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Polymerization of Isobutylene Initiated by Laser Vaporization of Metal Targets

Published online by Cambridge University Press:  01 January 1992

Walter Vann ,
George M. Daly  and
M. Samy El-shall
Walter Vann
Affiliation:
Department of Chemistry, Virginia Commonwealth University Richmond, VA 23284–2006
George M. Daly
Affiliation:
Department of Chemistry, Virginia Commonwealth University Richmond, VA 23284–2006
M. Samy El-shall
Affiliation:
Department of Chemistry, Virginia Commonwealth University Richmond, VA 23284–2006
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Abstract

A novel technique involving the initiation of polymerization using laser vaporization of metal targets is being explored. In the experiment, metal ions such as Ti+, Zr+, Ag+ are generated in the gas phase by pulsed laser vaporization/ionization of a metal target using the second harmonic of a Nd:YAG laser (532 nm). The ions are pulled toward a monomer liquid(isobutylene which can only be polymerized by cationic mechanisms) by applyingappropriate electric fields across the reaction chamber. Under different experimentalconditions (temperature, pressure of a carrier gas, laser energy, electric field strength, reaction time) different polymeric products (viscous liquids or solids) were obtained with average molecular weights ranging from 200 to greater than 106. Full characterization of these materials is currently in progress. This technique could lead to a powerful approach for the synthesis of a wide variety of polymeric materials with unique properties such as stability, strength and photo and electrical conductivity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 285: Symposium I – Laser Ablation in Materials Processing–Fundamentals and Applications , 1992 , 593
Copyright
Copyright © Materials Research Society 1993

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References

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