Radiothermoluminescence and Transitions in Polymers |
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Page 63
... entropy ) , there occurs a greater and greater difficulty in finding ways to pack the molecules together on a lattice . The packing difficulty , inversely related to entropy , increases so severely as temperature is lowered that it ...
... entropy ) , there occurs a greater and greater difficulty in finding ways to pack the molecules together on a lattice . The packing difficulty , inversely related to entropy , increases so severely as temperature is lowered that it ...
Page 156
... entropy of mixing , respectively . The enthalpy of mixing depends on the strength of unlike 1-2 contacts in the ... entropy contributions be- tween small and large molecules . It is obvious that a mixture is more " disordered " than the ...
... entropy of mixing , respectively . The enthalpy of mixing depends on the strength of unlike 1-2 contacts in the ... entropy contributions be- tween small and large molecules . It is obvious that a mixture is more " disordered " than the ...
Page 157
... entropy de- pends on the number of molecules in the system . When high - molecular - weight pol- ymers are mixed , the combinatorial entropy becomes relatively unimportant and the main cause of solubility for small molecules is no ...
... entropy de- pends on the number of molecules in the system . When high - molecular - weight pol- ymers are mixed , the combinatorial entropy becomes relatively unimportant and the main cause of solubility for small molecules is no ...
Contents
Preface | 5 |
Application of Radiothermoluminescence to the Study | 6 |
1 | 11 |
Copyright | |
11 other sections not shown
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Common terms and phrases
absorption activation energy amorphous annealing atactic atoms bleaching blend changes charge Charlesby Chem chemical chemically trapped components concentration constant copolymer cross-linking crystal crystalline decay decrease depends dielectric dipoles distribution dose effect electron affinity electron traps electron-spin resonance emission entropy equilibrium excited molecules excited singlet first-order fluorescence free radicals free volume frequency factor glass glass-transition temperature glow curve glow peak increase INTENSITY relative units interaction interfacial intersystem crossing interzonal ionization irradiation isothermal kinetic light linear low temperatures luminescence luminescence centers LUMINESCENCE INTENSITY relative Macromolecules material maxima maximum mechanical method molecular motion molecules Nikolskii nuclear magnetic resonance observed occur oxygen phase phosphorescence Phys polar polybutadiene polyethylene samples polymer polypropylene quenching radiation radiothermoluminescence reactions recombination region relaxation transitions secondary relaxation semicrystalline Solprene spectra spectroscopy spectrum structure thermal thermodynamic thermoluminescence thermoluminescence intensity thermoluminescence peaks tion transition temperature trapped electrons triplet untrapping vibrational vulcanization whereas
References to this book
Polymer Surfaces and Interfaces II, Volume 2 W. J. Feast,H. S. Munro,R. W. Richards Snippet view - 1993 |