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Articles 1 - 9 of 9

Full-Text Articles in Physics

Morphology And Transport Properties Of Two-Dimensional Sheet Polymers, Scott Knauert, Jack Douglas, Francis Starr Jan 2010

Morphology And Transport Properties Of Two-Dimensional Sheet Polymers, Scott Knauert, Jack Douglas, Francis Starr

Francis Starr

Whereas there has been extensive theoretical and experimental investigation of the properties of linear polymer chains in solution, there has been far less work on sheet-like polymers having 2D connectivity and 3D crumpled or collapsed shapes caused by thermal fluctuations, attractive self-interactions, or both. Sheet-like polymers arise in a variety of contexts ranging from self-assembled biological membranes (e.g., the spectrin network of red blood cells, microtubules, etc.) to nanocomposite additives to polymers (carbon nanotubes, graphene, and clay sheets) and polymerized monolayers. We investigate the equilibrium properties of this broad class of polymers using a simple model of a sheet polymer …


Current Issues In Research On Structure-Property Relationships In Polymer Nanocomposites, J. Jancar, J. Douglas, Francis Starr, S. Kumar, P. Cassagnau, A. Lesser, S. Sternstein, M. Buehler Jan 2010

Current Issues In Research On Structure-Property Relationships In Polymer Nanocomposites, J. Jancar, J. Douglas, Francis Starr, S. Kumar, P. Cassagnau, A. Lesser, S. Sternstein, M. Buehler

Francis Starr

No abstract provided.


Model For Reversible Nanoparticle Assembly In A Polymer Matrix, A. Rahedi, J. Douglas, Francis Starr Jan 2008

Model For Reversible Nanoparticle Assembly In A Polymer Matrix, A. Rahedi, J. Douglas, Francis Starr

Francis Starr

No abstract provided.


The Effect Of Nanoparticle Shape On Polymer-Nanocomposite Rheology And Tensile Strength, Scott Knauert, Jack Douglas, Francis Starr Jan 2007

The Effect Of Nanoparticle Shape On Polymer-Nanocomposite Rheology And Tensile Strength, Scott Knauert, Jack Douglas, Francis Starr

Francis Starr

No abstract provided.


Stringlike Correlated Motion In The Dynamics Of Supercooled Polymer Melts, M. Aichele, Y. Gebremichael, Francis Starr, J. Baschnagel, S. C. Glotzer Jan 2003

Stringlike Correlated Motion In The Dynamics Of Supercooled Polymer Melts, M. Aichele, Y. Gebremichael, Francis Starr, J. Baschnagel, S. C. Glotzer

Francis Starr

No abstract provided.


Origin Of Particle Clustering In A Simulated Polymer Nanocomposite And Its Impact On Rheology, Francis W. Starr, J. F. Douglas, S. C. Glotzer Jan 2003

Origin Of Particle Clustering In A Simulated Polymer Nanocomposite And Its Impact On Rheology, Francis W. Starr, J. F. Douglas, S. C. Glotzer

Francis Starr

Many nanoparticles have short-range interactions relative to their size, and these interactions tend to be ‘‘patchy’’ since the interatomic spacing is comparable to the nanoparticle size. For a dispersion of such particles, it is not a priori obvious what mechanism will control the clustering of the nanoparticles, and how the clustering will be affected by tuning various control parameters. To gain insight into these questions, we perform molecular dynamics simulations of polyhedral nanoparticles in a dense bead–spring polymer melt under both quiescent and steady shear conditions. We explore the mechanism that controls nanoparticle clustering and find that the crossover from …


Molecular Dynamics Simulation Of A Polymer Melt With A Nanoscopic Particle, Francis W. Starr, T. B. Schroder, S. C. Glotzer Jan 2002

Molecular Dynamics Simulation Of A Polymer Melt With A Nanoscopic Particle, Francis W. Starr, T. B. Schroder, S. C. Glotzer

Francis Starr

No abstract provided.


Spatially Correlated Dynamics In A Simulated Glass-Forming Polymer Melt: Analysis Of Clustering Phenomena, Y. Gebremichael, T. B. Schroder, Francis W. Starr, S. C. Glotzer Jan 2001

Spatially Correlated Dynamics In A Simulated Glass-Forming Polymer Melt: Analysis Of Clustering Phenomena, Y. Gebremichael, T. B. Schroder, Francis W. Starr, S. C. Glotzer

Francis Starr

No abstract provided.


Effects Of A Nanoscopic Filler On The Structure And Dynamics Of A Simulated Polymer Melt And The Relationship To Ultra-Thin Films, Francis W. Starr, T. B. Schroder, S. C. Glotzer Jan 2001

Effects Of A Nanoscopic Filler On The Structure And Dynamics Of A Simulated Polymer Melt And The Relationship To Ultra-Thin Films, Francis W. Starr, T. B. Schroder, S. C. Glotzer

Francis Starr

No abstract provided.