In recent years,the demand for piping materials in developing countries such as South Asia and the Middle East is increasinged.Most of the piping materials are derived from the polyvinyl chloride(PVC)and chlorinated polyvinyl chloride(CPVC)due to their excellent high heat resistance and relatively low cost.An increase of such halogenated plastic derived wastes is issuing environmental problems.Incineration of PVC and CPVC emits many harmful chlorinated dioxins gases like polychlorinated dibenzodioxins.One of the effective utilization methods of the CPVC wastes is their usage-usage as a raw material to prepare useful materials,such as CPVC-derived carbon nanofibers.It has been reported that 100-300 nm sized CPVC nanofibers can be obtained using the electrospinning technique.However,the obtained electro-spun CPVC nanofiber was totally melted down during the carbonization.Yao et al.succeed to produce the CPVC-derived carbon nanofiber by electrospinning using Fe3O4 as a catalyst to maintain the nanofiber structure [1].In this study,as an alternative method to overcome the melting problem of CPVC nanofiber during the carbonization,isotropic pitch(IP)of softening point at c.a.260-°C was blended with CPVC.It expected that IP could maintain the nanofiber structure during the carbonization process and CPVC would give the-an effect of halogenation-dehalogenation to polymerize the pitch and CPVC with high aromaticity and molecular weight.In addition,released chlorine from CPVC during the carbonization may generate narrow micropores even without the activation step.Therefore,it is expected that CPVC/IP-derived carbon nanofiber can be utilized in many application fields as adsorbents.
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