PMID- 22953698
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20130318
LR  - 20121024
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 4
IP  - 10
DP  - 2012 Oct 24
TI  - Proton exchange membrane developed from novel blends of polybenzimidazole and 
      poly(vinyl-1,2,4-triazole).
PG  - 5256-65
LID - 10.1021/am301185b [doi]
AB  - In continuation (J. Phys. Chem. B2008, 112, 5305; J. Colloid Interface Sci. 2010, 
      351, 374) of our quest for proton exchange membrane (PEM) developed from 
      polybenzimidazole (PBI) blends, novel polymer blend membranes of PBI and 
      poly(1-vinyl-1,2,4-triazole) (PVT) were prepared using a solution blending 
      method. The aim of the work was to investigate the effect of the blend 
      composition on the properties, e.g., thermo-mechanical stability, swelling, and 
      proton conductivity of the blend membranes. The presence of specific interactions 
      between the two polymers in the blends were observed by studying the samples 
      using varieties of spectroscopic techniques. Blends prepared in all possible 
      compositions were studied using a differential scanning calorimetry (DSC) and 
      exhibited a single T(g) value, which lies between the T(g) value of the neat 
      polymers. The presence of a single composition-dependent T(g) value indicated 
      that the blend is a miscible blend. The N-H...N interactions between the two 
      polymers were found to be the driving force for the miscibility. Thermal 
      stability up to 300  degrees C of the blend membranes, obtained from thermogravimetric 
      analysis, ensured their suitability as PEMs for high-temperature fuel cells. The 
      proton conductivity of the blend membranes have improved significantly, compared 
      to neat PBI, because of the presence of triazole moiety, which acts as a proton 
      facilitator in the conduction process. The blend membranes showed a considerably 
      lower increase in thickness and swelling ratio than that of PBI after doping with 
      phosphoric acid (PA). We found that the porous morphology of the blend membranes 
      caused the loading of a larger amount of PA and, consequently, higher proton 
      conduction with lower activation energy, compared to neat PBI.
FAU - Hazarika, Mousumi
AU  - Hazarika M
AD  - School of Chemistry, University of Hyderabad, Hyderabad, India.
FAU - Jana, Tushar
AU  - Jana T
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20120918
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
EDAT- 2012/09/08 06:00
MHDA- 2012/09/08 06:01
CRDT- 2012/09/08 06:00
PHST- 2012/09/08 06:00 [entrez]
PHST- 2012/09/08 06:00 [pubmed]
PHST- 2012/09/08 06:01 [medline]
AID - 10.1021/am301185b [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2012 Oct 24;4(10):5256-65. doi: 10.1021/am301185b. 
      Epub 2012 Sep 18.