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Radiation‐Induced graft copolymerization of methacrylic acid onto polypropylene fibers. V. Mechanical properties
Author(s) -
Mukherjee A. K.,
Gupta B. D.
Publication year - 1985
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.1985.070300818
Subject(s) - methacrylic acid , polypropylene , copolymer , materials science , grafting , fiber , polymer chemistry , tenacity (mineralogy) , composite material , modulus , elongation , polymer , polymer science , ultimate tensile strength
Mechanical properties of polypropylene‐ g ‐poly(methacrylic acid) fibers, prepared by graft copolymerization of methacrylic acid onto polypropylene fiber using simultaneous gamma ray irradiation technique, were evaluated. In general, an improvement in the mechanical behavior of the polypropylene fiber by grafting was observed. Denier and initial modulus of the fiber showed a linear increase with the percent graft, and elongation showed an opposite trend. The results have been explained in terms of reinforcing effect of poly(methacrylic acid) grafts and reduction in the segmental mobility of the polymeric chains. Tenacity also increases up to certain graft level, beyond which a sharp decrease occurs, probably due to the influence on the compactness of the macromolecular chains with the further grafting.