Visualization Study of Solid Poly (Ester-Amine Salt) Precursor Foaming Process

In this research, solid poly (ester-amine salt) precursor was used to prepare polyimide foams. The foaming process was observed by microscope, and effects of particle size on bubble growth were highlighted. The results showed that the powder particles with a size between 25 and 150 μm favor to grow...

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Bibliographic Details
Published in:Cellular polymers 2010, Vol.29 (1), p.45-57
Main Authors: ZHANG, Y. Z, ZHANG, G. C, HE, Z, SUN, X. F, RAJARATNAM, M
Format: Article
Language:English
Subjects:
Amines
Anhydrides
Applied sciences
Atoms & subatomic particles
Cellular
Composition
Exact sciences and technology
Foaming
Foams
Forms of application and semi-finished materials
Materials science
Morphology
Particle size
Particle size distribution
Polyesters
Polyimide resins
Polymer industry, paints, wood
Polymeric composites
Polymers
Precursors
Production processes
Salts
Technology of polymers
Visualization
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Summary:In this research, solid poly (ester-amine salt) precursor was used to prepare polyimide foams. The foaming process was observed by microscope, and effects of particle size on bubble growth were highlighted. The results showed that the powder particles with a size between 25 and 150 μm favor to grow into single bubble mesostructure, and the ones which grow into a multi-bubble mesostructure beyond this size. On the contrary, the bubble growth terminated when the particle size below 25 μm. Sieving was an effective method to narrow size distribution and uniform the particle size, which is of benefit to the formation of polyimide foams. After filtrated with 100 mesh sieve, the retreated particles were situated in optimal band to produce polyimide foams with single bubble mesostructure.
ISSN:0262-4893
1478-2421
DOI:10.1177/026248931002900103