Date of Award


Degree Name

Master of Science


Chemical and Paper Engineering

First Advisor

Dr. Richard Valley

Second Advisor

Dr. James E. Kline

Access Setting

Masters Thesis-Open Access


The sizing chemical ASA is emulsified to make i t compatible with the papermaking process. Unfortunately, emulsified ASA is chemically reactive with water at the elevated temperatures found in papermaking systems. As an alternative, encapsulated ASA was made and investigated for its stability towards water at elevated temperatures.

A handsheet procedure was developed to analyze emulsified and encapsulated ASA. It was concluded that the procedure gave statistically reproducible results. Investigations with the procedure revealed important variables concerning the laboratory and m ill application of ASA. Evidence indicated that retention of ASA was critical to sizing development.

Encapsulated ASA made for this study was not superior to emulsified ASA with respect to stability. It was hypothesized that the pH at which the capsules were manufactured led to a chemical reaction of ASA that rendered it useless for sizing.