S. Borkar, K. Jankova, H. Siesler
Jan 3, 2004
Citations
1
Influential Citations
96
Citations
Quality indicators
Journal
Macromolecules
Abstract
2,3,5,6-Tetrafluoro-4-(2,2,3,3,3-pentafluoropropoxy)styrene (TF(F5)S) and 2,3,5,6-tetrafluoro-4-(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctaoxy)styrene (TF(F15)S) are prepared by nucleophilic substitution of 2,3,4,5,6-pentafluorostyrene. The neat monomers are subjected to atom transfer radical polymerization (ATRP) at 110 °C to high conversions in relatively short times, 10−120 min; TF(F5)S is additionally polymerized at 70 and 90 °C. Block copolymers with styrene are prepared by the macroinitiator approach. All polymers, in the number-average molecular weight range from 6000 to 35 000, have polydispersity indexes between 1.08 and 1.37. The homopolymers show glass transitions from 16 to 62 °C depending on molecular weight, whereas the block copolymers exhibit phase separation mirrored in two Tgs, which could be observed when the smallest block constitutes more than 10 mol %. The fluorinated side chains of P(TF(F5)S) and P(TF(F15)S) enrich the surface of thin films, which results in an advancing wate...