CHEN Ye, YANG De-cai. EFFECT OF TACTICITY OF PMMA ON β PHASE FORMATION OF PVF2 DURING QUENCHING PROCESS[J]. Acta Polymerica Sinica, 1992,(3):354-357.DOI:
Fourier transform infrared spectroscopy (FTIR) has been used to study the effect of tacticity of PMMA on β-phase formation of poly (vinylidene fluoride) (PVF2) during quenching process. For pure PVF2
quenching at lower temperature results in formation of β-phase crystallites. The critical quenching temperature for 3-phase formation is about 30℃. Adding a given amount of PMMA (30%)
especially syndiotactic PMMA (s-PMMA)
into PVF2 results in increase of the critical quenching temperature upto 70℃. This is due to the interac-tion of hydrogen bonding between the molecules of PVF2 and PMMA
which stablizes the TTT conformation of PVF2 and forms the nuchleation sites of the β-phase at higher temperature.