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Effect of the pressure drop rate on cell nucleation in continuous processing of microcellular polymers
Abstract
Microllular plastics are cellular polymers characterized by cell densities greater than 10 9 cells/cm 3 and cells smaller than 10 μm. One of the critical steps in the continuous production of microcellular plastics is the promotion of high cell nucleation rates in a flowing polymer matrix. These high nucleation rates can be achieved by first forming a polymer/gas solution followed by rapidly decreasing the solubility of gas in the polymer. Since, in the processing range of interest, the gas solubility in the polymer decreases as the pressure decreases, a rapid pressure drop element, consisting of a nozzle, has been employed as a continuous microcellular nucleation device. In this paper, the effects of the pressure drop rate on the nucleation of cells and the cell density are discussed. The experimental results indicate that both the magnitude and the cell density are discussed. The experimental results indicate that both the magnitude and the rate of pressure drop play a strong role in microcellular processing. The pressure phenomenon affects the thermodynamic instability induced in the polymer/gas solution and the competition between cell nucleation and growth.
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Cited by
Mooney, D. J., Baldwin, D. F., Suh, N. P., Vacanti, J. P., & Langer, R. (1996) · Biomaterials · doi:10.1016/0142-9612(96)87284-x · Cited by 1,085
Self-citationNofar, M., & Park, C. B. (2014) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2014.04.001 · Cited by 531
Self-citationArchitecture and properties of anisotropic polymer composite scaffolds for bone tissue engineering
Mathieu, L. M., Mueller, T. L., Bourban, P.-E., Pioletti, D. P., Müller, R., & Månson, J.-A. E. (2006) · Biomaterials · doi:10.1016/j.biomaterials.2005.07.015 · Cited by 349
Strain hardening in polypropylenes and its role in extrusion foaming
Spitael, P., & Macosko, C. W. (2004) · Polymer Engineering & Science · doi:10.1002/pen.20214 · Cited by 260
Processing of Materials for Regenerative Medicine Using Supercritical Fluid Technology
García-González, C. A., Concheiro, A., & Alvarez-Lorenzo, C. (2015) · Bioconjugate Chemistry · doi:10.1021/bc5005922 · Cited by 112
Metadata
- Authors
- Park, C. B., Baldwin, D. F., & Suh, N. P.
- Venue
- Polymer Engineering & Science
- Publisher
- Wiley
- Published
- 1995-03
- Volume
- 35
- Issue
- 5
- Pages
- 432-440
- ISSN
- 0032-3888 (ISSN-L)
- 1548-2634
- OpenAlex
- W1981315183
- Cited by
- 427
- References
- 0
- FWCI
- 7.91
- Type
- journal article
- Language
- en
- Open access
- closed
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- Park, C. B., Baldwin, D. F., & Suh, N. P. (1995). Effect of the pressure drop rate on cell nucleation in continuous processing of microcellular polymers. Polymer Engineering & Science. https://doi.org/10.1002/pen.760350509
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