ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary The rare earth naphthenates of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, in combination with triethylaluminum, were investigated as catalysts for the polymerization of phenylacetylene. All were found, at least to a small degree, to be active, and produce atactic polyphenylacetylene showing the presence of both cis and trans double bonds in the chain. These polymers exhibited a low degree (∼ 28%) of crystallinity. However, the neodymium system produced a crystalline (45%) cis-cisoid polymer. An interesting, but as yet unexplained, correlation exists between activity of the catalyst, as indicated by yield of polymer obtained, and the number of f electrons on the metal.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00263231
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