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Investigating the Effect of Plasma and Solvent Treatments on Ammonium Perchlorate Wettability and Interfacial Chemistry.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Investigating the Effect of Plasma and Solvent Treatments on Ammonium Perchlorate Wettability and Interfacial Chemistry./
Author:	Cortes, Aaren Scott.
Description:	1 online resource (103 pages)
Notes:	Source: Masters Abstracts International, Volume: 85-05.
Contained By:	Masters Abstracts International85-05.
Subject:	Aerospace engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9798380849418

Investigating the Effect of Plasma and Solvent Treatments on Ammonium Perchlorate Wettability and Interfacial Chemistry.
Cortes, Aaren Scott.

Investigating the Effect of Plasma and Solvent Treatments on Ammonium Perchlorate Wettability and Interfacial Chemistry. - 1 online resource (103 pages)

Source: Masters Abstracts International, Volume: 85-05.

Thesis (M.S.)--California State University, Long Beach, 2023.

Includes bibliographical references

Ammonium perchlorate (AP) and hydroxyl-terminated polybutadiene (HTPB) have been used as solid rocket propellant ingredients for over 70 years. A wide range of research has not been conducted on the interfacial chemistry of the two materials. Understanding the surface chemistry of HTPB on AP allows for increased control of the mechanical properties of the composite propellant. Understanding how to alter the surface of AP was the baseline of this study. Sessile droplet experiments were used to understand the wettability of ammonium perchlorate. Droplets were placed on AP pressed pellets, AP single crystals, plasma-treated AP single crystals, and AP single crystals that were treated in distilled water, methanol, toluene, hexanes, ethyl methyl ketone, ethyl acetate, n-dodecane, ethylene glycol, and various Tepanol® and water solutions. Treated samples were necessary to determine the adjustability of ammonium perchlorate's surface chemistry. Solvents used for treatment were selected based on vapor pressure, solubility, polarity, and interaction with AP. A high-speed camera was used to collect images of the droplets, images were then analyzed using ImageJ software. Contact angles were found and analyzed for each sample. Comparison of AP single crystals and AP pressed pellets allowed for a baseline understanding of the surfaces. The difference in wetting indicated the influence of Cassie state versus Wenzel state. Additionally, surface characterization experiments were conducted to understand the changes the surfaces underwent when treated in solvents or plasma treated. The experiments were conducted using a nanoindenter, scanning electron microscope, Fourier transform infrared spectroscopy, and x-ray photoelectron spectroscopy. Results indicate that solvents and plasma treatment could influence the surface chemistry of AP. Data from the experiment provided insight into the physical and chemical changes that occurred.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798380849418Subjects--Topical Terms:

686400
Aerospace engineering.
Subjects--Index Terms:

Ammonium perchlorateIndex Terms--Genre/Form:

554714
Electronic books.

Investigating the Effect of Plasma and Solvent Treatments on Ammonium Perchlorate Wettability and Interfacial Chemistry.
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