Structure of the endgroups of polyvinylidene fluoride synthesized in the presence of β-hydroxyethyl-tert-butyl peroxide

Synergistic effect on crystalline structure of polyvinylidene fluoride nanocomposites with multiwalled carbon nanotube loading by a twin screw extruder

“…Data from the literature supports the idea that the double melting peaks observed in the DSC experiment on PVDF are due to a peculiar polymorphic structure of this polymer. 24,25 In particular, some literature depicted that the low temperature melting peak was due to the formation of a-form crystalline structure while the high temperature peak is due to the b-form. The bphase crystal with all-trans conformation gives higher endotherm than the a-phase crystal with trans-gauche-trans-gauche (TGTG) conformation.…”

The structure and properties of block poly(vinylidene fluoride) and systems based on it

“…When PPS was used, the number of volatile substances in the latter proved to be higher by an order of magnitude, 58 which was manifested by a reduced thermal stability of the polymer. S9 The results obtained by analytical methods, including isotope analysis, 61 showed that CH3 end groups predominate in polymerisation with participation of HETBP, whereas in polymerisation involving PPS there is a possibility of the formation of hydroxy-groups at the ends. In the version involving the addition of ~CH2-CF2-OH groups, the latter prove to be unstable and there is a possibility of dehydrofluorination reactions with elimination of HF in accordance with the mechanism ~CF 2 -OH-»HF + ~CF = O.…”