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. |
From inside the book
Results 1-3 of 46
Page 104
... kinetic analysis of excimer formation and dissociation presented in Table 3.4 and Fig . 3.20 can be employed as a model for kinetic consideration of the formation and decay of polystyrene and poly ( a - methylstyrene ) excimers . 1290 ...
... kinetic analysis of excimer formation and dissociation presented in Table 3.4 and Fig . 3.20 can be employed as a model for kinetic consideration of the formation and decay of polystyrene and poly ( a - methylstyrene ) excimers . 1290 ...
Page 177
... KINETIC CHAIN LENGTH , i.e. the number of monomer units consumed per free radicals is given by : Rp KINETIC CHAIN LENGTH = R1 = kp [ M ] 2 ( k , k , ) 1/2 [ 1 ] 1 / 2 ( 5.33 ) In the absence of any side reactions , the kinetic chain ...
... KINETIC CHAIN LENGTH , i.e. the number of monomer units consumed per free radicals is given by : Rp KINETIC CHAIN LENGTH = R1 = kp [ M ] 2 ( k , k , ) 1/2 [ 1 ] 1 / 2 ( 5.33 ) In the absence of any side reactions , the kinetic chain ...
Page 179
... kinetics deviation from normal photopolymerization kinetic orders has been observed which can be attributed to primary radical or photoproduct termination interactions with growing polymer radicals . 3274 , 3275 The low kinetic order in ...
... kinetics deviation from normal photopolymerization kinetic orders has been observed which can be attributed to primary radical or photoproduct termination interactions with growing polymer radicals . 3274 , 3275 The low kinetic order in ...
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