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Irradiation of poly(vinyl alcohol) fibers in the presence of chloroform and carbon tetrachloride
Author(s) -
Varma I. K.,
Sharma Kamlesh K.,
Varma D. S.
Publication year - 1977
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.1977.070211107
Subject(s) - chloroform , vinyl alcohol , irradiation , carbon tetrachloride , thermogravimetric analysis , ultimate tensile strength , materials science , radiolysis , viscosity , polymer chemistry , polymer , chemistry , nuclear chemistry , composite material , organic chemistry , aqueous solution , physics , nuclear physics
Radiolysis of poly(vinyl alcohol) fibers (PVA) in the presence of chloroform and carbon tetrachloride was investigated. Decrease in intrinsic viscosity was observed at lower dosages (up to 2.3 megarads); and above this, an increase was noted. The blank samples irradiated under similar conditions showed a continuous decrease in intrinsic viscosity. A discoloration in the samples irradiated in the presence of CCl 4 and CHCl 3 was also observed. It is attributed to double bond formation in the backbone. A marginal decrease in the tensile strength of the irradiated fibers was observed. However, the surface characteristics of the fibers did not change on irradiation. The thermogravimetric analysis revealed a better heat resistance in irradiated fibers.