<span style="font-size: 20.5pt;mso-bidi-font-size:14.5pt;font-family:"Times New Roman","serif"">Modification of natural polymers: Part IV—Graft copolymerization of methyl acrylate onto <i>Cannabis indica </i>fibre initiated by ceric ammonium nitrate </span>

Abstract

<i><span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">Cannabis indica </span></i><span style="font-size:14.5pt;mso-bidi-font-size:8.5pt; font-family:" times="" new="" roman","serif""="">fibre has been graft copolymerized with methyl acrylate using ceric ammonium nitrate as initiator. The effect of monomer, initiator and HNO₃ concentrations, amount of water, reaction temperature and reaction time on per

<span style="font-size: 14.5pt;mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">cent grafting has been studied. The swelling behaviour in DMF, <i style="mso-bidi-font-style: normal">n</i>-butanol and water follows the pattern DMF <span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family:" arial","sans-serif""="">> <span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">H_{<span style="font-size:12.0pt;mso-bidi-font-size:6.0pt;font-family:" times="" new="" roman","serif""="">2</span>}<span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family:" arial","sans-serif""="">O> <i><span style="font-size:13.5pt;mso-bidi-font-size:7.5pt;font-family: " arial","sans-serif""="">n-</span></i><span style="font-size:14.5pt;mso-bidi-font-size: 8.5pt;font-family:" times="" new="" roman","serif""="">butanol for the grafted fibres and H_{<span style="font-size:12.0pt;mso-bidi-font-size:6.0pt;font-family: " times="" new="" roman","serif""="">2</span>}<span style="font-size:14.5pt; mso-bidi-font-size:8.5pt;font-family:" arial","sans-serif""="">O> <span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">DMF <span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family:" arial","sans-serif""="">> <i style="mso-bidi-font-style:normal"><span style="font-size:14.5pt; mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">n</span></i><span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">-butanol for the ungrafted fibre. Both the ungrafted and grafted fibres degrade thermally in multiple and single stage respectively. Grafting has not been found to improve the thermal stability of the fibre. A plausible explanation to account for the trends in results has been provided.

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