This paper describes methodologies that have been developed for studying the physical aging of free-standing thin polymer films and its effect on gas permeability. Both solution casting and spin coating methods were used to obtain thin polysulfone films having thicknesses in the range of 400-1000 nm
A comparative DSC method for physical aging measurement of polymers
β Scribed by Z.N. Qi; Z.H. Wan; Y.P. Chen
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 293 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0142-9418
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
This paper compares four alternative statistical methods for the analysis of repeated measures data. The data set involves fatty acid composition of red blood cell membrane examined after acute MI and is characterized by a moderate sample size, unbalanced repeated measures and high within-individual
## Abstract A method of moments has been formulated for the determination of the diffusivity of a gas in a polymer from a step response in a continuous permeation chamber. Contributions of system components other than the polymer are easily factored out to determine the contribution of the polymer