Radiothermoluminescence and Transitions in Polymers |
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Page 40
... effect has been most completely studied for polyethylenes . It has been established that dissolved oxygen has virtually no effect on the lowest temperature peak at 130 K but either completely removes peaks at 180 and 240 K ( doses below ...
... effect has been most completely studied for polyethylenes . It has been established that dissolved oxygen has virtually no effect on the lowest temperature peak at 130 K but either completely removes peaks at 180 and 240 K ( doses below ...
Page 104
... effects : ( 1 ) the degree of cross - linking , or 1 / Mc , and ( 2 ) the copolymer effect . The cross - linking effect always increases T ̧ and seems to be largely indepen- dent of chemical composition , whereas the copolymer effect ...
... effects : ( 1 ) the degree of cross - linking , or 1 / Mc , and ( 2 ) the copolymer effect . The cross - linking effect always increases T ̧ and seems to be largely indepen- dent of chemical composition , whereas the copolymer effect ...
Page 164
... effect may be expected in a system with very small domains where some of the charges origi- nating in one phase undergo trapping and subsequent detrapping in the other phase . Second , this effect can be due to the detrapping of ...
... effect may be expected in a system with very small domains where some of the charges origi- nating in one phase undergo trapping and subsequent detrapping in the other phase . Second , this effect can be due to the detrapping of ...
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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 |