Author： Muthu Lakshmi R. Choudhary V. Varma I.
Publisher： Springer Publishing Company
ISSN： 0022-2461
Source： Journal of Materials Science, Vol.40, Iss.3, 2005-02, pp. : 629-636
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The sulphonation of commercially available PEEK in powder form (Gatone™, Gharda Chemicals Limited, India) was carried out using conc. H2SO4 under different reaction conditions. The duration of reaction was varied from 3–5 h, polymer concentration 4–10% (w/v) and temperature 35–50∘C. Structural characterisation of sulphonated polymers was done by elemental analysis, FT-IR and 1H-NMR spectroscopy. The degree of sulphonation as calculated from 1H-NMR and elemental analysis (S-content) was found to be in the range of ∼ 50–80%. Multistep mass loss was observed in thermogravimetric traces (recorded in N2 atmosphere). The first step (50–225 ± 25∘C) was due to loss of moisture (1–10%) and second step (250–425 ± 25∘C) has been attributed to volatilization of SO3 from the sulphonic group. The backbone degradation takes place above 450∘C. The mechanical properties and proton conductivities of various sulphonated samples was also evaluated.
Related content
Tribological studies of poly(ether ether ketone) blends
By Stuart B.H.
Tribology International, Vol. 31, Iss. 11, 1998-11 ,pp. :
Access to resources
Recommend
By Francis Bejoy Lakshmana Rao V. Jose Seno Catherine Bina Ramaswamy R. Jose Jesmy Thomas Sabu
Journal of Materials Science, Vol. 41, Iss. 17, 2006-09 ,pp. :