TY - JOUR

T1 - Hydrodynamic and conformational properties of silicon-substituted addition-type polynorbornene macromolecules

AU - Yevlampieva, N. P.

AU - Zaitseva, I. I.

AU - Gringolts, M. L.

AU - Khlyabich, P. P.

AU - Rogan, Yu V.

AU - Ryumtsev, E. I.

PY - 2008/10/1

Y1 - 2008/10/1

N2 - Seven polynorbornene samples containing trimethylsilyl side groups that were prepared by the addition polymerization of 5-trimethylsilyl-2-norbornene in the presence of catalytic systems (π-C5H9NiCl) 2-methylaluminoxane and nickel naphthenate-methylaluminoxane have been studied by translational isothermal diffusion and viscometry. The molecular masses of the polymer samples are measured. Kuhn-Mark-Houwink equations for diffusion coefficient D and intrinsic viscosity [η] are determined in toluene at 25°C: D = 6.94 × 10-4 M-0.61 and [η] = 1.53 × 10-3 M0.82. The equilibrium rigidity of polymers chains is estimated as A = 47 ± 9 Å. The conformational features of the silicon-containing polynorbornene are analyzed by the PM3 quantumchemical semiempirical method on the basis of simulation of its decamer chain fragments. In terms of microstructure and equilibrium rigidity, the above-described addition poly(trimethylsilylnorbornene) is close to poly(trimethylsilylpropyne) synthesized using niobium pentachloride as a catalyst. This finding explains similar membrane gas-separation properties of these polymers.

AB - Seven polynorbornene samples containing trimethylsilyl side groups that were prepared by the addition polymerization of 5-trimethylsilyl-2-norbornene in the presence of catalytic systems (π-C5H9NiCl) 2-methylaluminoxane and nickel naphthenate-methylaluminoxane have been studied by translational isothermal diffusion and viscometry. The molecular masses of the polymer samples are measured. Kuhn-Mark-Houwink equations for diffusion coefficient D and intrinsic viscosity [η] are determined in toluene at 25°C: D = 6.94 × 10-4 M-0.61 and [η] = 1.53 × 10-3 M0.82. The equilibrium rigidity of polymers chains is estimated as A = 47 ± 9 Å. The conformational features of the silicon-containing polynorbornene are analyzed by the PM3 quantumchemical semiempirical method on the basis of simulation of its decamer chain fragments. In terms of microstructure and equilibrium rigidity, the above-described addition poly(trimethylsilylnorbornene) is close to poly(trimethylsilylpropyne) synthesized using niobium pentachloride as a catalyst. This finding explains similar membrane gas-separation properties of these polymers.

UR - http://www.scopus.com/inward/record.url?scp=54249133074&partnerID=8YFLogxK

U2 - 10.1134/S0965545X0810009X

DO - 10.1134/S0965545X0810009X

M3 - Article

AN - SCOPUS:54249133074

VL - 50

SP - 1082

EP - 1089

JO - Polymer Science - Series A

JF - Polymer Science - Series A

SN - 0965-545X

IS - 10

ER -