Abstract
Covalent adaptable networks are frequently studied as alternatives to conventional thermosetting polymers because they can be recycled and reprocessed; however, the inclusion of dynamic covalent bonds within high-temperature (or high-performance) engineering thermoplastics remains largely unexplored. In this work, dynamic disulfide-containing thermoplastic polyimides were synthesized and compared to nondynamic thermoplastic polyimides. The thermomechanical properties of these polymers were examined by utilizing several techniques, including thermogravimetric analysis, differential scanning calorimetry, along with the use of the rheometric quartz crystal microbalance, and traditional dynamic mechanical analysis. The resulting experimental data suggest that the thermal stability of the dynamic compositions was slightly reduced in comparison to the nondynamic analogs, but the dynamic compositions exhibit a similar mechanical response under service conditions. The dynamic compositions also demonstrated significantly easier reprocessability via compression molding than their nondynamic counterparts.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2065-2072 |
| Number of pages | 8 |
| Journal | Macromolecules |
| Volume | 58 |
| Issue number | 4 |
| DOIs | |
| State | Published - Feb 25 2025 |
Funding
This work was supported by a NASA Space Technology Graduate Research Opportunity. This work also made use of the CLaMMP and MatCI Facilities, which have received support from the MRSEC Program (DMR-2308691) of the Materials Research Center at Northwestern University, the Center for Hierarchical Materials Design, and from Northwestern University. This work was also supported by National Science Foundation Grants OISE-1743748 and DMR-2308601.
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry