Electrolysis: processes – compositions used therein – and methods – Product produced by electrolysis involving electrolytic...
Patent
1993-06-22
1995-11-14
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Product produced by electrolysis involving electrolytic...
204 72, 428626, 428457, 428458, C25B 300
Patent
active
054663571
ABSTRACT:
In accordance with the present invention, electropolymerization in a substantially aqueous solution is used to form thick (e.g. greater than 2 microns or 30 weight %) and thermally stable coatings of thermoplastic materials onto electrically conductive filler materials (e.g. rods, plates, fibers). In a first preferred embodiment, the thick thermoplastic matrix comprises a copolymer of 3-carboxyphenyl maleimide and styrene. In a second preferred embodiment, cyclic (and preferably aromatic) N-substituted methacrylamide monomers are electropolymerized onto electrically conductive (e.g., graphite) filler (e.g., fibers, plates, film or cloth) to form a novel polymer composite exhibiting high Tg as well as a controlled degree of cross-linking which can prevent flow at high temperature. This invention is particularly well suited for direct preparation of thermoplastic prepregs containing commercially available bundles of graphite fibers. These prepregs are then molded under heat and pressure so as to form a thermoplastic matrix composite with good fiber distribution, uniformity and high temperature resistance.
REFERENCES:
Subramanian et al. "Electropolymerization on Graphite Fibers", Polymer Eng. & Science, vol. 18, No. 7, May 1978, pp. 590-600.
Bell James P.
Iroh Jude O.
Liang Jengli
Scola Daniel A.
Mayekar Kishor
Niebling John
The University Of Connecticut
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