Mason Archival Repository Service

Analytical Evaluation and Mechanistic Elucidation for Solvent Degradation of Polymeric Materials

Show simple item record

dc.contributor.advisor Weatherspoon, Gerald Daniels, Grant C
dc.creator Daniels, Grant C 2014-11-25 2015-03-24T15:23:19Z 2015-03-24T15:23:19Z 2015-03-24
dc.description.abstract Polymeric coating materials have been used for decades to protect various substrates from degradation, such as corrosion, which can cause failure of important aspects in vehicles and buildings. The proper removal of polymeric coating materials is as important as their protection of underlying substrates since improper removal will damage the substrate. Methylene chloride and phenol based removers have been utilized for this purpose for over 50 years. During which time little understanding of the mechanism for the degradation of polymeric materials from these solvents has been developed. This work employed two military polyurethane coatings in three different formulations: full, partial and clear. Simplified formulations and control mixtures of solvents commonly used in methylene chloride and phenol removers were developed in order to deconvolute analysis of the complex polymeric material and the solvent systems. The polymeric coatings were exposed to the different solvents and solvent solutions. Analyses were conducted utilizing multiple techniques to determine the mechanism for the degradation of polymeric coatings. These analyses revealed that methylene chloride solvated and swelled the coating while phenol degraded the polymer by nucleophilic attack. It was also determined that the addition of water to the solution significantly increased degradation. The enhanced degradation arose from the water molecule abstracting the proton from phenol, which increased its nucleophilicity.
dc.language.iso en en_US
dc.subject polymeric coatings en_US
dc.subject phenol en_US
dc.subject polyurethanes en_US
dc.subject methylene chloride en_US
dc.subject spectroscopy en_US
dc.title Analytical Evaluation and Mechanistic Elucidation for Solvent Degradation of Polymeric Materials en_US
dc.type Thesis en Master of Science in Chemistry en_US Master's en Chemistry en George Mason University en

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search MARS


My Account