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An extreme dependence of the softening temperature of polycomplexes of p-phenylenediamine and low-molecular-weight polycondensation products of boric acid on the ratio thereof is revealed. The stoichiometric ratio of the BA/p-PDA complex is 75/25 wt %, which corresponds to a molar ratio of BA trimer/p-PDA = 1: 1. At a higher content of the amine, the softening temperature of the polycomplex decreases...
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