ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Inverse emulsion copolymerization studies of acrylamide (Am) with methacrylic acid (MAA) are reported. Aqueous monomer emulsions in toluene were prepared with a blend of two surfactants (sorbitan sesquioleate - Cl8 - terminated acrylamide oligomers). Polymerization kinetics in presence of an oil soluble initiator (AIBN) were determined at 40°C as function of MAA content and aqueous phase pH : monomer reactivity ratios have been derived as rAm = 0.58 ± 0.02, rMAA = 4.40 ± 0.10 at pH 4 and rAm = 0.56 ± 0.005, rMAA = 0.15 ± 0.03 at pH 10. Particle size and stability of inverse monomer emulsions and final latexes were found to depend upon the aqueous phase pH, as well as the intrinsic viscosities of the copolymers; this suggests differences in polymerization mechanism versus the pH.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1985.020101985116
