About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Aging Behavior of UV Curable PDMS Developed for Large-scale, High Viscosity Stereolithography |
Author(s) |
Hongtao Song, Nicholas Rodriguez, James Oakdale, Eric Duoss, Richard Crawford, Carolyn Seepersad |
On-Site Speaker (Planned) |
Hongtao Song |
Abstract Scope |
Polydimethylsiloxane (PDMS) elastomers have been used widely in academic and industrial applications. With a specially designed, photosensitive platinum-based catalyst, it is possible to fabricate PDMS parts with stereolithography by UV activated hydrosilylation. For long term applications, it is important to understand the aging behavior of the PDMS fabricated through UV hydrosylilation and how it compares with PDMS cured through normal hydrosylilation. In this paper, UV and thermal aging research is conducted on the UV curable PDMS. The results show that PDMS continues to crosslink throughout the aging experiment with an accompanying increase in stiffness and decrease in elongation. The tensile strength decreases slightly after aging. FTIR spectroscopy shows that no new chemical bonds or functional groups are generated through the aging process, meaning that no thermal degradation or polymer chain scissoring is occuring in the polymer matrix. Overall, this PDMS formulation shows excellent aging properties. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |