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Influence of molecular weight on the resistance of polylactide fibers by radiation sterilization
Author(s) -
Horáček I.,
Kudláček L.
Publication year - 1993
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.1993.070500101
Subject(s) - ultimate tensile strength , elongation , irradiation , sterilization (economics) , materials science , degradation (telecommunications) , spinning , composite material , radiation dose , radiation , polymer chemistry , nuclear medicine , monetary economics , economics , foreign exchange market , foreign exchange , quantum mechanics , medicine , telecommunications , physics , computer science , nuclear physics
The mechanical properties and in vitro degradability of poly(L‐lactide) fibers with different average molecular weights, prepared by a dry spinning–hot drawing process from CHCI 3 solutions, were studied in relation to the γ‐irradiation dose. In the range of molecular weight of 1.6−3.6 × 10 5 , no differences were found in the relative decrease of tensile strength after irradiation of 25 kGy. Changes of the elongation at break are discussed in terms of a network solution theory. In vitro degradation of the fibers is also discussed in network solution theory terms. Regardless of the courses of degradation curves, it may be stated that all prepared fibers could be sterilized by γ‐rays and the rate of degradation was not affected by the irradiation dose. © 1993 John Wiley & Sons, Inc.