ISSN:
0449-2951
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A study of the radical polymerization of styrene initiated by nickel peroxide (Ni-PO) as a solid initiator has been made. The rate of polymerization (Rp) was found to be expressed by the equation: Rp = k[Ni-PO]1/2[Styrene]3/2. This equation could be understood by considering that the radical polymerization by Ni-PO is initiated through the interaction between the monomer and the Ni-PO initiator and terminated by the ordinary bimolecular termination mechanism. By extracting the resulting polystyrene with methyl ethyl ketone (MEK), the MEK-insoluble polymer, which was confirmed by infrared spectra and x-ray diffraction analyses to be isotactic polystyrene, was isolated. The amount of the isotactic polymer increased as the polymerization temperature decreased. The results obtained in the present study indicate that the stereospecific absorption (π-complex formation) of the monomer on the solid Ni-PO initiator might be important for producing an isotactic polystyrene.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1965.100031002
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