Date of Award
Fall 12-13-2024
Document Type
Thesis
Degree Name
Master of Science in Chemistry (MSChem)
Department
Chemistry
First Advisor
Dr. Ram K. Gupta
Second Advisor
Dr. Khamis Siam
Third Advisor
Dr. Tim Dawsey
Abstract
Rigid polyurethane foams (PUFs) are widely used as thermal insulators due to their excellent mechanical properties and low thermal conductivity. However, their dependence on petrochemical-derived polyols and inherent flammability poses environmental and safety challenges. This study investigates the synthesis of bio-based rigid PUFs using canola oil polyol (COP), a sustainable alternative to petrochemical polyols. The research explores the incorporation of nitrogen and phosphorus-based reactive flame retardants, including diethyl phosphate (DEP), melamine (MA), and a novel compound (TDHTPP) synthesized from cyanuric chloride, diethyl phosphate, and vanillin, to enhance both flame retardancy and mechanical properties. Preliminary results demonstrate that PUFs containing 15gm TDHTPP exhibited the lowest weight loss in burning tests, comparable to MA-modified PUFs, indicating superior flame retardancy. Additionally, PUFs with DEP displayed the highest compression strength (~300 kPa), attributed to a more compact cellular structure, enhancing rigidity. Morphological analysis revealed that PUFs with 5gm DEP and 5gm TDHTPP achieved nearly 100% closed-cell content, optimal for thermal insulation applications. This research underscores the potential of bio-based polyols and nitrogen-phosphorus reactive flame retardants in producing environmentally friendly rigid PUFs with improved fire resistance and mechanical performance. The findings contribute to the advancement of sustainable materials, aligning with green chemistry and environmental protection goals.
Recommended Citation
patel, jonsi, "Effect of Nitrogen and Phosphorus in Rigid Polyurethane Foams Synthesized from Bio Derived Polyol" (2024). Electronic Theses & Dissertations. 620.
https://digitalcommons.pittstate.edu/etd/620
