Maximal cell density predictions for compressible polymer foams

POLYMER

卷:54

Article

Kim, Yeongyoon^1,2  Park, Chul B.³  Chen, P.^2,4  Thompson, Russell B.^1,2 

[1] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[2] Univ Waterloo, Waterloo Inst Nanotechnol, Waterloo, ON N2L 3G1, Canada

[3] Univ Toronto, Dept Mech & Ind Engn, Microcellular Plast Mfg Lab, Toronto, ON M5S 3G8, Canada

[4] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

关键词: Polymer foam;    Self-consistent field theory;    Nano-cellular foam;   

DOI  :  10.1016/j.polymer.2012.11.067

来源: Elsevier

【 摘 要 】

Thermodynamic upper bounds for polymer foam cell densities are predicted using compressible self-consistent field theory. It is found that the incompressible limit always gives the highest, and therefore ultimate, upper bound. Qualitative comparisons between the compressible and incompressible cases agree, indicating that low temperatures and high blowing agent content should be used to achieve high cell densities. The inhomogeneous bubble structure reveals deviations from the expected homogeneous Sanchez-Lacombe equation of state, consistent with some experimental results. A generalized Sanchez -Lacombe equation of state is discussed in the context of its suitability as a simple alternative to the Simha-Somcynsky equation of state. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

Free