Search Results - "Lipson, Jane E. G"

Polymer Free Volume and Its Connection to the Glass Transition by White, Ronald P, Lipson, Jane E. G

“…In this Perspective we summarize the most widely used definitions of free volume and illustrate the differences between them, including the important…”
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To Understand Film Dynamics Look to the Bulk by White, Ronald P., Lipson, Jane E. G.

“…We show that shifts in dynamics of confined systems relative to that of the bulk material originate in the properties of bulk alone, and exhibit the same form…”
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Why Volume and Dynamics Decouple in Nanocomposite Matrices: Space that Cannot Be Accessed is Not Free by White, Ronald P, Lipson, Jane E G

“…Polymer nanocomposites have important material applications and are an ongoing focus of many molecular level investigations, however, puzzling experimental…”
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Substrate Roughness Speeds Up Segmental Dynamics of Thin Polymer Films by Panagopoulou, Anna, Rodríguez-Tinoco, Cristian, White, Ronald P, Lipson, Jane E G, Napolitano, Simone

“…We show that the segmental mobility of thin films of poly(4-chlorostyrene) prepared under nonequilibrium conditions gets enhanced in the proximity of rough…”
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Dynamics across a Free Surface Reflect Interplay between Density and Cooperative Length: Application to Polystyrene by White, Ronald P, Lipson, Jane E. G

“…It is now generally agreed that the most dramatic influence of a free surface on local relaxation dynamics occurs over the first 10 nm from the surface. Using…”
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A Simple New Way To Account for Free Volume in Glassy Dynamics: Model-Free Estimation of the Close-Packed Volume from PVT Data by White, Ronald P, Lipson, Jane E. G

“…In this article we focus on the important role of well-defined free volume (V free) in dictating the structural relaxation times, τ, of glass-forming liquids…”
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Effect of Interfaces on the Glass Transition of Supported and Freestanding Polymer Thin Films by White, Ronald P, Price, Christopher C, Lipson, Jane E. G

“…We investigate the glass transition behavior in polymer thin films using a model equation-of-state approach, which involves molecular parameters whose values…”
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Experimental Test of the Cooperative Free Volume Rate Model under 1D Confinement: The Interplay of Free Volume, Temperature, and Polymer Film Thickness in Driving Segmental Mobility by Debot, Alice, White, Ronald P, Lipson, Jane E. G, Napolitano, Simone

“…We show that the Cooperative Free Volume (CFV) rate model, successful at modeling pressure-dependent dynamics, can be employed to describe the temperature and…”
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How Free Volume Does Influence the Dynamics of Glass Forming Liquids by White, Ronald P, Lipson, Jane E. G

“…In this article we show that inverse free volume is a natural variable for analyzing relaxation data on glass-forming liquids, and that systems obey the…”
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Experimental and Modeling Comparison of the Dynamics of Capped and Freestanding Poly(2-chlorostyrene) Films by Song, Zijian, White, Ronald P, Lipson, Jane E. G, Napolitano, Simone

“…Proximity to a nonrepulsive wall is commonly considered to cause slower dynamics, which should lead to greater relaxation times for capped thin polymer films…”
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Local and Average Glass Transitions in Polymer Thin Films by Lipson, Jane E. G, Milner, Scott T

“…In the companion paper (DOI 10.1021/ma101098d), we presented a quantitative theory for the suppression of the glass transition in a thin polymer film. Our…”
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Free Volume in the Melt and How It Correlates with Experimental Glass Transition Temperatures: Results for a Large Set of Polymers by White, Ronald P, Lipson, Jane E. G

“…There is a continuing, strong interest in making connections between the polymeric glass transition (T g) and bulk properties. In this Letter we apply the…”
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Origins of Unusual Phase Behavior in Polymer/Ionic Liquid Solutions by White, Ronald P, Lipson, Jane E. G

“…Recent experimental studies [ Lee Macromolecules 2012, 45, 3627−3633 ] on polymer/IL solutions of poly(ethylene oxide) (PEO) and 1-ethyl-3-methylimidazolium…”
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Polymer Miscibility in Supercritical Carbon Dioxide: Free Volume as a Driving Force by DeFelice, Jeffrey, Lipson, Jane E. G

“…In this article, we connect the experimental miscibility of several polymer/supercritical carbon dioxide (scCO2) mixtures with their pure component properties,…”
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Global and Local Views of the Glass Transition in Mixtures by Lipson, Jane E. G

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Connecting Pressure-Dependent Dynamics to Dynamics under Confinement: The Cooperative Free Volume Model Applied to Poly(4-chlorostyrene) Bulk and Thin Films by White, Ronald P, Lipson, Jane E. G

“…We apply our cooperative free volume (CFV) rate model for pressure-dependent dynamics to describe the relaxation times for poly­(4-chlorostyrene) (P4ClS) bulk…”
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Multiple glass transitions and local composition effects on polymer solvent mixtures by Lipson, Jane E. G., Milner, Scott T.

“…Recent differential scanning calorimetry (DSC) results on polystyrene–solvent mixtures show two distinct glass transitions whose positions and widths vary with…”
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Pressure-Dependent Dynamics of Polymer Melts from Arrhenius to Non-Arrhenius: The Cooperative Free Volume Rate Equation Tested against Simulation Data by White, Ronald P, Lipson, Jane E. G

“…We apply the cooperative free volume (CFV) model to analyze the segmental relaxation times, τ­(T,V), of a model 20-mer polymer melt simulated via molecular…”
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The cooperative free volume rate model for segmental dynamics: Application to glass-forming liquids and connections with the density scaling approach by White, Ronald P., Lipson, Jane E. G.

“… In this paper, we apply the cooperative free volume (CFV) rate model for pressure-dependent dynamics of glass-forming liquids and polymer melts. We analyze…”
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Simulating Local T g Reporting Layers in Glassy Thin Films by DeFelice, Jeffrey, Milner, Scott T, Lipson, Jane E. G

“…One of the most notable deviations from bulk fluid properties is the onset of a thickness-dependent glass transition temperature (T g) for nanometrically thin…”
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