抄録
Piperazine polyamide homologs were prepared by melt polycondensation of piperazine or 2-methyl piperazine or 2, 5-dimethyl piperazine with adipic acid or suberic acid or sebacic acid.
The melting points of the polymers decreases, whereas, the glass transition points increases by methylsubstitution of piperazine ring. The densities of the polymers decreases and the moisture regains increase by methyl-substitution of piperazine ring. Methyl-substituted piperazine polyamides have relatively high moisture regain, which probably is due to the higher electro-negativity of carbonyl group and the loose packing of polymer chain.
