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Surface modification of coir fibers I: studies on graft copolymerization of methyl methacrylate on to chemically modified coir fibers
Author(s) -
Rout Jogeswari,
Misra Manjusri,
Mohanty Amar K.
Publication year - 1999
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199906)10:6<336::aid-pat884>3.0.co;2-o
Subject(s) - coir , materials science , ultimate tensile strength , grafting , copolymer , fiber , composite material , fourier transform infrared spectroscopy , methyl methacrylate , yield (engineering) , chemical engineering , polymer chemistry , polymer , engineering
Graft copolymerization of methyl methacrylate (MMA) onto chemically modified coir fiber was studied using a CuSO 4 –KIO 4 combination as initiator in an aqueous medium in the temperature range of 50–70 °C. Concentrations or [IO 4 −] = 0.005 mol/l and [Cu2+] = 0.002 mol/l produce optimum grafting. The effects of time, temperature, amount of coir fiber, some inorganic salts and organic solvents on graft yield have also been investigated. On the basis of experimental findings, a reaction mechanism has been proposed. Evidence of grafting was studied from fourier transform infrared spectroscopy and scanning electron microscopy of chemically modified coir and MMA‐grafted coir. Tensile properties such as maximum stress at break, extension at break and Young's modulus of untreated, defatted, chemically treated and grafted coir fibers were evaluated and compared. Grafted coir fiber showed an increase in tensile properties such as maximum stress at break, extension at break and Young's modulus. Copyright © 1999 John Wiley & Sons, Ltd.