Coinjection Molded Pregenerated Microcomposites

Abstract

This work was concerned with the coinjection molding of poly(ethylene terephthalate) (PET) reinforced with regenerated thermotropic liquid crystalline polymer (TLCP) fibrils, where the TLCP (DuPont, HX1000) had a higher melt processing temperature than PET. A novel dual extrusion process was used to spin strands of PET reinforced with HX1000 fibrils. The strands were compression molded into cartridges and then coinjection molded to form plaques. In comparison to conventionally injection molded pregenerated microcomposites, coinjection molded composites had higher flexural moduli. The coinjection molded composites also had smoother surfaces than glass fiber-filled PET. It was determined that the best mechanical properties were achieved using a core of glass fiber-filled PET.

Keywords

coinjection molding regenerated microcomposites thermotropic liquid crystalline polymer composites

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