Cationic bulk polymerization of vinyl ethers in the liquid crystalline phase
作者:
Haakan Jonsson,
Virgil Percec,
Ulf W. Gedde,
Anders Hult,
期刊:
Makromolekulare Chemie. Macromolecular Symposia
(WILEY Available online 1992)
卷期:
Volume 54-55,
issue 1
页码: 83-94
ISSN:0258-0322
年代: 1992
DOI:10.1002/masy.19920540110
出版商: Hüthig&Wepf Verlag
数据来源: WILEY
摘要:
AbstractCationic bulk polymerization of liquid crystalline phenyl benzoate and biphenyl vinyl ethers was performed using either thermal or photochemical initiation by onium salts. High molecular mass polymers having narrow molecular mass distribution were produced in high yields at very high temperatures (i.e., ≤ 120°).Seemingly, the polymerization system could stabilize the growing species and thus reduce the amount of chain transfer reactions. Thin films of the monomers were oriented in their liquid crystalline state by the use of conventional ordering techniques used for low molar mass liquid crystals. On subsequent polymerization the orientation was preserved giving liquid crystalline thin films having a very high degree of ord
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