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Flow behavior of LCP melts and its influence on morphology and mechanical properties of injection molded parts
Author(s) -
Nguyen T. N.,
Geiger K.,
Walther Th.
Publication year - 2000
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11296
Subject(s) - materials science , shearing (physics) , rheometer , composite material , capillary action , flow properties , mold , morphology (biology) , rheology , mechanics , physics , biology , genetics
The flow behavior of two commercial liquid crystalline polymers (LCP), Vectra B 950 and Vectra L 950 (Ticona GmbH), was investigated using a capillary rheometer with a new double slit die. The influence of pre‐shearing of the melt on its viscosity and the apparent geometry dependence of its flow behavior were analyzed. The dependence of flowability on the part was determined with a modular spiral mold in which the thickness of the channel was varied. The influence of processing parameters and part geometry on the mechanical properties and morphology of molded parts was also studied.