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UV Enhancement of Surface Catalytic Polymerization of Ethylene

Published online by Cambridge University Press:  25 February 2011

Parul Vora Purohit ,
Mordechai Rothschild  and
Daniel J. Ehrlich
Parul Vora Purohit
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, MA 02173
Mordechai Rothschild
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, MA 02173
Daniel J. Ehrlich
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, MA 02173
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Abstract

The polymerization of ethylene on surfaces sequentially dosed with TiC14 and trimethylaluminum was studied by Fourier transform infrared spectroscopy. The polymer film was observed in situ as a function of time and under the influence of 254-nm cw radiation. The rate of polymerization and the saturation thickness of the polyethylene are strongly dependent on the order of dosing and the partial pressures of the reactants that form the catalyst. UV enhancement of polymerization was demonstrated to occur through two separate photochemical channels: gas-phase photolysis of the reactants and solid-phase chemical transformation of a noncatalytic thin film.

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References

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