Homogeneous nanocellular foams from styrenic-acrylic polymer blends
Source abstract
Abstract
Nano-cellular foams were successfully produced from blends of styrenic and acrylic polymers by a two-step batch foaming process using carbon dioxide as the blowing agent. Addition of poly(ethyl methacrylate) or poly(methyl methacrylate-co-ethyl acrylate) to styrene-acrylonitrile copolymers, even at a low level, resulted in very homogeneous foams with smaller cell size and narrower cell size distribution than with the individual polymers. The best nanofoams produced from miscible blends have average cell sizes below 100 nm, cell densities up to 5 × 1015cm−3and medium-to-low relative densities (void fraction between 60 and 70%). Contrary to previous studies, it was found that blends with lower CO2solubility gave higher cell density nanofoams. This suggests new mechanisms for the nucleation of foams from these blends at the nanoscale.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Polymer Foaming and Composites · Polymer composites and self-healing · Lignin and Wood Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
Show source-provided references
1. 10.1016/j.polymer.2013.03.05210.1016/j.polymer.2013.03.052 ↗
2. 10.1002/macp.20035007510.1002/macp.200350075 ↗
3. 10.1039/c2ra01268e10.1039/c2ra01268e ↗
4. 10.1002/pen.76030201010.1002/pen.760302010 ↗
5. 10.1021/ma060735+10.1021/ma060735+ ↗
6. 16. Costeux S. : Nanoporous Polymeric foam having high cell density without nanofiller. Int. Patent Appl. WO 2011112352, filed March 10, 2010 (32 pp.), assigned to Dow Global Technologies LLC, USA.
7. 13. Costeux S. : Nanoporous polymeric foam having high porosity. Int. Patent Appl. WO 2011066060, filed November 25, 2009 (33 pp.), assigned to Dow Global Technologies LLC, USA.
8. 12. Pinto J. , Rodríguez-Pérez M.A. , de Saja J.A. , Dumon M. , García R. , and Dietz C. : Relationship between the nano-structured morphology of PMMA/MAM blends and the nanocellular structure of foams produced from these materials. Presented at the Society of Plastics Engineers FOAMS 2011 Conference, Iselin, NJ, September 2011.
9. 10.1002/mame.20100034610.1002/mame.201000346 ↗
10. 10.1007/12_2009_3210.1007/12_2009_32 ↗
11. 17. Costeux S. , Jeon H. , Bunker S. , and Khan I. : Nanocellular foams from acrylic polymers: Experiments and modeling. Presented at the Society of Plastics Engineers FOAMS 2012 Conference, Barcelona, Spain, September 2012.
12. 10.1557/JMR.1994.073110.1557/JMR.1994.0731 ↗
13. 10.1016/j.polymer.2009.09.02010.1016/j.polymer.2009.09.020 ↗
14. 10.1016/j.polymer.2011.04.04910.1016/j.polymer.2011.04.049 ↗
15. 10.1021/ma001291z10.1021/ma001291z ↗
16. 10.1016/j.supflu.2011.04.02210.1016/j.supflu.2011.04.022 ↗
17. 10.1021/ma051757j10.1021/ma051757j ↗
18. 10.1002/mame.20070025710.1002/mame.200700257 ↗
19. 14. Costeux S. and Zhu L. : Thermoplastic nanocellular foams with low relative density using CO2 as the blowing agent. Presented at the Society of Plastics Engineers FOAMS 2011 Conference, Iselin, NJ, September 2011.
20. 10.1021/ma00050a05710.1021/ma00050a057 ↗
21. 20. Costeux S. : Polymeric nanofoam containing acrylonitrile-based copolymers blends with (meth)acrylic polymers. Int. Patent Appl. WO 2013048761, filed September 30, 2011 (20 pp.), assigned to Dow Global Technologies LLC, USA.
22. 10.1016/0032-3861(87)90169-810.1016/0032-3861(87)90169-8 ↗
23. 10.1016/0032-3861(87)90261-810.1016/0032-3861(87)90261-8 ↗
24. 10.1021/ja003936g10.1021/ja003936g ↗
25. 10.1002/pen.76027070210.1002/pen.760270702 ↗
26. 10.1021/ja027858410.1021/ja0278584 ↗