Katherine A Shaffer

US Patent:

57805539, Jul 14, 1998

Filed:

Apr 30, 1997

Appl. No.:

8/846822

Inventors:

Joseph M. DeSimone - Chapel Hill NC
Timothy J. Romack - Durham NC
Dorian A. Canelas - Chapel Hill NC
Katherine A. Shaffer - Erie PA

Assignee:

University of North Carolina at Chapel Hill - Chapel Hill NC

International Classification:

C08F25900
C08F27500

US Classification:

525276

Abstract:

A method for the polymerization of a monomer is disclosed. The method includes (a) providing a reaction mixture comprising a monomer, a stabilizer precursor, and a polymerization initiator in a polymerization medium comprising carbon dioxide; and then (b) polymerizing the monomer and the stabilizer precursor in the polymerization medium to form a heterogeneous reaction mixture comprising a polymer in the polymerization medium. The stabilizer precursor is covalently bound the polymer to provide an intrinsic surfactant in the polymer, which stabilizes the polymer in the heterogeneous reaction mixture.