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Polymerization activity test for methyl methacrylate
Author(s) -
Georgieff K. K.
Publication year - 1964
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1964.070080133
Subject(s) - benzoyl peroxide , hydroquinone , methyl methacrylate , monomer , polymerization , diphenylamine , polymer chemistry , peroxide , chemistry , catalysis , materials science , organic chemistry , polymer
Two activity (polymerization) tests have been developed for evaluating the purity of methyl methacrylate industrially. A 10‐ml. portion of monomer is heated with 0.0400 g. of benzoyl peroxide in a test tube immersed in a bath at 101.2°C., until a spontaneous boil occurs. The effect of temperature, catalyst concentration, oxygen, barometric pressure, and weighing errors on the reproducibility of the test were studied. The inhibition factors for divinylacetylene, hydroquinone, p‐tert ‐butylcatechol, and diphenylamine were determined. A second test in which 20 g. of monomer and 0.400 g. of benzoyl peroxide are brought to a spontaneous boil in a round‐bottomed flask heated with a Glass‐Col mantle was also developed. However, the sensitivity of this test to inhibitors and stabilizers was much lower than that of the test tube test.