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M. Piątkowski, D. Bogdał, B. Ondruschka

RAPID COMMUNICATION
Microwave-assisted synthesis of poly(aspartic acid) (in English)

Polimery 2009, No 7/8, 573


Summary

The reactions of poly(aspartic acid) syntheses were carried out in the microwave reactor. The cyclic form obtained, i.e. polysuccinimide [PSI, formula(IV) in Scheme A] was then subjected to alkaline hydrolysis in the presence of NaOH to reach finally the linear form, sodium salt of poly(aspartic acid) (PAspNa) [formula (V) in Scheme A presents its anion]. D,L-aspartic acid being a monomer [formula (III)] was dispersed in propylene carbonate and polimerized without the catalyst at temp. 160-230° for 41min. The polymer obtained was precipitated with non-solvent, filtered and washed first with the same non-solvent and then with distilled water, and dried at room temperature. The effects of weight ratio monomer:solvent and the type of non-solvent on the reaction yield and molecular weight and polydispersity of the product were investigated changing the parameters mentioned.


Key words: poly(aspartic acid), polysuccinimide, microwave radiation


e-mail: mpiatkowski@indy.chemia.pk.edu.pl


M. Piątkowski, D. Bogdał, B. Ondruschka

Microwave-assisted synthesis of poly(aspartic acid) (in English)