Poly copolymers experimental procedure

Three principal types of Suzuki polymerizations for polyfluorenes have been developed for homopolymers and copolymers by Dow, Cambridge Display Technology (CDT), and Covion, which was merged with Merck. Early detailed experimental procedures were reported in the patent literature (Scheme 5.5 and Table 5.2). These and other groups have used these polymerizations for numerous poly fluorene derivatives (Table 5.3). 

Although being qualitatively in agreement with experimental results, disagreements between experiment and theory remain. Besides the composition, /a, and the total degree of polymerization, N, all theoretical works refer to the segmental interaction parameter x This parameter can be estimated from a relationship to the solubility parameters. The ODT as a thermodynamic measure of the incompatibility was used to compare a set of symmetrically composed diblock copolymers from different hydrocarbons, polydimethyl-siloxane and poly(ethylene oxide) (PEO) [33]. While the behaviour of hydrocarbon diblock copolymers was successfully described by a consistent set of solubility parameters, this procedure failed for systems containing PEO. The... 

The samarocene complexes SmMe(C5Me5)2(THF) and Smn(( 5Mc5)212 were employed as initiators for the synthesis of the well-defined block and triblock copolymers poly(trimethylsilyl methacrylate)-fc-PMMA, PTMSMA-fo-PMMA, PMMA-fo-PTMSMA, PTMSMA-fo-P BuA, PMMA-fo-P BuA, and PMMA-fo-P BuA-fo-PMMA [115]. When the procedure started with MMA polymerization, followed by the addition of TMSMA, block copolymers with low polydispersity and stoichiometric molecular weights in very good agreement with the experimental values were obtained. The reverse mode of add-... 

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