13C NMR Characterization of Polymers from 2,2,2-Trifluoroethyl Methacrylate

Abstract

ABSTRACT:In an attempt to develop structural characterisation of polymers from fluorinated acrylic derivatives, a detailed 13 C NMR analysis of free radical and anionic poly(2,2,2-trifluoroethyl methacrylate) (poly(TFEM)) was performed as compared to relevant literature studies concerning the corresponding methyl methacrylate (MMA) polymers. On the other side, the moderately syndiotactic microstructure of the poly(TFEM) samples fits very well with that of corresponding poly(MMA) samples and can be interpreted on the basis of the same statistical distribution of triads. Thus it appears that the presence of the -CHr--CF 3 group does not affect in a determining way the stereochemistry of the polymerization. According to this final statement, anionic initiators give prevailingly isotactic poly(TFEM) as detected by 13 C NMR.

Synthesis and reactivity of a fluorinated N-alkylmaleimide towards free-radical grafting and polymerization reactions

“…The anionic polymerization of type a FA can be performed, as expected, with similar results as of their unfluorinated analogs; appropriate selection of the reaction conditions can lead to polymers with different tacticity [6].…”

Radical copolymerization of 2,2,2-trifluoroethyl methacrylate with cyano compounds for dielectric materials: Synthesis and characterization

“…The assignments were deduced from the comparison with those of the homopolymers of cyano monomers [36,37] and homopolymer and copolymers of MATRIF [22,24]. The spectra showed the chemical shifts of different protons in the copolymers.…”

“…Hence, MVCN monomer exhibits repulsive effects [9] when adding MATRIF comonomer and contains high proportions of MATRIF monomer because MVCN does not homopolymerize giving trimer only. The various resonances in 13 C NMR spectra of copolymers of MATRIF were assigned by comparing them with the spectra of the homopolymers [24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Table 3 summarizes the 13 C NMR chemical shifts of these copolymers and Fig.…”

“…Several fluoroalkylacrylate and methacrylate polymers were developed and their physical properties studied [23][24][25][26][27][28][29][30][31]. Dielectric relaxation studies were achieved on a series of poly(fluoroalkylmethacrylate)s. The a above T g and g relaxations below T g were observed and assigned to reorientation of segments and local molecular motion of fluoroalkyl side groups [32].…”

Effects of chemical variations on the mesophase behavior of new fluorinated poly(vinylcyclopropane)s

“…The incorporation of fluorine in a polymer causes the polymer to have a low surface energy [10,11] potentially leading to low wettability, low friction coefficient and low adhesion [12][13][14][15][16]. Commercially available fluorinated ester side chain acrylic and methacrylic polymers are typical low surface energy coating materials [17].…”