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SYNTHESES AND CHARACTERIZATIONS OF HYPERBRANCHED POLYPHENYLENES |
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| Authors: | Han Peng Hong-chen Dong Yu-ping Dong De-min Jia Ben-zhong Tang |
| Institution: | a.Institute of Material Science and Engineering; South China University of Technology; Guangzhou 510641; China b.Department of Chemistry; The Hong Kong University of Science & Technology; Clear Water Bay; Kowloon; Hong Kong; China |
| Abstract: | 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 TaCl5-Ph4Sn. 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. |
| Keywords: | Alkyne polycyclotrimerization Hyperbranched polymers Polyphenylenes |
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