Abstract
Abstract An agro-waste origin cardanol benzoxazine monomer (Ca) has shown potential as a suitable sustainable linker to chemically bind petroleum industry generated waste, elemental sulphur (S) to form random copolymers poly(S-r-Ca). A series of random copolymers with varied weight percent of elemental sulphur (20–95%) were synthesised via bulk polymerisation methodology. The Ca monomer offered several reaction sites to facilitate the formation of sulphur rich copolymers as supported by FT-IR, 1H NMR, Raman spectroscopy, XRD, DSC and TGA studies. The curing temperature of Ca was found to be lowered to reaction temperature i.e. 185 °C from 242 °C using elemental sulphur as co-reactant. Preliminary studies of random poly(S-r-Ca) copolymers with a very high sulphur loadings (>80% w/w) demonstrated inverse vulcanisation and suggest their utility as an efficient substitute to elemental sulphur as a cathode material in Li-S battery.
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