Über die polymerisation von 2,3-dihydropyran

6533b860fe1ef96bd12c2e55

RESEARCH PRODUCT

Über die polymerisation von 2,3-dihydropyran

Von Kosaku Kamio Rolf C. Schulz Werner Kern Klaus Meyersen

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Dihydropyran kann mit verschiedenen FRIEDEL-CRAFTS-Katalysatoren polymerisiert werden; am besten eignet sich Bortrifluorid-Atherat. Die Polymeren lassen sich in einen in Petrolather unloslichen und einen loslichen Anteil auftrennen. An Hand von IR-Spektren und chemischen Umsetzungen wird gezeigt, das neben Tetrahydropyran-Grundbausteinen auch solche mit freien Aldehydgruppen auftreten. Ein Ringoffnungsmechanismus wird diskutiert. Dihydropyran can be polymerized by means of various FRIEDEL-CRAFTS catalysts, the most effective being BF3 -etherate. The polymers can be separated into a petroleum ether-soluble and a petroleum ether-insoluble fraction. Infrared-spectra and chemical reactions show that besides tetrahydropyran units there also exist repeating units with free aldehyde groups. A ring opening mechanism is discussed.

year	journal	country	edition	language
1966-01-10	Die Makromolekulare Chemie

https://doi.org/10.1002/macp.1966.020900118

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