Poster Title

P-35 Optimization of Solvent-based NIR Hydroxyl Number Determination for Dendritic Polyols

Presenter Information

Hwuk Chan Woo, Andrews University

Abstract

Dendritic polymers, including hyperbranched polymers and dendrimers, are an emerging class of additives for a variety of industries such as the paints and coatings, plastics, adhesives, inks, and personal care products. The outer functional group type and density determines how these highly branched materials will perform and enhance the properties of consumer products. Near Infrared spectroscopy provides a direct, non-destructive analysis of this outer functionality specifically for the hydroxy group. This hydroxyl number analysis via NIR requires a high-boiling, polar, non-hydroxylated solvent such as DMSO to perform the analysis with sample amounts typically around 0.1 gram. Our research has shown that this NIR analysis works for the simultaneous determination of hydroxyl number and water content which is convenient but could be costly for characterizing expensive dendrimers, such as PAMAM dendrimers, which could cost $300/0.1 gram. Our research has focused on optimizing the sample concentration and solvents so as to provide the lowest cost analysis. This spectroscopic method is simple, direct, and does not require the time and sample preparation required with electrochemical titrations. This poster will highlight the challenges with NIR hydroxyl number analysis and solutions to overcome these difficulties.

Acknowledgments

Advisor: Ryan Hayes, Chemistry & Biochemistry

Location

Buller Hallway

Start Date

3-7-2014 2:30 PM

End Date

3-7-2014 4:00 PM

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COinS
 
Mar 7th, 2:30 PM Mar 7th, 4:00 PM

P-35 Optimization of Solvent-based NIR Hydroxyl Number Determination for Dendritic Polyols

Buller Hallway

Dendritic polymers, including hyperbranched polymers and dendrimers, are an emerging class of additives for a variety of industries such as the paints and coatings, plastics, adhesives, inks, and personal care products. The outer functional group type and density determines how these highly branched materials will perform and enhance the properties of consumer products. Near Infrared spectroscopy provides a direct, non-destructive analysis of this outer functionality specifically for the hydroxy group. This hydroxyl number analysis via NIR requires a high-boiling, polar, non-hydroxylated solvent such as DMSO to perform the analysis with sample amounts typically around 0.1 gram. Our research has shown that this NIR analysis works for the simultaneous determination of hydroxyl number and water content which is convenient but could be costly for characterizing expensive dendrimers, such as PAMAM dendrimers, which could cost $300/0.1 gram. Our research has focused on optimizing the sample concentration and solvents so as to provide the lowest cost analysis. This spectroscopic method is simple, direct, and does not require the time and sample preparation required with electrochemical titrations. This poster will highlight the challenges with NIR hydroxyl number analysis and solutions to overcome these difficulties.