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The critical endpoint in phase diagrams of attractive hard spheres

Fleer, Gerard J.; Tuinier, Remco - In: Physica A: Statistical Mechanics and its Applications 379 (2007) 1, pp. 52-58

attraction and a polymer depletion potential, using approximate analytical theories. The cep corresponds to the minimum …

Persistent link: https://www.econbiz.de/10010590867

Adsorption and collapse transitions of a linear polymer chain interacting with a surface adsorbed polymer chain

Kumar, Sanjay; Singh, Yashwant - In: Physica A: Statistical Mechanics and its Applications 293 (2001) 3, pp. 345-357

We study the problem of adsorption and collapse transition of a linear polymer chain situated in a fractal container … represented by a four-simplex lattice and interacting with a surface-adsorbed linear polymer chain. The adsorbed chain monomers … act as pinning sites for the polymer chain. This problem has been solved exactly using real space renormalization group …

Persistent link: https://www.econbiz.de/10010591375

Phase diagram for irregular and non-symmetric cross-linked polymer blends

Vargas, Edilson; Barbosa, Marcia C. - In: Physica A: Statistical Mechanics and its Applications 257 (1998) 1, pp. 312-318

We consider a blend made of two types of polymers, A and B, of different chemical nature. At high temperature, the homogeneous mixture is cross-linked. As the temperature is lowered, the two species try to segregate but are kept together by the cross-links. We show that for inhomogeneous,...

Persistent link: https://www.econbiz.de/10010599543

Investigation of deactivation mechanisms of a solid acid catalyst during esterification of the bio-oils from mallee biomass

Hu, Xun; Lievens, Caroline; Mourant, Daniel; Wang, Yi; … - In: Applied Energy 111 (2013) C, pp. 94-103

This study reports the deactivation mechanisms of the solid acid catalyst Amberlyst 70 during the esterification of bio-oils from mallee biomass and the methods for catalyst regeneration. The metal ions in bio-oil deactivated Amberlyst 70 via ion exchange with the hydrogen ions on/in catalyst,...

Persistent link: https://www.econbiz.de/10010702687

RNA-like model on the Husimi lattice

Zara, Reginaldo A.; Pretti, Marco - In: Physica A: Statistical Mechanics and its Applications 371 (2006) 1, pp. 88-91

We investigate a two-tolerant polymer model on the square Husimi lattice, aiming to describe RNA-like properties. We …

Persistent link: https://www.econbiz.de/10011059227

Necklace model of randomly charged polymers

Kantor, Yacov; Kardar, Mehran; Ertaş, Deniz - In: Physica A: Statistical Mechanics and its Applications 249 (1998) 1, pp. 301-306

Spatial conformations of randomly charged polymers (polyampholytes (PAs)) strongly depend on their total (excess) charge Q. For Q larger (smaller) that some critical value the PA is expanded (collapsed). The transition between the collapsed and the expanded states is reminiscent of the Rayley...

Persistent link: https://www.econbiz.de/10011059278

Polymer localization in random potential

Craig, A.; Terentjev, E.M.; Edwards, S.F. - In: Physica A: Statistical Mechanics and its Applications 384 (2007) 2, pp. 150-164

This work re-examines the classical problem of polymer collapse in a random system, using a Gaussian variational … breaking between the replicas used to analyze such quenched systems, and the scaling of the globular collapse with the disorder …. Phys. 89 (1988) 2435], but we anticipate a different scaling with dimensionality in other cases, with the globule square …

Persistent link: https://www.econbiz.de/10011060867

Turbulent drag reduction characteristics induced by calf-thymus DNA

Lim, S.T.; Park, S.J.; Chan, C.K.; Choi, H.J. - In: Physica A: Statistical Mechanics and its Applications 350 (2005) 1, pp. 84-88

We report novel turbulent drag reduction (DR) behaviors of polydisperse calf-thymus DNA (CT-DNA) as a potential drag reducing candidate, by injecting appropriately prepared concentrated stock solution of the CT-DNA into a buffer solution in a rotating disk apparatus. By putting emphasis on the...

Persistent link: https://www.econbiz.de/10011062016

Time-dependent nonlinear growth theory of linear chains

Gündüz, Güngör - In: Physica A: Statistical Mechanics and its Applications 234 (1996) 1, pp. 386-406

A theory was developed for the nonlinear growth of linear chains by incorporating the chain dynamics into the rate equation. This was achieved by using a modified Boltzmann equation. The chains were first divided into two groups as reacting and unreacting chains in any time interval. The...

Persistent link: https://www.econbiz.de/10011062951

Network in a polymer: Inputs from experimental data

Razdan, Ashok - In: Physica A: Statistical Mechanics and its Applications 394 (2014) C, pp. 365-369

iron acrylate polymer from the monomer stage onwards. Our primary aim is to use experimental data to calculate the … the degree distribution of iron acrylate polymer follows an exponential distribution. …

Persistent link: https://www.econbiz.de/10011064500