ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Isotactic polyproplyene has been peroxidized in the solid state by treatment with ozone at room temperature, eventually followed by treatment with oxygen at 100°C. The total active oxygen content - peroxides and hydroperoxides - was determined iodometrically, and the hydroperoxide content with triethyl arsine, following the method of Horner and Jürgens. Post-treatment with oxygen causes a very strong increase in total active oxygen content; the relative amount of hydroperoxides compared with that without oxygen treatment is, however, markedly decreased. The stability and rate of decomposition of PPO2 have been considered in relation to the solubility parameter of the different monomers and solvents. It was used at 30-40°C for initiating the emulsion polymerization of styrene, methyl-, and butyl methacrylate and methyl, ethyl, n-butyl, and 2-ethyl-hexyl acrylate. These polymers contain an average number of peroxide links per macromolecule, ranging between 7 and 23; they can be used for the block polymerization of a second vinyl monomer, e.g., vinyl chloride.
Additional Material:
8 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1978.170161203
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