SEARCH Articles Figures Tables Alkyl-aryl PPDs BPADA-PPD polyetherimide Evaluation of PPDs Evaluation of a PPD Formulas for Hamiltonian and Overlap Matrix Elements in the PPD Algorithm PPD index PPDS (Physical Property Data PPDS package Paired-Permanent Determinant (PPD) Function Phosphonopyruvate decarboxylase (PPD Poly(o-Phenylenediamine) (PPD)