TY - JOUR
T1 - Polyvinylidene fluoride/poly(ethylene terephthalate) conductive composites for proton exchange membrane fuel cell bipolar plates
T2 - Crystallization, structure, and through-plane electrical resistivity
AU - Song, Jianbin
AU - Mighri, Frej
AU - Ajji, Abdellah
AU - Lu, Chunhua
PY - 2012/12
Y1 - 2012/12
N2 - Polyvinylidene fluoride/poly(ethylene terephthalate) (PVDF/PET)-based composites for proton exchange membrane fuel cell bipolar plates (BPs) were prepared at different crystallization temperatures and characterized by X-ray diffraction, differential scanning calorimetry, and resistivity setup. Composite conductivity was made possible by using a mixture of carbon black (CB) and graphite (GR). To improve composite processability, its viscosity was reduced by adding a small amount of cyclic butylene terephthalate (c-BT) oligomer and thermoplastic polyolefin elastomer. In the PVDF/PET-based composite, it was found that PVDF phase could crystallize easily but PET crystallization was difficult. Because of the CB/GR additives, the formed crystals in PVDF/PET phases had a poor perfection degree and showed a lower melting temperature when compared with pure PVDF and PET. It was observed that PET nucleation was accelerated but not that of PVDF. According to through-plane resistivity results, composite crystallization temperature range was divided into two parts (below/above 170°C), in which a different variation behavior of through-plane resistivity was observed. It has been proved that the resistivity was mainly governed by the network of CB/GR developed inside the PET phase, and decreasing the crystallinity of PET led to a decrease of through-plane resistivity, which is desirable for BPs. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers
AB - Polyvinylidene fluoride/poly(ethylene terephthalate) (PVDF/PET)-based composites for proton exchange membrane fuel cell bipolar plates (BPs) were prepared at different crystallization temperatures and characterized by X-ray diffraction, differential scanning calorimetry, and resistivity setup. Composite conductivity was made possible by using a mixture of carbon black (CB) and graphite (GR). To improve composite processability, its viscosity was reduced by adding a small amount of cyclic butylene terephthalate (c-BT) oligomer and thermoplastic polyolefin elastomer. In the PVDF/PET-based composite, it was found that PVDF phase could crystallize easily but PET crystallization was difficult. Because of the CB/GR additives, the formed crystals in PVDF/PET phases had a poor perfection degree and showed a lower melting temperature when compared with pure PVDF and PET. It was observed that PET nucleation was accelerated but not that of PVDF. According to through-plane resistivity results, composite crystallization temperature range was divided into two parts (below/above 170°C), in which a different variation behavior of through-plane resistivity was observed. It has been proved that the resistivity was mainly governed by the network of CB/GR developed inside the PET phase, and decreasing the crystallinity of PET led to a decrease of through-plane resistivity, which is desirable for BPs. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers
UR - http://www.scopus.com/inward/record.url?scp=84869506534&partnerID=8YFLogxK
U2 - 10.1002/pen.23216
DO - 10.1002/pen.23216
M3 - 文章
AN - SCOPUS:84869506534
SN - 0032-3888
VL - 52
SP - 2552
EP - 2558
JO - Polymer Engineering and Science
JF - Polymer Engineering and Science
IS - 12
ER -