6533b855fe1ef96bd12afde2
RESEARCH PRODUCT
EFFECT OF MOISTURE ON THE BULK PROPERTIES OF SALTED POLY(CAPROAMIDE).
Giuseppe TitomanlioD. AciernoF. P. La MantiaAlberto Ciferrisubject
chemistry.chemical_classificationMoistureAtmospheric moistureChemistryCaproamideGeneral EngineeringAnalytical chemistrySalt (chemistry)Absorption (chemistry)Composite materialWater contentElastic modulusAtmospheric humiditydescription
The glass-transition temperature (Tg) and the elastic modulus of nylon-6 and its mixtures with 4% w/w LiCl and with 2% LiCl+3% LiBr were investigated. In one set of experiments care was taken to avoid absorption of moisture during the measurements. In another set of experiments, samples were exposed to atmospheric humidity for different lengths of time. Both unoriented and oriented specimens were investigated. The presence of 4% LiCl almost doubles the amount of moisture absorbed at equilibrium by nylon-6. The Tg was found to be greatly affected by the moisture content and by salt type. When strict precautions to exclude moisture are taken, the addition of 4% LiCl raises the Tg of nylon-6 by about 25°C. The elastic modulus of oriented samples is increased by the addition of salts provided moisture is completely absent. This beneficial effect is, however, completely eliminated when samples are allowed to equilibrate with atmospheric moisture.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1980-04-01 |