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A Comparative Study of In-situ Composite Fibers Reinforced with Different Rigid Liquid Crystalline Polymers by Lihua Pan; Borun Liang is a Materials Science article available to read on EtoBox.

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Poly(ethylene terephthalate) (PET) and 2 thermotropic liquid crystalline polymers (LCPs) with different chain rigidity were blended to make in-situ composite fibers on a conventional melt spinning equipment. The addition of the LCP-1 (60PHB-PET) with a less rigid chain has been found to lower the orientation of the as-spun fibers while the LCP-2 (VectraA900) with whole aromatic rigid chain has a reverse effect, as evidenced from the birefringence results. Both kinds of composite fibers with 5 wt % LCP have a good drawability. There is a diffraction peak characteristic of intermolecular packing of LCP on the wide-angle X-ray diffraction curve for the as-spun fibers containing LCP-2 but not the case for LCP-1. The morphology formed during elongational flow is highly dependent on the composition and rigidity of LCP. For the dispersed phases of LCP-1, it is relatively difficult to be elongated, whereas LCP-2 dispersed phases will be easily deformed into fibrils during melt spinning. The mechanical properties of the blend fibers containing the LCP-1 component are inferior to those containing the LCP-2 component. For the fibers with discontinuous fibril morphology, a Halpin-Tsai equation

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Author

Lihua Pan; Borun Liang

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0021-8995)

Published

1998

Language

EN

Field

Materials Science (Physical Sciences)