Q-sized CdS: Synthesis, characterization, and efficiency of photoinitiation of polymerization of several vinylic monomers

Journal Article · Thu Jun 25 00:00:00 EDT 1992 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100192a067· OSTI ID:457811

Hoffman, A J; Mills, G; Yee, H; Hoffmann, M R ^[1]

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1. California Inst. of Technology, Pasadena, CA (United States)

The effect of temperature, stirring, excess cadmium, solvent viscosity, and dielectric strength on Q-sized CdS semiconductors in nonaqueous solvents is examined. Q-sized semiconductors have higher photopolymerization quantum yields than bulk sized CdS, ZnO, and TiO{sub 2} and need hole scavenging by the solvent to occur. There is also a correlation between monomer reactivity toward polymerization and its Alfrey and Price Q and e values. There is also a correlation between semiconductor photoinitiation efficiency and conduction band electron reduction potential. Based on this, anionic initiation followed by free radical propogation has been proposed. 42 refs., 6 figs., 7 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 457811
• Journal Information: Journal of Physical Chemistry, Vol. 96, Issue 13; Other Information: PBD: 25 Jun 1992
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
36 MATERIALS SCIENCE
66 PHYSICS
CADMIUM SULFIDES
PHOTOCHEMICAL REACTIONS
POLYMERIZATION
SEMICONDUCTOR MATERIALS
ABSORPTION SPECTRA