The Relationship Between the Microstructure and Physical Properties of Injection Molded Naphthalenic-Based Liquid Crystal Copolyester |
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| Authors: | Esa Suokas Juha Sarlin Pertti Tömälä |
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| Institution: | Tampere University of Technology , P.O Box 527, Finland |
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| Abstract: | Holding pressure was expected to change the free flow of the liquid crystalline melt. Because of the complex mold used and the two variables, nozzle and mold temperature, the shear and elongational flow were in the injection molding study evaluated by means of the notched Charpy and Izod impact strength. The tensile modulus, the flexural strength and modulus mainly depended on the elongational flow induced skin. On the grounds of the microstructure composed of 4 distinct layers a free flow model of the liquid crystal polymer having a yield stress is proposed. |
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| Keywords: | liquid-crystal films smectic-A′ phase orientational epitaxy |
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