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Blends of PBT with rigid thermotropic LCP having flexible side groups: Comparison of their tensile properties with semirigid main-chain TLCP blends
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1996
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Different Lcp ContentsEngineeringMechanical EngineeringLcp ContentLiquid Crystalline ElastomerFlexible Side GroupsThermoplastic CompositeRigid Thermotropic LcpPolymersThermosetsPolymer MaterialTensile PropertiesPolymer ProcessingPolymer CompositesThermomechanical AnalysisPolymer ChemistryMaterials SciencePolymer BlendPolymer MeltPolymer SciencePolymer CharacterizationPolymer PropertyUltimate Tensile StrengthMechanics Of Materials
Two new thermotropic liquid crystalline polymers (LCPs) were synthesized. One is a di-mesogenic LCP having a flexible hexamethylene spacer in the main chain, the other is a rigid-type main-chain LCP having alkoxy side groups on the terephthaloyl moiety of the polymer. Blends of LCP with poly(butylene) terephthalate were melt-spun at different LCP contents and different draw ratios to produce a monofilament. Maximum enhancement in the ultimate tensile strength was observed for the blends containing 5% LCP at any draw ratio, and decreased with further increase in LCP content. The initial modulus monotonically increased with increasing LCP content. The tensile properties of the rigid-type LCP blends were higher than those of the flexible main-chain LCP blends. © 1996 John Wiley & Sons, Inc.