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Russ Hall - Students
No full textBlack and white photo of two students standing in front of Russ Hall. The woman holds a jacket and book in one hand and the man holds his jacket over his shoulder. Possibly from the 1950s.https://digitalcommons.pittstate.edu/russbuilding/1164/thumbnail.jp
Russ Hall - Front Entrance
No full textBlack and white photo of Russ Hall\u27s front entrance. Two students stand and talk at the doors while others exit the building. Possibly taken in the 1950s.https://digitalcommons.pittstate.edu/russbuilding/1177/thumbnail.jp
Winter Campus
No full textBlack and white photos of campus during winter, mostly of trees and bushes..https://digitalcommons.pittstate.edu/russbuilding/1188/thumbnail.jp
CHEMICAL RECYCLING OF BIO-BASED POLYURETHANE FOAMS: EVALUATING BIO-BASED GLYCOLS IN COMPARISON TO PETROLEUM-BASED GLYCOLS
Get PDFThe paradigm shift towards bio-based polyurethane foams (bio-PUF) has significantly increased post-consumer waste. To address this issue, this research represents a novel approach to enhance sustainable development in the recycling industry by replacing traditional petroleum-based glycols with sustainable bio-based alternatives. This study explores the glycolysis of bio-PUF using bio-based SG-522 glycol and polyethylene glycol (PEG) for comparison. The findings from this research as outlined, reveal no significant differences in depolymerization time between the two glycols, achieving proper depolymerization and high recovery yields of over 95% after solvent purification. Comprehensive FT-IR and NMR analyses confirmed the successful degradation of bio-PUF and efficient polyol recovery. The resulting polyols exhibited higher OH values, viscosity, and acid values compared to virgin polyols. Despite the challenges posed by higher acid values in the recovered polyol (RP), we successfully regenerated bio-PUF, replacing up to 20% of virgin polyol with RP. The regenerated bio-PUF showed negligible differences in physical properties compared to those made with virgin polyols, with comparable or even higher compressive strength, indicating the robustness of the foam structures. This research highlights the potential of using bio-based glycols for depolymerizing waste PUF and incorporating RP in the sustainable production of PUF, aligning with circular economy principles. By demonstrating high recovery yields and the feasibility of incorporating recovered polyol into new PUFs, this study advances the circularity within the bio-PUF value chain, contributing to the broader goals of sustainable development and a bio-based economy
Gus Statue
No full textBlack and white perspective shot looking up at the Gus Gorilla statue located in front of the south (Oval-facing) entrance of the student centerhttps://digitalcommons.pittstate.edu/unihistoryphotos/1300/thumbnail.jp
Early Student Center
No full textBlack and white photo of the full building, taken in the mid 50shttps://digitalcommons.pittstate.edu/unihistoryphotos/1345/thumbnail.jp
Student Center
No full textStudent Center as seen from the Oval. Porter stands in the backgroundhttps://digitalcommons.pittstate.edu/unihistoryphotos/1347/thumbnail.jp
Students in Student Center
No full textStudents at tables with books and drinks, approximately the 1950shttps://digitalcommons.pittstate.edu/unihistoryphotos/1368/thumbnail.jp
Student Center Basement
No full textBasement social areahttps://digitalcommons.pittstate.edu/unihistoryphotos/1369/thumbnail.jp
Pride Prom, 2024 - 040
No full textAmber, co-founder of Q-Space, taking a polaroidhttps://digitalcommons.pittstate.edu/prideprom2024/1039/thumbnail.jp