6533b7d0fe1ef96bd125a18f
RESEARCH PRODUCT
Characterization of blends of polypropylene with a semirigid liquid-crystal copolyester
U. PedrettiA. RoggeroAntonino ValenzaYe YongchengF. P. La MantiaV. Cittàsubject
PolypropyleneMaterials sciencePolymers and PlasticsOrganic ChemistryGeneral Physics and AstronomyYoung's modulusThermotropic crystalchemistry.chemical_compoundViscositysymbols.namesakeRheologychemistryLiquid crystalMaterials ChemistrysymbolsPolymer blendComposite materialElastic modulusdescription
Abstract Blends with a liquid-crystal polymers (LCP) as one component show, in general, very interesting properties. Reduction of shear viscosity and improvement of mechanical properties are very remarkable. High melting temperatures and high costs of the LCP limit the use of these blends. A new class of thermotropic LCPs with flexible spaces, with relatively low melting temperatures, can overcome the first problem. In this work, rheological and mechanical properties of blends of polypropylene with low contents of this LCP are presented. Torque during extrusion and viscosity decrease with LCP content. Elastic modulus is remarkably increased when the LCP phase is oriented.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1991-01-01 | European Polymer Journal |