31 citations · 164 across the 58 of their papers we have counts for
10 papers · 1 filter
Compressible or incompressible blend of interacting monodisperse star and linear polymers near a surface
Richard Batman, P. D. Gujrati
We consider a lattice model of a mixture of repulsive, attractive, or neutral monodisperse star (species A) and linear (species B) polymers with a third monomeric species C, which…
The Concept of Entropy and its Concavity for a Finite Protein in its Environment: An exact study on a Square Lattice
P. D. Gujrati, Bradley Lambeth
We consider a general lattice model of a finite protein in its environment and calculate its Boltzmann entropy SB(E) as a function of its energy E in a microcanonical ensemble, and…
Entropy Crisis, Defects and the Role of Competition in Monatomic Glass Formers
P. D. Gujrati
We establish the existence of an entropy crisis in monatomic glass formers. The work finally shows that the entropy crisis is ubiqutous in all supercooled liquids. We also study th…
Solubility in Compressible Polymers: Beyond the Regular Solution Theory
Albert A. Smith, P. D. Gujrati
The age-old idea of "like dissolves like" requires a notion of "likeness" that is hard to quantify for polymers. We revisit the concepts of pure component cohesive energy density $…
Percolation of particles on recursive lattices: (III) percolation of polydisperse particles in the presence of a polymer matrix
Andrea Corsi, P. D. Gujrati
We use a recently developed lattice model to study the percolation of particles of different sizes and shapes in the presence of a polymer matrix. The polymer is modeled as an infi…
Percolation of particles on recursive lattices: (II) the effect of size and shape disparities
Andrea Corsi, P. D. Gujrati
The preparation of many composites requires the intermixing of several macromolecular fluids along with the addition of solid filler particles. These fillers are usuallly polydispe…
Percolation of particles on recursive lattices: (I) a new theoretical approach
Andrea Corsi, P. D. Gujrati
Powdered materials of sizes ranging from nanometers to microns are widely used in materials science and are carefully selected to enhance the performance of a matrix. Fillers have…
General Mechanism for a Positive Temperature Entropy Crisis in Stationary Metastable States: Thermodynamic Necessity and Confirmation by Exact calculations
P. D. Gujrati
We study stationary metastable states(SMS's)using a restricted partition function formalism. The formalism ensures that SMS free energy exists all the way to T=0, and remains stabl…
Entropy Crisis, Ideal Glass Transition and Polymer Melting: Exact Solution on a Husimi Cactus
Andrea Corsi, P. D. Gujrati
We introduce an extension of the lattice model of melting of semiflexible polymers originally proposed by Flory. Along with a bending penalty, present in the original model and inv…
Reliably Estimating Bare Chi from Compressible Blends in the Grand Canonical Ensemble
Sagar S. Rane, P. D. Gujrati
The bare chi characterizing polymer blends plays a significant role in their macroscopic description. Therefore, its experimental determination, especially from small-angle-neutron…