ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The consumption of primary mercaptans from C5 to C12, and of tertiary dodecyl mercaptan, has been studied during chloroprene polymerization. All of the primary mercaptans disappeared with the same rate constant as did the chloroprene monomer. Tertiary dodecyl mercaptan disappeared more slowly. Equal molar concentrations of different primary mercaptans gave similar intrinsic viscosity polychloroprenes at any specific monomer conversion. Polymerization rate and temperature were shown to have little effect on relative mercaptan consumption over the limited conditions employed. The mercaptans studied were shown to have only slight solubilities in aqueous base solutions. The observations led to the conclusion that the mercaptan consumption is not diffusion- or solubility-controlled, but depends upon the inherent reactivity of a mercaptan at the polymerization site.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1963.070070222
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