✦ LIBER ✦

Extrusion, spinning and injection moulding of blends of poly(ethylene terephthalate) with liquid crystalline polymers

✍ Scribed by F.P. La Mantia; F. Cangialosi; U. Pedretti; A. Roggero

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 883 KB
Volume: 29
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(93)90127-2

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✦ Synopsis

Blends of poly(ethylene terephthalate) (PET) and two different types of liquid crystalline polymers (LCP) have been prepared with different processing operations and characterized. The processability of PET improves in'all processing operations by adding small amounts of LCP. Both melt and solid properties of the blends seem mainly to depend on the ratio between the viscosity of the matrix and that of the LCP. Indeed, fibrillation of the LCP particles, and then the improvement of the mechanical properties, is possible only when the viscosity of the LCP is lower than that of the flexible matrix, also in elongational flow. The adhesion between matrix and LCP particles depends on the structure of the LCP. The presence of flexible spacers in the chain of the LCP improves the adhesion with the thermoplastic matrix.

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