Post extrusion hot drawing of polycarbonate/liquid crystalline polymer blends

Autor:	S. Kenig, Moshe Narkis, D. Beery, Arnon Siegmann
Rok vydání:	1996
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Liquid crystalline Modulus General Chemistry Polymer Protein filament chemistry visual_art Materials Chemistry visual_art.visual_art_medium Extrusion Polymer blend Composite material Polycarbonate Elastic modulus
Zdroj:	Polymer Engineering & Science. 36:229-236
ISSN:	1548-2634 0032-3888
DOI:	10.1002/pen.10407
Popis:	The post extrusion hot drawing of polycarbonate/liquid crystalline polymer (PC/LCP) blends, over the entire composition range, was studied. The extruded filament morphology and elastic modulus were followed as a function of blends composition, initial phase morphology, and draw ratio (DR). Hot drawing was found to cause further orientation to the already existing partially oriented LCP phase at the die exit, as reflected by the increased blends modulus. The additional orientation depends on the initial filaments structure, the blend composition, and the DR. Moreover, the orientability of the LCP phase is much higher, similar to that of neat LCP, for blends in which the LCP forms the continuous phase. In low LCP content blends, a critical DR was identified, beyond which the LCP fibrils undergo fragmentation and voids at the fibrils /matrix interface are formed, resulting in a decrease in the drawn filament modulus.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::99617cbb61a5311f40fe0694853d6bb0 https://doi.org/10.1002/pen.10407 Zobrazit plný text záznamu Plný text