Self reinforced thermoplastic composite laminate
First Claim
1. A self reinforced composite laminate formed from a plurality of layers of a blend of thermotropic liquid crystal polymers having overlapping processing temperature ranges, said liquid crystal polymers including a first liquid crystal polymer and a second liquid crystal polymer which are incompatible in the solid state, each layer comprising fibers of said second liquid crystal polymer in a matrix of said first liquid crystal polymer, wherein the second liquid crystal polymer has a higher minimum processing temperature than the first liquid crystal polymer and wherein the said blend contains from about 2% to about 98% by weight each of said first and second liquid crystal polymers, based on the total liquid crystal polymer weight in said blend.
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Abstract
Composite laminates are prepared from thin sheets of thermotropic liquid crystal polymer blends. A preferred blend contains 2 thermotropic liquid crystal polymers, i.e., a first liquid crystal polymer in LCP-1, and a second liquid crystal polymer (LCP-2), the second liquid crystal polymer having a higher melting point than the first. The second liquid crystal polymer is molecularly oriented and is preferably at least partially in the form of microscopic fibers in a matrix of the first liquid crystal polymer. The two liquid crystal polymers are phase separated in the solid phase and have overlapping melt processing temperatures.
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Citations
9 Claims
- 1. A self reinforced composite laminate formed from a plurality of layers of a blend of thermotropic liquid crystal polymers having overlapping processing temperature ranges, said liquid crystal polymers including a first liquid crystal polymer and a second liquid crystal polymer which are incompatible in the solid state, each layer comprising fibers of said second liquid crystal polymer in a matrix of said first liquid crystal polymer, wherein the second liquid crystal polymer has a higher minimum processing temperature than the first liquid crystal polymer and wherein the said blend contains from about 2% to about 98% by weight each of said first and second liquid crystal polymers, based on the total liquid crystal polymer weight in said blend.
Specification