Date of Submission

Spring 2024

Academic Program

Chemistry and Biochemistry

Project Advisor 1

Chris LaFratta

Abstract/Artist's Statement

In house studies have been conducted with the photopolymerization anomalies observed by photoinitiator ethyl(2,4,6-trimethylbenzoyl) phenylphosphinate (TPO-L). In the process of photopolymerization with a resin of TPO-L and monomer, despite being unable to absorb at 532 nm, TPO-L is still able to undergo radical formation and initiate polymerization. This experiment seeks to determine whether the heat intensity of the focal point of both an ultrafast Ti:Sa oscillator laser and a Nd:YAG CW laser potentially played a role in TPO-L’s reactivity with green light. The heat study took place on a macroscale using heat sensitive hydrogels as novel thermal sensors. These polymerized hydrogels were measured for structural changes with increasing temperature while suspended in water and resin, and then compared to observed changes when in the presence of the focal point of the laser of unknown heat. This work seeks to utilize a new approach in analyzing heat to elucidate the relationship between TPO-L and the focal point of a laser.

Open Access Agreement

On-Campus only

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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