Radiothermoluminescence and Transitions in Polymers |
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Page 15
... Radicals Produced by Irradiation Radicals are defined as such molecules or fragments in which the chemical bond is modified to result in an electron having uncompensated spin . The position in the molecule where this modification occurs ...
... Radicals Produced by Irradiation Radicals are defined as such molecules or fragments in which the chemical bond is modified to result in an electron having uncompensated spin . The position in the molecule where this modification occurs ...
Page 16
... radical dissociation occurs , the free radicals formed may engage in the following types of reactions : 1. Radical - radical recombination reactions . These occur primarily in the spurs , where the concentration of radicals is high : Rj ...
... radical dissociation occurs , the free radicals formed may engage in the following types of reactions : 1. Radical - radical recombination reactions . These occur primarily in the spurs , where the concentration of radicals is high : Rj ...
Page 17
... radicals are extremely important in radiation chemistry . There is considerable evidence that in many organic systems the G values for radical production ( resulting from excitation ) run to about 3-5 , whereas the G values for ion ...
... radicals are extremely important in radiation chemistry . There is considerable evidence that in many organic systems the G values for radical production ( resulting from excitation ) run to about 3-5 , whereas the G values for ion ...
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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 |