Liquid Crystalline Thermosets from Ester, Ester-imide, and Ester-amide Oligomers
United States: NASA Center for Aerospace Information (CASI), 2009
Online
report
Main chain thermotropic liquid crystal esters, ester-imides, and ester-amides were prepared from AA, BB, and AB type monomeric materials and end-capped with phenylacetylene, phenylmaleimide, or nadimide reactive end-groups. The end-capped liquid crystal oligomers are thermotropic and have, preferably, molecular weights in the range of approximately 1000-15,000 grams per mole. The end-capped liquid crystaloligomers have broad liquid crystalline melting ranges and exhibit high melt stability and very low melt viscosities at accessible temperatures. The end-capped liquid crystal oli-gomers are stable forup to an hour in the melt phase. They are highly processable by a variety of melt process shape forming and blending techniques. Once processed and shaped, the end-capped liquid crystal oigomers were heated to further polymerize and form liquid crystalline thermosets (LCT). The fully cured products are rubbers above their glass transition temperatures.
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Liquid Crystalline Thermosets from Ester, Ester-imide, and Ester-amide Oligomers
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Autor/in / Beteiligte Person: | Dingemans, Theodorus J ; Weiser, Erik S ; St. Clair, Terry L |
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Veröffentlichung: | United States: NASA Center for Aerospace Information (CASI), 2009 |
Medientyp: | report |
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