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Hybrid fluorinated silicones, 2 . Synthesis and thermal properties of homopolymers and copolymers
Author(s) -
Boutevin Bernard,
Caporiccio Gerardo,
GuidaPietrasanta Francine,
Ratsimihety Amédée
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19980101)199:1<61::aid-macp61>3.0.co;2-i
Subject(s) - silanol , copolymer , thermal stability , polymer chemistry , chlorosilane , materials science , polymer , condensation , condensation polymer , fluorocarbon , chemical engineering , chemistry , organic chemistry , composite material , catalysis , silicon , physics , engineering , metallurgy , thermodynamics
The syntheses of various random and alternating copolymers of a fluorosiloxane and a hybrid fluorocarbon‐fluorosiloxane are described, and their thermal properties are compared. The parent hybrid homopolymer and the random copolymers were prepared by silanol‐chlorosilane condensation, while the alternating copolymers were prepared by silanol/ N ‐bis(acetamidosilane) condensation. The polymers were analysed by 1 H, 19 F and 29 Si NMR spectroscopies and SEC chromatography. The influence of the backbone architecture on their thermal properties was evaluated by DSC and TGA: the copolymers (random or alternating) showed little variation among themselves but slightly better thermal characteristics at low temperature ( T g lowered by about 10 to 15°C) than the parent hybrid homopolymer, whereas the parent homopolymer exhibited higher (≈15°C) stability at high temperature.