Control of free-radical polymerization of 2,2,2-trifluoroethyl methacrylate (TEMA) by a substituted fluorinated tetraphenylethane-type INITER
摘要:
This paper deals with the free radical polymerization of 2,2.2-trifluoroethyl methacrylate (TEMA) initiated by a substituted fluorinated tetraphenylethane-type INITER.The synthesis of a new fluorinated substituted tetraphenylethane is described. This initiator, prepared from benzophenone: and 3,3,3(trifluoropropyl)chlorodimethylsilane behaves as an INITER when used to polymerize TEMA. In the first period of polymerization. telechelic oligomers are formed. They were isolated from the mixture and their structure was characterized by H-1-NMR spectroscopy, By thermal cleavage at the bonds between the last monomer unit and the end groups from the: initiates, these telechelic oligomers are effective initiators of further free-radical polymerization of ethylenic monomers, yielding block copolymers besides the respective homopolymer. Thus, in a second step, styrene was introduced into poly(TEMA) to produce block copolymers with a macroinitiator efficiency dose to 85%. (C) 2001 Elsevier Science B.V. All rights reserved.
Control of free-radical polymerization of 2,2,2-trifluoroethyl methacrylate (TEMA) by a substituted fluorinated tetraphenylethane-type INITER
作者:J. Roussel、B. Boutevin
DOI:10.1016/s0022-1139(00)00406-1
日期:2001.3
This paper deals with the free radical polymerization of 2,2.2-trifluoroethyl methacrylate (TEMA) initiated by a substituted fluorinated tetraphenylethane-type INITER.The synthesis of a new fluorinated substituted tetraphenylethane is described. This initiator, prepared from benzophenone: and 3,3,3(trifluoropropyl)chlorodimethylsilane behaves as an INITER when used to polymerize TEMA. In the first period of polymerization. telechelic oligomers are formed. They were isolated from the mixture and their structure was characterized by H-1-NMR spectroscopy, By thermal cleavage at the bonds between the last monomer unit and the end groups from the: initiates, these telechelic oligomers are effective initiators of further free-radical polymerization of ethylenic monomers, yielding block copolymers besides the respective homopolymer. Thus, in a second step, styrene was introduced into poly(TEMA) to produce block copolymers with a macroinitiator efficiency dose to 85%. (C) 2001 Elsevier Science B.V. All rights reserved.