Solution characterization of the novel organometallic polymer poly(ferrocenyldimethylsilane)

Citation
Ja. Massey et al., Solution characterization of the novel organometallic polymer poly(ferrocenyldimethylsilane), J POL SC PP, 38(23), 2000, pp. 3032-3041
Citations number
18
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
ISSN journal
08876266 → ACNP
Volume
38
Issue
23
Year of publication
2000
Pages
3032 - 3041
Database
ISI
SICI code
0887-6266(200012)38:23<3032:SCOTNO>2.0.ZU;2-9
Abstract
A series of four well-defined poly(ferrocenyldimethylsilane) (PFS) samples spanning a molecular weight range of approximately 10,000-100,000 g mol(-1) was synthesized by the living anionic polymerization of dimethyl[1]silafer rocenophane initiated with n-BuLi. The polymers possessed narrow polydisper sities and were used to characterize the solution behavior of PFS in tetrah ydrofuran (THF). The weight-average molecular weights (M-w) of the polymers were determined by low-angle laser light scattering (LALLS), conventional gel permeation chromatography (GPC), and GPC equipped with a triple detecto r (refractive index, light scattering, and viscosity). The molecular weight calculated by conventional GPC, with polystyrene standards, underestimated the true value in comparison with LALLS and GPC with the triple detection system. The Mark-Houwink parameter a for PFS in THF was 0.62 (k - 2.5 x 10( -4)), which is indicative of fairly marginal polymer-solvent interactions. The scaling exponent between the radius of gyration and M-w was 0.54, also consistent with marginal polymer-solvent interactions for PFS in THF. (C) 2 000 John Wiley & Sons, Inc.