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Showing 1 to 6 of 6 for “"aromatic polyimide"”.
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Characterization of the Integration of Additively Manufactured All-Aromatic Polyimide and Conductive Direct-Write Silver Inks
… direct ink write (UV-DIW) all-aromatic polyimide (PI) provides an opportunity to address these previous shortcomings previously due to its high-temperature stability (450C) and superior surface finish (relative to other AM processes). The primary goal of this thesis is to …
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Crystallization and melting behavior of an aromatic semicrystalline polyimide, LaRC CPI-2
… the crystallization and melting behavior of an aromatic semi crystalline polyimide known as LaRC CPI - 2 (Langley Research Center Crystalline rolyimide - second generation). This aromatic polyimide, a structural variant of the well known LaRC CPI, is synthesized froml 1,4-bis( 4-aminophenoxy-4' …
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Advancing Vat Photopolymerization of Photosensitive Polyimides: Process-Structure-Property Relationships
… performance, and are highly flammable. Aromatic polyimides have found broad adoption in aerospace, automotive, and electronics applications due to their exceptional thermal stability, mechanical strength, and chemical resistance. Their excellent dielectric properties are particularly …
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Vat Photopolymerization of High-Performance Materials through Investigation of Crosslinked Network Design and Light Scattering Modeling
… for VP resins has been completed recently for polyimides and highperformance elastomers by photocuring a scaffold around polymer precursors or polymer nanoparticles, respectively. Both of these materials are first shaped by printing a green part followed by thermal post-processing to achieve …
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Synthesis and Characterization of Novel Polyimide Gas Separation Membrane Material Systems
… High molecular weight soluble fully cyclized polyimides were successfully synthesized using a 1:1 molar ratio of dianhydride to diamine. The polyimides were film forming and were characterized by size exclusion chromatography (SEC), differential scanning calorimetry (DSC), thermogravimetric …
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Enabling New Material and Process Capabilities for Ultraviolet-Assisted Direct Ink Write Additive Manufacturing via Exploration of Material Rheology and Reactivity
… selection for UV-DIW including (1) an all-aromatic polyimide possessing a storage modulus above 1 GP a up to 400 °C (Chapter 4), (2) a styrene butadiene rubber (SBR) nanocomposite with elongation at break exceeding 300 % (Chapter 5), and (3) a dual-cure ink enabling the printing of inks …