Analysis of Boron Trifluoride in Organic Liquids (Ethers)

Walters, Sandra L.; Miller, Roy R.

doi:10.1021/i560158a021

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1954

1966

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Vinyl polymerization. III. Polymerization of acenaphthylene

Imoto¹,

Takemoto²

1955

J. Polym. Sci.

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Polymerization of acenaphthylene by boron trifluoride‐ether complex as catalyst was carried out in benzene solution of various concentrations of the catalyst over a range of temperatures from 20 to 50°C. Over‐all rate of the polymerization was found to be of the first order both for the initial concentration of the monomer and for that of the catalyst: Activation energy required in the reaction was calculated to be 12.5 kcal./mole, and the molecular weight of polymers measured by the Gee osmometer was shown to be of the same order as found by previous workers.

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Vinyl polymerization. III. Polymerization of acenaphthylene

Imoto¹,

Takemoto²

1955

J. Polym. Sci.

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Homopolymerization of 2‐alkyl‐ and 2‐aryl‐2‐oxazolines

Tomalia

Sheetz

1966

J. Polym. Sci. A‐1 Polym. Chem.

253

172

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synopsis 2-Aryl-and Zalkyl-Zoxazolines have been polymerized to poly-(N-aroy1)aziridnes and poly(N-acyl)aziridines, respectively, in the presence of boron trifluoride. The polymers obtained were glassy, light yellow resins with molecular weights ranging from 3500 to 7500 (35-50 oxazoline units per chain). The polymerization rates have been determined for several of these monomers. A polymerization mechanism is proposed.Recently it was shown that a number of exo-imino cyclic compounds such as ethylene iminocarbonates (I) and 2-iminotetrahydrofuran (11) undergo a Received December 22, 1965 Prod. No. 5088A

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