Photodegradation of Polymers: Physical Characteristics and ApplicationsIn this book on physical characteristics and practical aspects of polymer photodegradation Rabek emphasizes the experimental work on the subject. The most important feature of the book is the physical interpretation of polymer degradation, e.g. mechanism of UV/light absorption, formation of excited states, energy transfer mechanism, kinetics, dependence on physical properties of macromolecules and polymer matrices, formation of mechanical defects, practics during environmental ageing. He includes also some aspects of polymer photodegradation in environmental and space condition. |
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Page 100
... glass . Chain - scission of a low molecular weight poly- mer will plasticize more than a high molecular weight material . These ... glass 100 5 Physical Factors Which Influence Photodegradation Effect of the Glass Transition Temperature.
... glass . Chain - scission of a low molecular weight poly- mer will plasticize more than a high molecular weight material . These ... glass 100 5 Physical Factors Which Influence Photodegradation Effect of the Glass Transition Temperature.
Page 101
... glass transition ( Tg ) and crystalline melt transition ( Tm ) upon the specific volume of polymers Amorphous glass Super cooled liquid Δα Tg Crystalline solid Temperature- Tm Viscoelastic liquid mental motions are very rapid , whereas ...
... glass transition ( Tg ) and crystalline melt transition ( Tm ) upon the specific volume of polymers Amorphous glass Super cooled liquid Δα Tg Crystalline solid Temperature- Tm Viscoelastic liquid mental motions are very rapid , whereas ...
Page 136
... glass transition temperature ( Tg ) , the rates of diffusion of small molecules are only one or two orders of magnitude below those in ordinary liquids . In Table 7.1 diffusion activation energies of oxygen and other gases in polymers ...
... glass transition temperature ( Tg ) , the rates of diffusion of small molecules are only one or two orders of magnitude below those in ordinary liquids . In Table 7.1 diffusion activation energies of oxygen and other gases in polymers ...
Contents
Preface | 1 |
Electronically Excited States in Polymers | 9 |
Electronic Energy Transfer Processes in Polymers | 20 |
Copyright | |
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Other editions - View all
Photodegradation of Polymers: Physical Characteristics and Applications Jan F. Rabek Limited preview - 2012 |
Photodegradation of Polymers: Physical Characteristics and Applications Jan F. Rabek No preview available - 2011 |
Common terms and phrases
ablation absorption absorption spectrum acceptor molecules Allen NS amorphous and/or Appl Polym Sci bonds carbonyl CH₂ chemical chromophores chromophoric groups coefficient concentration crosslinking decrease density depolymerization diffusion dissociation donor and acceptor efficiency emission energy migration energy transfer process equation etching Europ Polym excimer excited donor excited singlet fluence fluorescence formation free radicals free volume hydrogen hydroperoxide increases initial interaction intersystem crossing irradiation ketone kinetics laser radiation lifetime Macromolecules main chain scission McKellar JF mechanism molecular weight molecule monomer occur oxidation photochemical photodegradation Photodegradation of Polymers photoinitiator photolysis Phys plastics po/qo poly poly(methyl methacrylate polyethylene polyimide Polym Degrad Stabil Polym Sci Chem polymer alkyl radical polymer chain polymer matrix polymeric material polypropylene polystyrene POOH quantum yield quenching radiation absorbed radiative energy transfer rate constant reaction reactive S₁ sample singlet oxygen solvent spin trap stress surface T₁ temperature tensile thermal triplet viscosity wavelength