Blow Molding of Thermotropic Liquid Crystalline Polymers
-
K. G. Blizard
Abstract
The process of extrusion blow molding was considered in an attempt to obtain biaxial orientation and properties in two thermotropic copply esters: hydroxybenzoic acid/polyethylene terephthalate (HBA/PET) and hydroxybenzoic acid/6-hydroxy-2-naphthoic acid (HBA/HNA). Some degree of biaxial properties and orientation was obtained in blow molded samples in which the die temperature was maintained below the melting temperature. However, the biaxial orientation was present as a layered structure in which the orientation and texture varied from the outside to the inside surface of the blow molded article. Tensile and flexural properties, as well as the morphology and orientation as determined by scanning electron microscopy (SEM) and x-ray diffraction (WAXS), attested to the resulting structure in the blown parison. The orientation and properties were strongly dependent on the thermal and deformation histories during the process. For liquid crystal polymers with relatively slow crystallization kinetics, blow molding in the supercooled state represents a possible processing method to obtain multidimensional properties.
© 1989, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Prediction of Birefringence for Optical Memory Disk
- Transient Compressible Flow in Injection Molding Runner**
- Advances in Rheological Analysis of Injection Molding
- Optical and Mechanical Measurements to Characterize Injection Molded Polypropylene Plates
- Experimental Investigation of Rotational Molding and the Characterization of Rotationally Molded Polyethylene-Parts
- Blow Molding of Thermotropic Liquid Crystalline Polymers
- Position of Neutral Surface during Hollow Disk Compression Molding of Long Fibre-Reinforced Thermoplastics**
- Reactive Ion Etching of Polymer Films
- Fabrication of Microstructures of Extreme Structural Heights by Reaction Injection Molding
- Rheological Properties of Glass Fiber Filled Nylon 6 Composite System
Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Prediction of Birefringence for Optical Memory Disk
- Transient Compressible Flow in Injection Molding Runner**
- Advances in Rheological Analysis of Injection Molding
- Optical and Mechanical Measurements to Characterize Injection Molded Polypropylene Plates
- Experimental Investigation of Rotational Molding and the Characterization of Rotationally Molded Polyethylene-Parts
- Blow Molding of Thermotropic Liquid Crystalline Polymers
- Position of Neutral Surface during Hollow Disk Compression Molding of Long Fibre-Reinforced Thermoplastics**
- Reactive Ion Etching of Polymer Films
- Fabrication of Microstructures of Extreme Structural Heights by Reaction Injection Molding
- Rheological Properties of Glass Fiber Filled Nylon 6 Composite System
