Abstract
Six polypyrimidines were prepared from p-Xylylpyrimidine(l) with p-phenylenediamine (P1, PDA), benzdinene (P2, BD), diaminodiphenylether (P3, DPE), diaminodiphenylmethane (P4, DPM), diaminodiphenylsulfone (P5, DPS) and hexamethylenediamine (P6, HDA). These polymers prepared by polycondensation of carbonyl group and amino group have pyrimidine rings and azomethine in the main chain.
The relationship between chemical structure of polypyrimidines and dark- and light-decay characteristics of surface charge was discussed.
The dark- and light-decay of the surface charge by the negative corona discharge for polypyrimidines were observed. The decaying rates of the sureface potential were found to be in the following order; DPM > PDA > HDA > BD > DPE > DPS for dark decay, DPS > DPE > BD for light decay. The ratio of light decaying constant was found to be greater in the following order; DPS > DPE > BD.
