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Open AccessArticle

Poly(Amide-imide) Aerogel Materials Produced via an Ice Templating Process

1
Department of Macromolecular Science & Engineering, Case Western Reserve University, Cleveland, OH 44106-7202, USA
2
Centre Catalá del Plástic, Universitat Politécnica de Catalunya. BarcelonaTech, 08022 Terrassa, Spain
*
Author to whom correspondence should be addressed.
Materials 2018, 11(2), 233; https://doi.org/10.3390/ma11020233
Received: 8 January 2018 / Revised: 26 January 2018 / Accepted: 1 February 2018 / Published: 3 February 2018
(This article belongs to the Special Issue Aerogels: Synthesis, Characterization and Application)
Low density composites of sodium montmorillonite and poly(amide-imide) polymers have been created using an ice templating method, which serves as an alternative to the often-difficult foaming of high temperature/high performance polymers. The starting polymer was received in the poly(amic acid) form which can be cured using heat, into a water insoluble amide-imide copolymer. The resulting materials have densities in the 0.05 g/cm3 range and have excellent mechanical properties. Using a tertiary amine as a processing aid provides for lower viscosity and allows more concentrated polymer solutions to be used. The concentration of the amine relative to the acid groups on the polymer backbone has been found to cause significant difference in the mechanical properties of the dried materials. The synthesis and characterization of low density versions of two poly(amide-imide) polymers and their composites with sodium montmorillonite clay are discussed in the present work. View Full-Text
Keywords: aerogel; clay; composite; poly(amide-imide); mechanical properties aerogel; clay; composite; poly(amide-imide); mechanical properties
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MDPI and ACS Style

Gawryla, M.D.; Arndt, E.M.; Sánchez-Soto, M.; Schiraldi, D.A. Poly(Amide-imide) Aerogel Materials Produced via an Ice Templating Process. Materials 2018, 11, 233.

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