Date of Award
Summer 7-24-2026
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Materials Science
First Advisor
Dr. Ram k. Gupta
Second Advisor
Dr. Serif Uran
Third Advisor
Dr. Timothy Dawsey
Keywords
Polyurethane, Coating, Isocyanate, Vinyltrimethylsilane, bio-based
Abstract
In this study, bio-based polyurethane–urea films were successfully synthesized using soybean oil polyol (SOP), isophorone diisocyanate (IPDI), and ethylenediamine (EDA), followed by modification with varying concentrations of vinyltrimethylsilane (VTMS) to enhance their mechanical, thermal, and surface properties. The effect of VTMS incorporation on the structure–property relationships of the films was systematically investigated through tensile testing, hardness measurements, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), swelling behavior, gel content determination, and water contact angle analysis. The results demonstrated that VTMS significantly improved tensile strength and hardness due to increased intermolecular interactions and crosslink density within the polymer network, with optimal performance observed at 7.5 wt.% VTMS. Thermal analysis revealed typical multi-step degradation behavior with slight improvement in thermal stability and increased char residue at intermediate VTMS concentrations. Swelling and gel content studies confirmed the formation of highly crosslinked structures with enhanced solvent resistance. Furthermore, water contact angle measurements indicated improved surface hydrophobicity with increasing VTMS content, reaching a maximum value of 88.78° at 10 wt.% VTMS. Overall, the developed silane-modified SOP-based polyurethane–urea films exhibit improved structural stability, mechanical performance, and moisture resistance, protective coating materials.
Recommended Citation
Gelot, Ketankumar, "DEVELOPMENT OF BIO-BASED POLYUREA/URETHANE FILMS WITH VTMS ADDITIVES FOR ENHANCED STRUCTURAL AND FUNCTIONAL PROPERTIES" (2026). Electronic Theses & Dissertations. 848.
https://digitalcommons.pittstate.edu/etd/848
