ZHOU Ren-mo, WU Wen-chao, LU Mei-li, ZU Zhen-hao. THE REACTIVITY OF THE SEQUENCE RADICAL IN THE COPOLYMERIZATION OF VINYLLDENEFLURIDE (VDF) AND TETRAFLUOROETHYLENE (TFE)[J]. Acta Polymerica Sinica, 1987,(1):56-62.
ZHOU Ren-mo, WU Wen-chao, LU Mei-li, ZU Zhen-hao. THE REACTIVITY OF THE SEQUENCE RADICAL IN THE COPOLYMERIZATION OF VINYLLDENEFLURIDE (VDF) AND TETRAFLUOROETHYLENE (TFE)[J]. Acta Polymerica Sinica, 1987,(1):56-62.DOI:
A series of VDF-TFE copolymers of different composition were studied by 56.4 MHz and 188.2 MHz high resolution 19F-NMR spectrometer. These results indicated that the chemical shifts of central -CF2- group are not only affected by the first and the second neighboring groups
but also by the third neighboring group. VDF and TFE seemed to copolymerize in a random way. The growing polymer chain radical -CF2. or-CH2 . is strongly favored over the CH2 end of CH2 = CF2
and the growth of the chain radical-CH2. trended towards CF2=CF2 in the copolymerization of VDF and TFE.