Structural variations of liquid crystalline polymer macromolecules. Review

Sęk, Danuta

doi:10.1002/actp.1988.010391101

Cited by 7 publications

References 95 publications

(16 reference statements)

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Modelluntersuchungen zur topologie der härtung geordneter epoxidnetzwerke

Kirchmeyer

Müller

Dhein

et al. 1993

Angew. Makromol. Chem.

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ZUSAMMENFASSUNG:Die Hartung von 4-Phenyl-4-(2,3-epoxypropoxy)benzoat (I) rnit den isomeren Aminophenylaminobenzoaten I1 bis V fiihrt zu unterschiedlich geordneten Epoxidnetzwerken. Die Bildung verschiedener Intermediate wahrend der Hartungsreaktion wurde anhand von Modellverbindungen studiert. Aus der Reaktion der monoamino-substituierten Phenylbenzoate VI bis IX mit Epoxid wurden die Reaktionskonstanten fur die Addition an das primare und das sekundare Wasserstoffatom der Aminogruppen bestimmt. Die kinetischen Daten lassen sich fur eine schrittweise Simulation des Hartungsverlaufs verwenden. Es wurden Argumente dafur gefunden, da8 sich bei Verwendung der Amine mit 4-Aminobenzoat-Strukturen gut geordnete, schnell vernetzende Intermediate bilden. SUMMARY4-Phenyl-4-(2,3-expoxypropyl)benzoate (I) can be cured to thermoset networks with a different degree of order by using isomeric anlinophenyl aminobenzoates I1 to V as curing agents. The formation of intermediates during the curing reaction was studied by means of model compounds. From the reaction of the monoamino-substituted phenylbenzoates VI to IX the reactivities for the primary and the secondary aminoprotons towards epoxide was determined. The kinetic data were used for a stepwise simulation of the curing reaction. Arguments were found that in case of diamines with 4-aminobenzoate structure well ordered intermediates are formed, which crosslink in an early stage of the reaction.

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Modelluntersuchungen zur topologie der härtung geordneter epoxidnetzwerke

Kirchmeyer

Müller

Dhein

et al. 1993

Angew. Makromol. Chem.

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Rigid rod molecules as liquid crystal thermosets. I. Rigid rod amides

Hoyt¹,

Benicewicz²

1990

J. Polym. Sci. A Polym. Chem.

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A series of rigid rod amide monomers based on 2,2′‐disubstituted‐4,4′‐diaminobiphenyl were prepared and characterized by DSC and hot stage polarized light microscopy. The monomers were endcapped with maleimide, nadimide, and methylnadimide functionalities. With one exception, all of the materials could be thermally polymerized. Nematic liquid crystalline behavior was observed in three of the new materials which could be crosslinked in either the nematic or isotropic phase. Fast heating rates with hot stage polarized light microscopy were necessary to determine the melting and phase behavior before substantial crosslinking occurred during the heating process. One of the methylnadimide endcapped monomers also showed lyotropic liquid crystalline behavior.

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Characterization of Mesophases

Noël

1992

Liquid Crystal Polymers: From Structures to Applications

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Structural variations of liquid crystalline polymer macromolecules. Review

Cited by 7 publications

References 95 publications

Modelluntersuchungen zur topologie der härtung geordneter epoxidnetzwerke

Modelluntersuchungen zur topologie der härtung geordneter epoxidnetzwerke

Rigid rod molecules as liquid crystal thermosets. I. Rigid rod amides

Characterization of Mesophases

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