Date Approved

2019

Degree Type

Campus Only Thesis

Degree Name

Master of Science (MS)

Department

Engineering Technology

Committee Member

Vijay Mannari, Ph.D

Committee Member

Subhas Ghosh, Ph.D

Committee Member

Donald Snyder, Ph.D

Abstract

In the present work, polyurethane resins have been synthesized using soybean oil based polyols (> 80% bio-renewable content) as a primary component. To overcome some of the limitations associated with soft and flexible structure of soy-based polyols, the resin has been designed with two unique set of functional groups –OH and acrylate, as a means of crosslinking sites. Such resin system can be cured by two independent cure mechanisms – (a) thermal (or ambient) curing of –OH groups by use of isocyanate cross-linkers, and (b) by UV-curing of acrylate functional groups using appropriate photoinitiators. Thus, this dual-curable system can provide a means to control the degree of curing and hence the thermo-mechanical properties and performance of these coatings. The study shows that dual-cure coatings with high bio-based content can be successfully formulated and that their properties can be varied by controlling the degree of cure reactions.

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