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The Causes of Anomalous Results in the Measurement of Wool Fibre Swelling
Author(s) -
Asquith R. S.,
Booth A. K.,
Cockett K. R. F.,
Rattee I. D.,
Stevens C. B.
Publication year - 1972
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1972.tb03060.x
Subject(s) - swelling , wool , composite material , penetration (warfare) , materials science , chemistry , mathematics , operations research
The causes of anomalous results obtained in the measurement of the swelling of wool fibres by different methods have been investigated. The British Standard method ( BS 2043) and the fixed‐point method were examined. When urea solutions are used as the swelling media, the results obtained by the two methods differ considerably. The short lengths of fibre used in the BS 2043 method are well within the fibre dimensions for swelling to occur by end penetration and hence give results that can be misleading when related to the swelling of undamaged fibres during processing. When the swelling agent itself can penetrate the fibre wall, either method will give reliable results. When, however, the agent can show colligative osmotic properties typical of many non‐volatile salts, discrepancies may arise between the two methods.