Abstract
The standard tests for relaxation shrinkage and hygral expansion of wool fabric take no account of pH. It is shown in this work that the pH of the solution in which wool fabric is relaxed as part of the procedure for measuring dimensional properties has a significant influence on the results. At around pH 4.8, which is close to the isoelectric point of wool, the hygral expansion reaches its greatest value and drops at both lower and higher pHs. A similar relationship between pH and extensibility of wool fabric was observed. Values of relaxation shrinkage were found to be dependant on pH. The reasons for the pH dependence of dimensional properties are discussed and these include changes in wool fiber swelling, yam crimp and polymer relaxation phenomena with changes in pH.
| Original language | English |
|---|---|
| Pages (from-to) | 230-233 |
| Number of pages | 4 |
| Journal | Fibers and Polymers |
| Volume | 8 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 2007 |
| Externally published | Yes |
Keywords
- Extensibility
- Hygral expansion
- pH
- Relaxation shrinkage
- Wool fabric
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- Polymers and Plastics