Electronic Theses and Dissertations

Identifier

665

Date

2012

Document Type

Thesis

Degree Name

Master of Science

Major

Physics

Concentration

Materials Science

Committee Chair

Firouzeh Sabri

Committee Member

Jeffrey G Marchetta

Committee Member

John W Hanneken

Abstract

Polymer-based thermally insulating vessels are an attractive option for future space exploratory missions as well as energy conserving terresterial applications as an alternative to the conventional metal-based structures. Aerogel due to its unique set of material properties, such as superior thermal insulation and light weight, makes it an attractive for future space applications. Room Temperature (RT) and Low Temperature (LT)evaluation of the mechanical properties of Polyurea Crosslinked Silica Aerogel (PCSA) impregnated RTV655 was performed under increasing concentrations of PCSA. The effect of PCSAparticles size on the tensile behavior of RTV655 was also assessed and compared with the tensile behavior of neat RTV655 at both RT and LT. Incorporated PCSAparticles ranges were varied from 90-425µm and the concentrations tested were 25%, 50%, and 75% weight to the RTV655. The tensile properties of amine functionalized Polyoligomeric Silsesquioxane (POSS) crosslinked polyimide (PI)aerogel strips were also evaluated at both RT and LT and the effect of geometry and flexibility of PI-based aerogels was compared with the results obtained from PCSAimpregnated RTV 655 samples.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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