Synthesis and investigation of phosphazene polymers containing silicon

Beloglazova, T.N.; Kireyev, V.V.; Kolesnikov, H.S.; Raigorodskii, I. M.

doi:10.1016/0032-3950(71)90374-1

Cited by 4 publications

(2 citation statements)

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“…The uses of such polymers in membranes and in hydrophobic surfaces are subjects of additional interest. Several research groups have explored the possibility that hybrid systems of this type may be accessible. − However, until recently, relatively few successful macromolecular syntheses have been described. − …”

Section: Introductionmentioning

confidence: 99%

“…Several research groups have explored the possibility that hybrid systems of this type may be accessible. [6][7][8][9][10][11][12][13][14][15] However, until recently, relatively few successful macromolecular syntheses have been described. [16][17][18][19][20][21][22][23][24] An approach being followed in our program is to link organosilicon side groups to a high polymeric phosphazene chain.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Aminoorganosiloxane-Bearing Polyphosphazenes: New Properties by the Elimination of Hydrogen Bonding

1996

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The synthesis of new hybrid polyphosphazene−siloxane polymers is described. These polymers contain a polyphosphazene backbone and [(N-methylamino)propyl]siloxane side groups, −N(Me)(CH2)3SiMe2OSiMe3 or −N(Me)(CH2)3SiMe2OSiMe2OSiMe3, in ratios of 1:1 and 1:3 with trifluoroethoxy, 2-(2-methoxyethoxy)ethoxy, or p-methylphenoxy cosubstituents. The synthetic method utilized allows the polymer properties to be tuned by variations in the cosubstituent ratios. The polymers were characterized by 31P, 13C, and 1H NMR, differential scanning calorimetry (DSC), gel permeation chromatography (GPC), and elemental analysis. The percent loading of siloxane-containing side groups and the nature of the cosubstituents were correlated to the glass transition temperatures. The glass transition temperatures ranged from −83 to −22 °C. The longer, trisiloxane-containing units generated lower glass transition temperatures than did the analogous polymers with disiloxane-containing side groups. Several polymers were further characterized by dynamic mechanical analysis (DMA). In addition to glass transition temperatures, other transitions attributed to the siloxane side groups were detected at approximately −124 °C.

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