Diethyl ether solutions of the phosphoranimines,
Me3SiNP(OPh)(CH3)(R)
{R = n-Bu,
n-Hex} and tetrahydrofuran (THF) solutions of the polymers
[Et(Ph)PN]
n
,
[Me(n-Bu)PN]
n
, and
[Me(n-Hex)PN]
n
were sequentially
treated with n-BuLi and appropriate electrophiles to afford
new
phosphoranimines,
Me3SiNP(OPh)(CH2SiMe3)(R)
{R = n-Bu, n-Hex} and
Me3SiNP(OPh)(CH2PPh2)(n-Bu), and new copolymers,
[Et(Ph)PN]
x
{[(CH3)(Me3Si)CH](Ph)PN}
y
,
[Me(R)PN]
x
{[(Me3Si)CH2](R)PN}
y
, and
[Me(R)PN]
x
{[(η5−C5H5)Fe(η5−C5H4)CH(OH)CH2](R)PN}
y
.
The new phosphoranimines
were characterized by elemental analysis and 1H, DEPT
13C, and 31P NMR spectroscopy. The new
polymers
were characterized by elemental analysis, gel permeation chromatography
(GPC), differential scanning
calorimetry (DSC), 1H and 31P NMR spectroscopy,
contact angle measurements, and density measurements. The range of substitution of the polymers {i.e.,
[y/(x + y)] × 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 (θY) indicated that the
incorporation of Me3Si and ferrocene groups into the
polymers increased the hydrophobicity relative to
unsubstituted poly(dialkylphosphazenes).
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