SEARCH Articles Figures Tables Dimethyl-p-phenylene diamine Dimethylbutyl-N-phenyl-p-phenylene Diamine (6PPD) Diphenyl-p-phenylene diamine N-Di-6efa-naphthyl-p-phenylene Diamine (DNPD) N-Diphenyl-p-phenylene Diamine (DPPD) P-phenylene Phenylene diamine