Diethyl ether solutions of the phosphoranimines, Me3SiN=P(OPh)(CH3)(R) {R = n-Bu, n-Hex} and tetrahydrofuran (THF) solutions of the polymers [Et(Ph)P=N](n), [Me(n-Bu)P=N](n), and [Me(n-Hex)P=N](n) were sequentially treated with n-BuLi and appropriate electrophiles to afford new phosphoranimines, Me3SiN=P(OPh)(CH2SiMe3)(R) {R = n-Bu, n-Hex} and Me3SiN=P(OPh)(CH2PPh2)-(n-Bu), and new copolymers, [Et(Ph)P=N](x){[(CH3)(Me3Si)CH](Ph)P=N}(y), [Me(R)P=N](x){[(Me3Si)CH2](R)P=N}(y), and [Me(R)P=N](x){[(eta(5)-C5H5)Fe(eta(5)-C5H4)CH(OH)CH2](R)P=N}(y). The new phosphoranimines were characterized by elemental analysis and H-1, DEPT C-13, and P-31 NMR spectroscopy The new polymers were characterized by elemental analysis, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), H-1 and P-31 NMR spectroscopy, contact angle measurements, and density measurements. The range of substitution of the polymers {i.e., [y/(x + y)] x 100} was 30-70% as determined by elemental analysis. Glass transition temperatures and molecular weights of the derivatives were both higher than the parent polymers. Measurements of Young＇s contact angles (theta(Y)) indicated that the incorporation of Me3Si and ferrocene groups into the polymers increased the hydrophobicity relative to unsubstituted poly(dialkylphosphazenes).