Synthesis and Formation of a Supramolecular Nematic Liquid Crystal in Poly(p-phenylene−sulfoterephthalamide)−H2O

Autor:	Stephen J. Picken, Sebastien Viale, Adam S. Best, Nan Li, Anton H. M. Schotman
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Polymers and Plastics Chemistry Organic Chemistry Triphenyl phosphite Polymer Polyelectrolyte Inorganic Chemistry chemistry.chemical_compound Monomer Liquid crystal Poly(p-phenylene) Diamine Polymer chemistry Lyotropic Materials Chemistry
Zdroj:	Macromolecules. 38:3647-3652
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma0475636
Popis:	The formation of lyotropic solutions in water has yet to be reported for polyaramides. In this work, we investigate the synthesis and properties of a water-soluble polyaramid via the inclusion of a sulfonated monomer in the backbone of the polymer chain. Using sulfonated terephthalic acid (sTA) together with a diamine and a diisocyanate enables us to produce a lyotropic water-soluble polyaramid poly(p-phenylene−sulfoterephthalamide). Two different synthetic routes are presented: (1) the reaction between sTA and p-phenylene diisocyanate (PPDI) and (2) the reaction of activated sTA using triphenyl phosphite and p-phenylenediamine (PPD). Polymers with various molar masses up to 15 000 g mol-1 using both methods have been obtained. We have examined the optimal reaction conditions for the synthesis of these polymers, in particular the effect of reaction temperature, concentration of monomers and reactants, type of counterions, and solvents. The polymers obtained are mostly soluble in water, up to high concent...
Databáze:	OpenAIRE
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