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RESEARCH PRODUCT
Melt spinning and mechanical properties of semirigid liquid-crystal copolyesters
A. RoggeroAntonino ValenzaU. PedrettiF. P. La MantiaV. Cittàsubject
chemistry.chemical_classificationMaterials sciencePolymers and PlasticsMelting temperaturePolymerCondensed Matter PhysicsThermotropic crystalchemistryLiquid crystalUltimate tensile strengthMechanical strengthMaterials ChemistryPhysical and Theoretical ChemistryComposite materialMelt spinningdescription
Melt-spinning and mechanical properties of fibers of a new class of semirigid thermotropic liquid-crystal polymers are presented. These copolyesters are synthesized from 4-4′-dihydroxybiphenyl (B), 4-hydroxybenzoic acid (H), and flexible units provided by aliphatic diacids. The flexible units depress the melting temperature without strongly depressing the mechanical properties. These liquid-crystal polymers can be easily spun at high draw ratios. Indeed, unlike rigid liquid-crystal polymers, relatively high draw ratios are needed to attain high mechanical strength. Tensile moduli of about 28 GPa and tensile strengths of about 350 MPa are obtained. © 1993 John Wiley & Sons, Inc.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-07-01 | Journal of Polymer Science Part B: Polymer Physics |