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Glass Transition Temperature of Cyclic Stars
ACS Macro Letters, 2014Cyclic homo- and diblock copolymers with different topologies were synthesized using a combination of "living" radical polymerization and "click" coupling reactions. The topologies included 2- and 3-arm stars, with the arms consisting of either cyclic or linear polystyrene.
Hossain Md. D. +3 more
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The glass transition temperatures of sugar mixtures
Carbohydrate Research, 2006We measured the glass transition temperatures of mono-, di-, and trisaccharide mixtures using differential scanning calorimeter (DSC) and analyzed these temperatures using the Gordon-Taylor equation. We found that the glass transition temperatures of monosaccharide-monosaccharide and disaccharide-disaccharide mixtures could be described by the ...
Jeong-Ah, Seo +5 more
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Glass-Transition Temperature of Water
Science, 1969The glass-transition temperature of water (T g ) has been calculated by use of the Tammann-Hesse viscosity equation with the viscosity equal to 10 13 poise at T g .
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Glass Transition Temperatures of Copolymers
Rubber Chemistry and Technology, 1958AbstractThe Gordon‐Taylor equation relating the glass transition temperature θ of a copolymer to the glass transition temperatures θ1 and θ2 of the homopolymers is equivalent to where c1 and c2 are the weight fractions of the constituents and A1 and A2 are constants. It can be recast into the following forms suitable for linear plots and where
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The Glass Transition Temperature of Polymer Melts
The Journal of Physical Chemistry B, 2005We develop an analytic theory to estimate the glass transition temperature T(g) of polymer melts as a function of the relative rigidities of the chain backbone and side groups, the monomer structure, pressure, and polymer mass. Our computations are based on an extension of the semiempirical Lindemann criterion of melting to locate T(g) and on the use ...
Jacek, Dudowicz +2 more
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When Does a Glass Transition Temperature Not Signify a Glass Transition?
ACS Macro Letters, 2014We present a simple model that links enhanced mobility at the free surface to the dilatometric glass transition temperature, Tg in thin films. The model shows that what is typically measured as a dilatometric Tg, characterized by the hallmark "kink" in the plot of film thickness versus temperature, only represents the dynamics of an infinitesimally ...
J A, Forrest, K, Dalnoki-Veress
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Estimation of the Glass Transition Temperature in Metallic Glasses
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 1996Abstract An empirical linear relationship Tg = (0.56 ± 0.05)Tm has been established for metallic glasses. This relationship provides a reasonable estimate of the glass transition temperatue Tg for a metallic system whose melting temperature is known.
J Baram
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Glass transition temperature in nylons
Polymer, 1976Abstract The determination of the glass transition temperature of semi-crystalline polymers is a controversial problem in the literature, because of the complexity of the phenomenon and of the different methods used for its measurement. In this work the glass transition temperatures of five commercial nylons (nylon-6, nylon-6,6, nylon-6,10, nylon-11,
R. Greco, L. Nicolais
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A Thermodynamical Criterion for the Glass-Transition Temperature
Transactions of the Society of Rheology, 1977A study, based upon the Gibbs free energy, is made of the thermodynamical behaviour of dissipative and memory-dependent materials. The creep-function mechanical properties involved are generalizations of the usual volumetric compressibility, the coefficient of thermal expansion, and the specific heat at constant pressure.
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Transitions in glasses at low temperatures
Journal of Macromolecular Science, Part B, 1967Transitions in glasses at low temperatures, noting molecular relaxation dependence on copolymer ...
Robert A. Haldon +2 more
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