Strong liquid-crystalline polymeric compositions

Patent · Tue Dec 07 00:00:00 EST 1993

OSTI ID:5436992

Dowell, F

Strong liquid-crystalline polymeric (LCP) compositions of matter are described. LCP backbones are combined with liquid crystalline (LC) side chains in a manner which maximizes molecular ordering through interdigitation of the side chains, thereby yielding materials which are predicted to have superior mechanical properties over existing LCPs. The theoretical design of LCPs having such characteristics includes consideration of the spacing distance between side chains along the backbone, the need for rigid sections in the backbone and in the side chains, the degree of polymerization, the length of the side chains, the regularity of the spacing of the side chains along the backbone, the interdigitation of side chains in sub-molecular strips, the packing of the side chains on one or two sides of the backbone to which they are attached, the symmetry of the side chains, the points of attachment of the side chains to the backbone, the flexibility and size of the chemical group connecting each side chain to the backbone, the effect of semiflexible sections in the backbone and the side chains, and the choice of types of dipolar and/or hydrogen bonding forces in the backbones and the side chains for easy alignment. 27 figures.

• DOE Contract Number: W-7405-ENG-36
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5268584; A
• OSTI ID: 5436992
• Resource Relation: Patent File Date: 5 Jun 1992
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
LIQUID CRYSTALS
MOLECULAR STRUCTURE
SYNTHESIS
POLYMERS
CHEMICAL COMPOSITION
CHEMICAL ENGINEERING
CRYSTALS
ENGINEERING
FLUIDS
LIQUIDS
400201* - Chemical & Physicochemical Properties
360602 - Other Materials- Structure & Phase Studies