Radiothermoluminescence and Transitions in Polymers |
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Page 33
... peak is almost 50 % bigger than the half - width toward the fall - off of the glow peak [ 41 ] . Second - order peaks are characterized by a practically symmetrical peak . A polymer usually has various kind of traps , and consequently ...
... peak is almost 50 % bigger than the half - width toward the fall - off of the glow peak [ 41 ] . Second - order peaks are characterized by a practically symmetrical peak . A polymer usually has various kind of traps , and consequently ...
Page 40
... peaks at high doses [ 20,53 ] . If I is the intensity of the glow peak maximum , r is the dose , and I。 and A are constants , the change in intensity of the thermoluminescence peak with dose can be presented as I = 10 [ 1 - exp ( -Ar ) ...
... peaks at high doses [ 20,53 ] . If I is the intensity of the glow peak maximum , r is the dose , and I。 and A are constants , the change in intensity of the thermoluminescence peak with dose can be presented as I = 10 [ 1 - exp ( -Ar ) ...
Page 89
... glow peak positions are due to the different degrees of molecular motion in different structural regions and the activation energies of the thermoluminescence peaks are in fact the molecular motion activation energies . The fact that ...
... glow peak positions are due to the different degrees of molecular motion in different structural regions and the activation energies of the thermoluminescence peaks are in fact the molecular motion activation energies . The fact that ...
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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 |