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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 14, Number 1
JKCSEZ 14(1)
February 20, 1970 

Synthesis of Methylmethacrylate / acrylonitrile Organosol Copolymer
Youngok Ahn

Characterization of MMA/AN organosol copolymer and subsequent comparison with the prior art latex copolymers has been accomplished. By means of NMR analyses, we found both types of copolymers to be random. The GPC analyses show that the organosol copolymers have a significantly broader MW spread than latex copolymers. This is due to the low MW stabilizer which is present as a physical mixture. As a result, the MW distribution is bimodal. Fractionation of a typical organosol copolymer yields a low MW(33,000-100,000), MMA rich fraction and a high MW (250,000-330,000), AN rich fraction. Solubility-wise, the organosol copolmyers are readily soluble in the lacquer solvent MEK to give a colorless film. The prio rart copolymers, however, were incompletely soluble and gave yellow, hazy film.
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