Mechanisms of Photophysical Processes and Photochemical Reactions in Polymers: Theory and ApplicationsDuring the last two decades, photophysical and photochemical processes have become increasingly important in many branches of polymer chemistry. Tremendous advances have been made in our understanding of the theory of photoreactions and they now have many practical applications in, for example, the synthesis of photoresists for microcircuitry, polymers for xerography, photocuring of paints and resins, photodegradation and photodestabilization of polymers. |
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Page 110
... Temperature on Excimer Formation Excimer formation is observed in polymer films from very low temperatures ( liquid helium temperatures ) 1173 up to a temperature of 100 ° C.1558 The temperature dependence of excimer formation differs ...
... Temperature on Excimer Formation Excimer formation is observed in polymer films from very low temperatures ( liquid helium temperatures ) 1173 up to a temperature of 100 ° C.1558 The temperature dependence of excimer formation differs ...
Page 166
... temperature ( Fig . 4.20 ) .3406 The decrease in phosphorescence with increasing temperature must therefore be attributed to the discontinuous increase of some non - radiative processes included in the kNo term . The term ( kN ) may be ...
... temperature ( Fig . 4.20 ) .3406 The decrease in phosphorescence with increasing temperature must therefore be attributed to the discontinuous increase of some non - radiative processes included in the kNo term . The term ( kN ) may be ...
Page 354
... Temperature dependence of the photodimerization of anthryl groups and thermal dissociation at elevated temperatures ... temperature ( T ) and the threshold temperature of the thermal dissociation of the photodimer . By cooling to room ...
... Temperature dependence of the photodimerization of anthryl groups and thermal dissociation at elevated temperatures ... temperature ( T ) and the threshold temperature of the thermal dissociation of the photodimer . By cooling to room ...
Contents
Preface | 1 |
Figs 16 1 16 2 16 8 16 | 3 |
Electronic energy transfer processes | 33 |
Copyright | |
9 other sections not shown
Common terms and phrases
absorbed absorption absorption spectrum acceptor acetate acid acrylate alkyl amines aromatic ketones benzene benzoin benzophenone carbonyl group CH₂ CH3 CH3 charge-transfer Chem chemical chromophore compounds concentration copolymers crosslinking CT complex degradation dissociation donor effect efficiency electron emission energy migration energy transfer ether excimer excimer formation exciplex excited singlet excited triplet exciton film fluorescence intensity formed hydrogen abstraction hydroperoxide interaction intersystem crossing intramolecular ketone ketyl ketyl radical kinetics lifetime low molecular Macromolecules mechanism methyl methacrylate molecule monomer occurs oxidation peroxide phenyl phosphorescence Photocrosslinkable Photodegradation photoinitiate polymerization photoinitiators photolysis photon photooxidation photopolymerization photoreduction photosensitizers photostabilizers pigments polar poly(methyl methacrylate poly(vinyl chloride polymer polymer chain polymer matrix polystyrene produced quantum yield quencher quenching R₁ R₂ radiation rate constant reactive S₁ salts Section sensitizer solution solvent spectra spectrum stabilizers structure styrene Table temperature tetrahydrofurane thermal triplet state T₁ u.v. irradiation Wavelength nm