Accession Number : ADA248996


Title :   Molecular Engineering of Liquid Crystalline Polymers


Descriptive Note : Technical rept.,


Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE


Personal Author(s) : Percec, Virgil ; Tomazos, Dimitris


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a248996.pdf


Report Date : 27 Mar 1992


Pagination or Media Count : 218


Abstract : This chapter reviews the molecular engineering of main chain and side chain liquid crystalline polymers. Several factors influencing the phase transitions of liquid crystalline polymers are critically discussed. These include thermodynamics of phase transitions, isomorphism of liquid crystals, rigidity of rod-like mesogens and chemical heterogeneity of main chain liquid crystalline copolymers. The use of polyetherification and copolyetherification and of living cationic polymerization and copolymerization in the manipulation of phase transitions of liquid crystalline polymers is extensively discussed. This review also discusses several novel architectures such as liquid crystalline dendrimers and cyclic oligomers, liquid crystalline polymers containing crown ethers and polypodants, electron donor-acceptor complexes of discotic liquid crystalline polymers, as well as, self-assemblying supramolecular liquid crystalline polymers.


Descriptors :   *LIQUID CRYSTALS , *POLYMERS , PHASE TRANSFORMATIONS , THERMODYNAMICS , POLYMERIZATION , MOLECULAR WEIGHT , ANHYDRIDES , COPOLYMERS , CRYSTALS , PHASE , ELECTRONS , ENGINEERING , CHAINS , ETHERS , HETEROGENEITY , MACROMOLECULES , ELECTRON DONORS , TRANSITIONS , RODS , ESTERS , RIGIDITY , METASTABLE STATE , OLIGOMERS , POLYPHENYLENES , COPOLYMERIZATION , CHEMICALS , LIQUIDS


Subject Categories : Polymer Chemistry
      Crystallography
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE