Ultraviolet stability of polyimides and polyamide–imides
Abstract
Abstract The ultraviolet stability of polyimides and polyamide–imides was determined in both a wet and dry environment. Films have been exposed to these environments for 3000 and 6000 hr, respectively. The polymers are not stable to UV radiation (2900–4000 Å); serious deterioration of the mechanical properties occurs under both wet and dry conditions with the former giving rise to greater damage. The polyamide–imide polymer is more unstable to UV radiation than the two polyimides evaluated; however, it is more resistant to hydrolysis as indicated from rate data obtained from a kinetic analysis of the mechanical property degradation curves. The electrical properties of the polymers are relatively unaffected in the dry environment but begin to deteriorate as the polymer becomes brittle. In the wet environment these properties begin to deteriorate more rapidly. Dissipation factor and dielectric strength are the properties most affected.
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Thermoplastics are usually preferred over thermosets as a binder because of higher UV resistance, flexible molding conditions, higher toughness, and longer shelf life.
“Thermoplastics are usually preferred over thermosets as a binder because of the higher UV resistance [356], flexible molding conditions, higher toughness, and longer shelf life [357].”
From A comprehensive review of lunar-based manufacturing and construction (2024) · cites this paper as [356]
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A comprehensive review of lunar-based manufacturing and construction
Azami, M., Kazemi, Z., Moazen, S., Dubé, M., Potvin, M.-J., & Skonieczny, K. (2024) · Progress in Aerospace Sciences · doi:10.1016/j.paerosci.2024.101045 · Cited by 57 · see citing works
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- Authors
- Alvino, W. M.
- Corresponding author
- Alvino, W. M.
- Venue
- Journal of Applied Polymer Science
- Publisher
- Wiley
- Published
- 1971-09
- Volume
- 15
- Issue
- 9
- Pages
- 2123-2140
- ISSN
- 0021-8995 (ISSN-L)
- 1097-4628
- OpenAlex
- W2077124476
- Cited by
- 25
- References
- 8
- Citations by year
- 2024: 2 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 2 · 2014: 1 · 2013: 1
- FWCI
- 2.29
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Applied Polymer Science (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Synthesis and properties of polymers
- Physical Sciences › Materials Science › Materials Chemistry › High voltage insulation and dielectric phenomena
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer Science and PVC
- Keywords
- polyimide, poly(amide-imide), UV stability, UV degradation, hydrolytic stability, mechanical property degradation, loss tangent, dielectric strength, polymer films
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