Solid-state microcellular polycarbonate foams. I. The steady-state process space using subcritical carbon dioxide.(Report): An article from: Polymer Engineering and Science
Book Details
Author(s)John E. Weller, Vipin Kumar
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB004CQ63JK
ISBN-13978B004CQ63J7
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on November 1, 2010. The length of the article is 8108 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: The process parameters for production of solid-state microcellular polycarbonate using subcritical [CO.sub.2] were explored. Sufficiently long foaming times were used to produce foams, where cell growth had completed, resulting in steady-state structures. A wide range of foaming temperatures and saturation pressures below the critical pressure of [CO.sub.2] were investigated, establishing the steady state process space for this polymer-gas system. Processing conditions are presented that produce polycarbonate foams where both the foam density and the average cell size can be controlled. The process space showed that we could produce foams at a constant density, while varying the cell size by and order of magnitude. At a relative density of 0.5, the average cell size could be varied from 4 to 40 [micro]m. The ability to produce such a family of foams opens the possibility to explore the effect of micro-structure, like cell size on the properties of cellular materials. It was found that the minimum foaming temperature for a given concentration of [CO.sub.2], determined from the process space, agrees well with the predicted glass transition temperature of the gas-polymer solution. A characterization of the average cell size, cell size distribution, and cell nucleation density for this system is also reported. POLYM. ENG. SCI., 50:2160-2169, 2010. [C] 2010 Society of Plastics Engineers
Citation Details
Title: Solid-state microcellular polycarbonate foams. I. The steady-state process space using subcritical carbon dioxide.(Report)
Author: John E. Weller
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: November 1, 2010
Publisher: Society of Plastics Engineers, Inc.
Volume: 50 Issue: 11 Page: 2160(10)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: The process parameters for production of solid-state microcellular polycarbonate using subcritical [CO.sub.2] were explored. Sufficiently long foaming times were used to produce foams, where cell growth had completed, resulting in steady-state structures. A wide range of foaming temperatures and saturation pressures below the critical pressure of [CO.sub.2] were investigated, establishing the steady state process space for this polymer-gas system. Processing conditions are presented that produce polycarbonate foams where both the foam density and the average cell size can be controlled. The process space showed that we could produce foams at a constant density, while varying the cell size by and order of magnitude. At a relative density of 0.5, the average cell size could be varied from 4 to 40 [micro]m. The ability to produce such a family of foams opens the possibility to explore the effect of micro-structure, like cell size on the properties of cellular materials. It was found that the minimum foaming temperature for a given concentration of [CO.sub.2], determined from the process space, agrees well with the predicted glass transition temperature of the gas-polymer solution. A characterization of the average cell size, cell size distribution, and cell nucleation density for this system is also reported. POLYM. ENG. SCI., 50:2160-2169, 2010. [C] 2010 Society of Plastics Engineers
Citation Details
Title: Solid-state microcellular polycarbonate foams. I. The steady-state process space using subcritical carbon dioxide.(Report)
Author: John E. Weller
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: November 1, 2010
Publisher: Society of Plastics Engineers, Inc.
Volume: 50 Issue: 11 Page: 2160(10)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
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