An Investigation of Proton Conductivity of Vinyltriazole-Grafted PVDF Proton Exchange Membranes Prepared via Photoinduced Grafting

Table 2

Doping ratio with TA and 𝑇_𝑔 and maximum proton conductivity values of PVDF based membranes.

Sample name	Doping ratio with TA	𝑇𝑔 (°C)	Max. proton conductivity (Scm^−1)
PVDF	—	−50°C	—
PVTri	—	165°C	1.13 × 10^−7 Scm^−1 at 150°C
PVDF-g-PVTri	—	a	—
PVDF-g-PVTri-(TA)1	1 : 1	a	7 × 10^−4 Scm^−1 at 150°C
PVDF-g-PVTri-(TA)2	1 : 2	a	3 × 10^−3 Scm^−1 at 150°C
PVDF-g-PVTri-(TA)3	1 : 3	a	6 × 10^−3 Scm^−1 at 150°C

a:  𝑇_𝑔 was not observed due to ionic interactions that may result in the restriction of the segmental relaxations.