Radiothermoluminescence and Transitions in Polymers |
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Page 66
... activation enthalpy , and activation entropy of the corresponding molecular motion , R is the gas constant , and T ... energy barriers because of the higher thermal energies . Depending on their activation entropies , viscoelastic ...
... activation enthalpy , and activation entropy of the corresponding molecular motion , R is the gas constant , and T ... energy barriers because of the higher thermal energies . Depending on their activation entropies , viscoelastic ...
Page 93
... activation energies is present and the luminescence process follows first - order kinetics . Along with obtaining the distribution of activation energies , the method also allows evaluation of the temper- ature dependence of the ...
... activation energies is present and the luminescence process follows first - order kinetics . Along with obtaining the distribution of activation energies , the method also allows evaluation of the temper- ature dependence of the ...
Page 116
... activation energies of the glow peaks by a number of different methods and obtained the value of 0.084 eV for the ... energy and frequency - con- stant values clearly indicate the " simple " nature of this transition , whose tempera- ture and ...
... activation energies of the glow peaks by a number of different methods and obtained the value of 0.084 eV for the ... energy and frequency - con- stant values clearly indicate the " simple " nature of this transition , whose tempera- ture and ...
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Common terms and phrases
activation energy annealing atactic atoms blend changes charge Charlesby Chem chemical cis-polybutadiene components concentration constant cooling copolymer cross-linking crystal decay decrease density depends dielectric distribution dose E/kT electron affinity electron traps emission entropy equilibrium evaluation excited molecules factor first-order fluorescence fraction free volume frequency frequency factor glass glass-transition temperature glow curve glow peak grafting heating increase INTENSITY relative units interaction interfacial intersystem crossing interzonal ionization irradiation isotactic kinetic linear low-temperature luminescence centers LUMINESCENCE INTENSITY relative Macromolecules material maxima maximum mechanical melting method molecular motion molecules Nikolskii nuclear magnetic resonance observed occur oxygen phase phosphorescence Phys polybutadiene polyethylene samples polyisobutylene polypropylene polystyrene position quenching radiation radicals radiothermoluminescence reaction recombination relaxation transitions room temperature secondary relaxation semicrystalline semicrystalline polymers spectra spectroscopy structure temperature thermal thermodynamic thermoluminescence thermoluminescence peaks tion transition temperature trapped electrons untrapping vibrational vinyl vulcanization whereas Zlatkevich
References to this book
Polymer Surfaces and Interfaces II, Volume 2 W. J. Feast,H. S. Munro,R. W. Richards Snippet view - 1993 |