Back to Search
Start Over
Long-term creep of polyphenylene sulfide (PPS) subjected to complex thermal histories: The effects of nonisothermal physical aging
- Source :
-
Polymer . Jul2009, Vol. 50 Issue 16, p4048-4055. 8p. - Publication Year :
- 2009
-
Abstract
- Abstract: The long-term viscoelastic behavior of polymeric materials used below the glass transition temperature (T g) is greatly affected by physical aging. In contrast to isothermal physical aging, long-term response under nonisothermal history has received far less attention. This paper reports experimental results and analytical methods of long-term creep behavior of polyphenylene sulfide (PPS) subjected to complex thermal histories in a temperature range below T g. To characterize the effects of aging, creep tests were performed using a dynamic mechanical analyzer (DMA). Besides the long-term data, short-term creep tests in identical thermal conditions were also analyzed; these were utilized with effective time theory to predict long-term response under both isothermal and nonisothermal temperature histories. The long-term compliance after a series of temperature changes was predicted by the effective time theory using the KAHR-a te model to obtain nonisothermal physical aging shift factors. Comparison of theoretical predictions with experimental data shows good agreement for various thermal histories. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00323861
- Volume :
- 50
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Polymer
- Publication Type :
- Academic Journal
- Accession number :
- 43412276
- Full Text :
- https://doi.org/10.1016/j.polymer.2009.06.046