Premium
Preparation of antimicrobial sutures by preirradiation grafting of acrylonitrile onto polypropylene monofilament. II. Mechanical, physical, and thermal characteristics
Author(s) -
Jain Rachna,
Gupta Bhuvanesh,
Anjum Nishat,
Revagade Nilesh,
Singh Harpal
Publication year - 2004
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.20543
Subject(s) - crystallinity , materials science , polypropylene , scanning electron microscope , grafting , differential scanning calorimetry , fourier transform infrared spectroscopy , crystallization , polymer chemistry , composite material , acrylonitrile , chemical engineering , polymer , copolymer , physics , engineering , thermodynamics
Polypropylene‐ g ‐polyacrylonitrile sutures were prepared by graft polymerization of acrylonitrile onto polypropylene monofilament by preirradiation method. Sutures with various graft levels were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Density, Birefriengence, X‐ray Diffraction, Scanning Electron Microscopy (SEM), and Differential Scanning Calorimetry (DSC). Mechanical properties of the unmodified and grafted sutures were also evaluated. The physical characteristics of sutures were markedly affected by the graft levels. Density of the polypropylene sutures increased with an increased in the degree of grafting. The heat of fusion and heat of crystallization decreased with the increase in the degree of grafting. X‐ray diffraction also revealed decrease in crystallinity with the increase in the graft levels. Tenacity of the monofilament improved, whereas the elongation at break decreased in grafted samples. Scanning electron microscopy showed significant variation in surface morphology in the grafted samples. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1224–1229, 2004