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Food Table
No full textShot of the food table at the receptionhttps://digitalcommons.pittstate.edu/nellydonlecture/1070/thumbnail.jp
Marla Presents
No full textMarla Day stands at the podium to introduce Nelly Don and answer: 1) Who or What is a Nelly Don? 2) Do we own any in the museum? And 3) What is a Handy Dandy?https://digitalcommons.pittstate.edu/nellydonlecture/1086/thumbnail.jp
Marla at Podium
No full textMarla Day speaks at the podium with pictures of Nelly Don on the presentation screenhttps://digitalcommons.pittstate.edu/nellydonlecture/1096/thumbnail.jp
Marla, Student, & Beach Pajamas
No full textMarla Day and a Student pose in front of the presentation screen, photos of beach pajamas are in the backgroundhttps://digitalcommons.pittstate.edu/nellydonlecture/1104/thumbnail.jp
Sara, Display Table
No full textSara DeCaro, Archivist, poses with the display table for the presentationhttps://digitalcommons.pittstate.edu/nellydonlecture/1122/thumbnail.jp
Guests Talk at the Lecture
No full textAngel Abshire, Olive Sullivan, and Meaghanne Mack talk at the lecturehttps://digitalcommons.pittstate.edu/nellydonlecture/1015/thumbnail.jp
EFFECTS OF NITROGEN, PHOSPHOROUS, AND NITROGEN-PHOSPHOROUS-BASED FLAME RETARDANTS ON PROPERTIES OF BIO-BASED POLYURETHANE FOAM
Get PDFRigid polyurethane foams (RPUFs) are widely used materials in buildings, coolers, and refrigerators due to their good thermal insulation properties. They are also used in automobiles due to their low density, sound adsorption, and mechanical properties. However, most of the raw materials used for their production originate from non-renewable sources. Also, these polymers are susceptible to fire due to their porous structure. For that, it is important to incorporate bio-based materials to produce polyurethanes along with flame retardants (FRs) that can efficiently quench a fire and suppress the release of toxic fumes. Herein, soybean oil, henceforth referred to as vegetable oil (VO), was chemically modified to a vegetable oil polyol (VP) through epoxidation and ring-opening reactions which was further characterized by Fourier-transform infrared (FTIR), gel permeation chromatography (GPC), viscosity, and hydroxyl value analysis. Also, nitrogen-phosphorus-based FR synthesized from diphenyl phosphinic acid (DPPA), and melamine (MA) was introduced. For comparison, three different types of FRs were used to make the RPUFs such as MA, dimethyl methyl phosphonate (DMMP), and diphenyl phosphinic melamine salt (DPPMA). Increasing concentrations of the FRs were added to the RPUFs to evaluate their effect on their properties. The physical, thermal, morphological, mechanical, and FR properties of the RPUFs were evaluated. There was a considerable decrease in the horizontal burning time as the control foam (foam without FRs) burnt for 62 seconds whereas after the addition of 23.75 wt.% (12 grams) of MA or DMMP, separately, the burning time decreased to 7 and 1 seconds, respectively. Upon the addition of 19.54 wt.% (12 grams) of DPPMA, the burning time decreased to 15 seconds
McCray Stage - Renovation
No full textMcCray stage during renovation. Scaffolding and parts lay on the stagehttps://digitalcommons.pittstate.edu/mccraybuilding/1035/thumbnail.jp
Unloading a Truck
No full textPeople unloading a truck. One wears a shirt with an organ piano on the back reading The Herman W. and Amelia H. Lay Family Concert O[??] Dallas Symphanyhttps://digitalcommons.pittstate.edu/mccraybuilding/1039/thumbnail.jp
McCray Meeting Space
No full textA room of chairs facing a podium. A cross is on a curtain behind the podium.https://digitalcommons.pittstate.edu/mccraybuilding/1048/thumbnail.jp