Radiation-induced grafting of styrene onto ultra-high molecular weight polyethylene powder and subsequent film fabrication for application as polymer electrolyte membranes: I. Influence of grafting conditions☆

Sherazi, Tauqir A.; Ahmad, Shujaat; Kashmiri, Muhammad Akram; Guiver, Michael D.

doi:10.1016/j.memsci.2008.09.028

Cited by 47 publications

(29 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Styrene-grafted UHMWPE (UHMWPE-g-PS) films used were prepared by the author as described in our previous paper [24]. Chlorosulfonic acid (ClSO 3 H) sulfonating agent and dichloroethane solvent were obtained from Sigma-Aldrich.…”

Section: Methodsmentioning

confidence: 99%

Radiation-grafted membranes based on polyethylene for direct methanol fuel cells

Sherazi

Guiver

Kingston

et al. 2010

Journal of Power Sources

View full text Add to dashboard Cite

Styrene was grafted onto ultrahigh molecular weight polyethylene powder (UHMWPE) by gamma irradiation using a 60 Co source. Compression moulded films of selected pre-irradiated styrene-grafted ultrahigh molecular weight polyethylene (UHMWPE-g-PS) were post-sulfonated to the sulfonic acid derivative (UHMWPE-g-PSSA) for use as proton exchange membranes (PEMs). The sulfonation was confirmed by Xray photoelectron spectroscopy (XPS). The melting and flow properties of UHMWPE and UHMWPE-g-PS are conducive to forming homogeneous pore-free membranes. Both the ion conductivity and methanol permeability coefficient increased with degree of grafting, but the grafted membranes showed comparable or higher ion conductivity and lower methanol permeability than Nafion ® 117 membrane. One UHMWPE-g-PS membrane was fabricated into a membrane-electrode assembly (MEA) and tested as a single cell direct methanol fuel cell (DMFC). Low membrane cost and acceptable fuel cell performance indicate that UHMWPE-g-PSSA membranes could offer an alternative approach to perfluorosulfonic acidtype membranes for DMFC.Crown

show abstract

Section: Methodsmentioning

confidence: 99%

Radiation-grafted membranes based on polyethylene for direct methanol fuel cells

Sherazi

Guiver

Kingston

et al. 2010

Journal of Power Sources

View full text Add to dashboard Cite

show abstract

“…The grafting conditions and grafting reaction kinetics of styrene onto UHMWPE powder and the subsequent film formation process have already been discussed in our previous article [32]. The present work reports on the chlorosulfonic acid post-sulfonation reaction of various films of pre-irradiation styrene-grafted UHMWPE having different levels of grafting.…”

Section: Introductionmentioning

confidence: 82%

“…Styrene was first grafted onto UHMWPE and subsequently hot-pressed into film; the details of the grafting reaction and film formation were described [32]. The polymer sample size was 2 g for each of the grafting reactions.…”

Section: Methodsmentioning

confidence: 99%

“…(1). A detailed study of grafting reaction kinetics and the film formation process was already discussed elsewhere [32]. Ion exchange sites were introduced by post-sulfonation of UHMWPE-g-PS films, where sulfonic acid groups were attached to the aromatic rings of PS graft.…”

Section: Ion Exchange Capacity/degree Of Substitutionmentioning

confidence: 99%

“…This enhances the graft density in the amorphous region of the polymer and subsequently enhances the density of sulfonic acid group substitution following post-sulfonation, which would contribute to the high conductivity of the UHMWPE-g-PSSA membrane. Another possible reason is that entanglement of the grafted and non-grafted portion of the UHMWPE-g-PS membrane may occur during film formation by the compression moulding technique; the detailed procedure is discussed elsewhere [32]. Thus the sulfonated part of the membrane is closely attached with the non-sulfonated portion due to the entanglement caused by the stress applied during film formation.…”

Section: Microstructure Of the Membranesmentioning

confidence: 99%

See 2 more Smart Citations

Radiation-induced grafting of styrene onto ultra-high molecular weight polyethylene powder for polymer electrolyte fuel cell application

Sherazi

Ahmad

Kashmiri

et al. 2009

Journal of Membrane Science

View full text Add to dashboard Cite

Influence of the radiation grafting conditions on the cross‐sectional distribution of poly(vinylbenzyl chloride) grafted polymer onto poly(tetrafluoroethylene‐co‐hexafluoropropylene) films

Geng

Kang

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(vinylbenzyl chloride) (PVBC)-grafted poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) films were prepared as precursors for ion-exchange membranes with a radiation grafting technique. A scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) instrument was used to investigate the effects of the radiation grafting conditions on the distribution profiles of the grafts in the FEP-g-PVBC films because the properties of the ion-exchange membranes were largely affected not only by the degree of grafting (DOG) but also by the distribution of the graft chain. These results indicate that the distribution profile of the grafts largely depended on the grafting parameters, such as the solvent, monomer concentration, film thickness, and irradiation dose.

show abstract

Radiation-induced grafting of styrene onto ultra-high molecular weight polyethylene powder and subsequent film fabrication for application as polymer electrolyte membranes: I. Influence of grafting conditions☆

Cited by 47 publications

References 41 publications

Radiation-grafted membranes based on polyethylene for direct methanol fuel cells

Radiation-grafted membranes based on polyethylene for direct methanol fuel cells

Radiation-induced grafting of styrene onto ultra-high molecular weight polyethylene powder for polymer electrolyte fuel cell application

Influence of the radiation grafting conditions on the cross‐sectional distribution of poly(vinylbenzyl chloride) grafted polymer onto poly(tetrafluoroethylene‐co‐hexafluoropropylene) films

Contact Info

Product

Resources

About