In our previous report

it was discovered that the polycondensation reaction of 9-amino-pelargonic acid followed second order kinetics from the beginning up to an extent of reaction

p

about 99%

after that

the system became very viscous

the reaction changes rapidly to a third order kinetics In this paper

we wish to report that

this change of the reaction order from second to third occured also in the polycondensation of 6-amino-caproic acid and 11-amino-undecanoic acid. The transition regions lie again at p about 99%.From these results

it may conclude that this is a general rule in the polyamidation of the w-amino-acid (monomers of the AB type)

and the contradictory results appeared in literature in this fi-eld may be settled by our experiment.