Structural modifications of poly(1,4-phenylenevinylene) to soluble, fusible, liquid-crystalline products

Titelangaben

Martelock, Heidi ; Greiner, Andreas ; Heitz, Walter:
Structural modifications of poly(1,4-phenylenevinylene) to soluble, fusible, liquid-crystalline products.
In: Die Makromolekulare Chemie. Bd. 192 (1991) Heft 4 . - S. 967-979.
ISSN 0025-116X
DOI: https://doi.org/10.1002/macp.1991.021920419

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Abstract

The synthesis, solubility, and thermal behavior of soluble, fusible, liquid-crystalline derivatives of poly(1,4-phenylenevinylene) (1) is described. The improved solubility and fusibility were accomplished by reducing interchain interactions without change of the rigid rod-like character. The interchain interactions were lowered by decreasing the structural regularity of the repeating units. The synthesis of derivatives of 1 was accomplished by the palladium-catalyzed coupling of dihalogenoarenes and ethylene to avoid cis-vinylene units. Irreversible crosslinking was observed from fusible products on annealing above the softening point.