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Steam and heat setting of nylon 6 fiber. VI. Water adsorption on nylon 6 fiber
Author(s) -
Koshimo A.,
Tagawa T.
Publication year - 1965
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.1965.070090107
Subject(s) - amorphous solid , fiber , adsorption , intermolecular force , materials science , nylon 6 , composite material , volume fraction , polymer , molecule , polymer chemistry , crystallography , chemistry , organic chemistry
Water adsorption of nylon 6 fibers subjected to various heat‐setting treatments was measured over the range of 0–80% R.H. with a quartz balance, and the water adsorbed on the first layer ( v m ) was calculated. The value of v m was largest for unset fiber, intermediate for steam‐set fiber, and the smallest for dry‐heat‐set fiber. The inner surface areas in nylon calculated from v m are 4–5 × 10 5 cm. 2 /g. The value obtained by dividing v m by the amorphous fraction (1 − α) of heat‐set fibers appears to be related to the number of intermolecular bonds per unit volume of the amorphous region. The smaller values of v m thus obtained for the dry‐heat‐set fibers indicate that polymer molecules in the amorphous region form many intermolecular bonds and are more closely packed than those in the unset and steam‐set fibers.