6533b828fe1ef96bd1288622
RESEARCH PRODUCT
Synthesis, properties and processability of a new class of semirigid liquid crystalline copolyesteramides
V. CittàU. PedrettiPierluigi MagagniniFrancesco Paolo La MantiaEnrico Montanisubject
chemistry.chemical_classificationMaterials scienceCondensation polymerMolar concentrationSebacic acidHydrogen bondPolymerCondensed Matter PhysicsPolyesterchemistry.chemical_compoundchemistryUltimate tensile strengthPolymer chemistryMacromoleculedescription
Abstract A new family of semirigid main chain liquid crystalline polymers (LCPs), referred to as SBAN, characterized by fairly good processability and mechanical properties, and improved thermal resistance, have been synthesized by the melt polycondensation of sebacic acid (S), 4,4′-dihyhxybiphenyl (B), 4-aminobenzoic acid (A), and 2-hydroxy-6-naphthoic acid (N), in a wide range of compositions. The molar concentration of the A ahd N units, in these LCPs must be kept lower than ca 40 and 60%, respectively, in order to avoid the formation of homopolymeric blocks, which impair spinnability. The presence of A units grants the formation of hydrogen bonds between neighboring macromolecules, and this leads to higher tensile moduli and improved thermal resistance, with respect to analogous semirigid LC polyesters.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-06-01 |