Date of Award
Winter 12-13-2024
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Chemistry
First Advisor
Dr. Ram K. Gupta
Second Advisor
Dr. Khamis Siam
Third Advisor
Dr. John Franklin
Keywords
flame retardant, PU foams, density, close cell
Abstract
Polyurethanes (PUs) are defined as synthetic copolymers prepared using polyols and polyisocyanates. They have a wide range of applications in a variety of products, such as furniture, medical equipment, packaging, foams, coatings, elastomers, and adhesives. Out of all these, one of the most significant commercial products is polyurethane foams (PUFs). However, most of the raw materials used for PUFs production originate from non-renewable sources and due to their highly porous nature, these foams are highly flammable. It is considered essential to combine bio-based components to produce polyurethanes with good flame retardancy. Thus, introducing renewable polyol and halogen-free flame retardant are primary requirement to synthesize PUFs. In this research work, soybean oil (SO) was chemically modified into soybean oil polyol (SOP) through epoxidation and ring-opening reactions. The synthesized bio polyol is characterized using FT-IR, GPC, viscosity, and hydroxyl value. Also, on the basis of nitrogen, phosphorous and nitrogen-phosphorous compound containing three different halogen-free flame retardants (FRs) were introduced to reduce the flammability of PUFs. By adding different amounts of FRs, How synergetic effect of the mixture of nitrogen and phosphorous were affected on the thermal, mechanical and flammable properties were studied. In addition, morphological study was also performed for all the synthesize RPUFs. Results showed a decreasing trend in burning time after the addition of an increasing amount of FRs in PUFs. The lowest flame duration is 5.1 seconds and weight loss of 1.28% were observed for foam containing nitrogen and phosphorous containing FRs.
Recommended Citation
Chaudhari, Sujal A., "STUDY OF THE SYNERGISTIC EFFECT OF TWO DIFFERENT FLAME RETARDANTS IN SOY-BASED POLYURETHANE FOAMS" (2024). Electronic Theses & Dissertations. 612.
https://digitalcommons.pittstate.edu/etd/612
