SYNTHESES AND CHARACTERIZATIONS OF HYPERBRANCHED POLYPHENYLENES
Article 2004 en
Authors
HP
Han Peng
HD
Hongchen Dong
YD
Yuping Dong
Abstract
1 min read
New hyperbranched polyphenylenes with high molecular weights are synthesized by the copolycyclotrimerizations of 1,4-diethynylbenzene (I) with phenylacetylene (A), 1-octyne (B), and 1-dodecyne (C) catalyzed by TaCl <sub>5</sub>-Ph<sub>4</sub>Sn. The polymers are completely soluble in common solvents such as toluene, THF, chloroform, and dichloromethane. The polymers are characterized by spectroscopic methods and all of the polymers give satisfactory analysis data corresponding to their expected molecular structures.
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