reversible networks

Reversible networks made by macromolecules or small molecules exhibit unique visco-elastic properties. We are investigating the rheology of associating polymer networks on the basis of molecular models.

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1. "Associations Leading to Formation of Reversible Networks and Gels" by M. Rubinstein and A. V. Dobrynin, Current Opinion in Colloid & Interface Science 4, 83-87 (1999).

2. "Thermoreversible Gelation in Solutions of Associative Polymers. 1. Statics" by A. N. Semenov and M. Rubinstein, Macromolecules 31, 1373-1385 (1998).

3. "Thermoreversible Gelation in Solutions of Associative Polymers. 2. Linear Dynamics" by M. Rubinstein and A. N. Semenov, Macromolecules 31, 1386-1397 (1998).

4. "Solutions of Associative Polymers" by M. Rubinstein and A. V. Dobrynin, TRIP 5, 181-186 (1997).

5. "Dynamics of Telechelic Ionomers. Can Polymer Diffuse Large Distances without Relaxing Stress?" by L. Leibler, M. Rubinstein and R. H. Colby, J. Phys. II (France), 3, 1581-1590 (1993).

6. "Dynamics of Reversible Networks" by L. Leibler, M. Rubinstein and R. H. Colby, Macromolecules 24, 4701-4707 (1991).

 

 

Nonlinear elasticity and swelling of entangled gels

Entangled gels exhibit nonlinear elasticity under either uniaxial or biaxial deformations. We study effects of entanglements and how they contribute on nonlinear elasticity of polymer networks. We are developing theory of swelling and de-swelling of entangled gels.

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1. "Network Modulus and Superelasticity" by S. P. Obukhov, M. Rubinstein and R. H. Colby, Macromolecules, 27, 3191-3198 (1994).

2. "Elastic Modulus and Equilibrium Swelling of Near Critical Gels" by M. Rubinstein and R. H. Colby, Macromolecules, 27, 3184-3190 (1994).

3. "Elastic Modulus and Equilibrium Swelling of Polyelectrolyte Gels" by M. Rubinstein, R. H. Colby, A. V. Dobrynin and J. F. Joanny, Macromolecules 29, 398-406 (1996).

4. "Non-Affine Deformation and Elasticity of Polymer Networks" by M. Rubinstein and S. P. Panyukov, Macromolecules 30, 8036-8044 (1997).

5. "Elasticity of Polymer Networks" by M. Rubinstein and S. Panyukov, Macromolecules, 35, 6670-6686 (2002).

6. "Explanation of Anomalous Scaling of Swollen Entangled Chains" by S. Panyukov, and M. Rubinstein, Macromolecules 38, 3511-3514 (2005).

 

Polymer Entanglements and Elasticity

After several decades of investigation, the precise role polymer entanglements play in the elasticity of melts and networks is still an open problem. We use single-chain simulations in conjunction with full scale molecular dynamics simulations to develop better theoretical models of elasticity of polymer melts and gels.

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