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Grafting vinyl monomers into nylon‐6. II. Graft copolymerization of methyl methacrylate onto nylon‐6 by hexavalent chromium ion
Author(s) -
Nayak Padma L.,
Lenka Subasini,
Mishra Munmaya K.,
Tripathy Atanu K.
Publication year - 1981
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1981.070260729
Subject(s) - grafting , monomer , yield (engineering) , hexavalent chromium , copolymer , methyl methacrylate , polymer chemistry , nuclear chemistry , chromium , chemistry , materials science , polymer , organic chemistry , metallurgy
The feasibility of chromium(VI) to induce graft copolymerization of methyl methacrylate onto nylon‐6 was investigated in the presence of nitrogen. The rate of grafting was determined by varying monomer concentration, chromium(VI) concentration, temperature, acidity of the medium, solvents, inorganic salts, and redox system. The graft yield increases significantly by increasing the monomer concentration. The graft yield increases with increase of [Cr(VI)] up to 0.025 mole/liter. With further increase of [Cr(VI)], the graft yield decreases. The increase of acid concentration up to 0.395 mole/liter results the increase in graft yield. Beyond this concentration the graft yield decreases. The graft yield increases with increase in temperature up to 55°C and thereafter it decreases. The graft yield is medium dependent. The graft yield increases with increasing thiourea concentration upto 0.0025 mole/liter but beyond this concentration, the percentage graft yield decreases. A suitable kinetic scheme has been proposed and the rate equation has been evaluated.