![](/images/graphics-bg.png)
CO2 Induced Foaming Behavior of Polystyrene near the Glass Transition
Author
Source
International Journal of Polymer Science
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-17
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
This paper examines the effect of high-pressure carbon dioxide on the foaming process in polystyrene near the glass transition temperature and the foaming was studied using cylindrical high-pressure view cell with two optical windows.
This technique has potential applications in the shape foaming of polymers at lower temperatures, dye impregnation, and the foaming of polystyrene.
Three sets of experiments were carried out at operating temperatures of 50, 70, and 100°C, each over a range of pressures from 24 to 120 bar.
Foaming was not observed when the polymer was initially at conditions below Tg but was observed above Tg.
The nucleation appeared to occur randomly leading to subsequent bubble growth from these sites, with maximum radius of 0.02–0.83 mm.
Three models were applied on the foaming experimental data.
Variable diffusivity and viscosity model (Model C) was applied to assess the experimental data with the WLF equation.
The model shows very good agreement by using realistic parameter values.
The expansion occurs by diffusion of a dissolved gas from the supersaturated polymer envelope into the bubble.
American Psychological Association (APA)
Al-Enezi, Salah. 2017. CO2 Induced Foaming Behavior of Polystyrene near the Glass Transition. International Journal of Polymer Science،Vol. 2017, no. 2017, pp.1-15.
https://search.emarefa.net/detail/BIM-1169219
Modern Language Association (MLA)
Al-Enezi, Salah. CO2 Induced Foaming Behavior of Polystyrene near the Glass Transition. International Journal of Polymer Science No. 2017 (2017), pp.1-15.
https://search.emarefa.net/detail/BIM-1169219
American Medical Association (AMA)
Al-Enezi, Salah. CO2 Induced Foaming Behavior of Polystyrene near the Glass Transition. International Journal of Polymer Science. 2017. Vol. 2017, no. 2017, pp.1-15.
https://search.emarefa.net/detail/BIM-1169219
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1169219