Solid phase thermal polycondensation of aspartic acid in evacuated system results in formation of poly(aspartic acid) at 190-207°C and in poly(succinimide) at 210-230°C. Kinetic parameters of formation of poly(aspartic acid) and poly(succinimide) have been determined. The aspartic acid → poly(aspartic acid) → poly(succinimide) polycondensation is accompanied by partial decarboxylation of the monomeric units.
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