Blend of flexible coil polymer and thermotropic liquid...

Details Blend of flexible coil polymer and thermotropic liquid... Blend of flexible coil polymer and thermotropic liquid...

C - Chemistry, Metallurgy

08

L

C08L 67/00 (2006.01) C08L 67/02 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2113114

2113114 9301238 PCTABS00019 Novel segmented block copolymers comprising mesogenic (or ''rod'') blocks and flexible coil polymer blocks are disclosed which are especially adapted to be blended with a substantially similar flexible coil polymer matrix to improve the mechanical properties of the flexible coil matric. For example, blends of poly(butylene terephthalate) (PBT) with a liquid crystalline block copolymer, poly(tetramethylene 4,4'-terephthaloyldioxydibenzoate)-b-poly(butylene terephthalate) (LCP-b-PBT) were prepared by precipitation from a common solvent, dried, and melt extruded through a capillary die to produce a monofilament. In all blends, the LCP-b-PBT domains were less than 0.1 µm in size and ultrafinely and uniformly dispersed. Even though the blends were only moderately elongated into fibrils, interfacial adhesion between the LCP-b-PBT and the pure PBT appeared excellent.

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