BEHAVIOUR OF HTPB-POLYURETHANE ELASTOMER MATERIAL REINFORCED WITH MICRO AND NANO PARTICLES

Download

Emre Erten - MS tez - Final.pdf

Date

2022-8

Author

Erten, Emre

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

403
views

1014
downloads

Hydroxyl-Terminated-Polybutadiene Polyurethane (HTPB-PU) elastomer materials are mainly used in the “liner” layer of solid propellant rocket motor cases. The required levels of mechanical and thermal properties are obtained by reinforcing this elastomer matrix with approximately 10 wt% micron-sized carbon black (mCB) particles. Therefore, the main purpose of this study was to investigate effects of mCB alone and then when used together with 3 wt% nano-sized carbon black (nCB), micron-sized zirconia (mZrO2), nano-sized titania (nTiO2) and silica (nSiO2) on the mechanical and thermal properties of HTPB-PU elastomer matrix. The main technique used for the production of unfilled and filled HTPB-PU specimens was mechanical mixing. Tension tests conducted at 70°C, 23°C and -40°C revealed that use of all filler combinations improved all mechanical properties of HTPB-PU elastomer matrix at all temperatures. On the other hand, compared to others, replacement of total 10 wt% mCB particles with 3 wt% nCB particles resulted in highest level of improvements. Various thermal analyses conducted for all specimen compositions indicated that use of 10 wt% total filler content had slight influences on the thermal properties of the HTPB-PU elastomer matrix.

Subject Keywords

Hydroxyl-Terminated-Polybutadiene (HTPB), Polyurethane (PU), Carbon Black, Zirconia, Titania, Silica

URI

https://hdl.handle.net/11511/99492

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Mechanical properties of HTPB-IPDI-based elastomers Haska, SB; Bayramli, E; Pekel, F; Özkar, Saim (1997-06-20) A polyurethane elastomer having mechanical and adhesive properties suitable for liner applications in solid rocket propellants was developed using HTPB as the prepolymer and IPDI as the curing agent. The effects of the NCO/OH ratio (R value) and the triol/diol ratio on the mechanical properties of the polyurethane matrix were investigated. The reaction of HTPB and IPDI is followed by monitoring the changes in the IR absorption bands of the NCO stretching at 2255 cm(-1) and the CO stretching at 1730 cm(-1). ...
Behavior of reinforced concrete deep beam with web openings strengthened with (CFRP) sheet Jasim, Waleed A.; Tahnat, Yazan B. Abu; Halahla, Abdulsamee M. (2020-08-01) Deep beams are used in various applications in reinforced concrete (R.C.) structures. There have been continuous efforts to enhance and improve the performance of these crucial elements in (R.C.) structures by using several strengthening techniques such as using the carbon fiber-reinforced polymer (CFRP). However, by exploring the literature, none of the previously conducted experimental tests have studied the propagation of cracks beneath the (CFRP) sheets. In this research, the propagation of the first di...
Enhancing thermal conductivity of epoxy with a binary filler system of h-BN platelets and Al2O3 nanoparticles Yetgin, Hasan; Veziroglu, Salih; Aktas, Oral Cenk; Yalçınkaya, Tuncay (Elsevier BV, 2020-04-01) Epoxy resin is a common adhesive bonding material used to join dissimilar materials, especially in the electronics and aerospace industries. However, its low thermal conductivity and high coefficient of thermal expansion limit the direct use of epoxy in practical applications. In order to improve thermo-mechanical properties, we have prepared a series of epoxy composites using a binary system of hexagonal-boron nitride (h-BN) and aluminum oxide (Al2O3) fillers and analyzed the effect of the ratio of these f...
Experimental and modelling study on nonlinear time-dependent behaviour of thin spray-on liner Güner, Doğukan; Öztürk, Hasan (Elsevier BV, 2019-02-01) Thin spray-on liners (TSLs) are fast-setting multi component polymeric materials applied on rock or coal surface with a thickness of 2-5 mm that have fairly high tensile strength, adhesion, and elongation capabilities. Compared to conventional surface support elements, TSLs with polymer content exhibit different material responses over time. As a matter of fact, the creep behaviour of TSLs under a constant load has a significance for the evaluation of the long term performances of TSLs. This paper investiga...
MECHANICAL PROPERTIES OF REPAIRED CARBON FIBER REINFORCED POLYMER COMPOSITES Sonat, Emine Evren; Özerinç, Sezer; Department of Mechanical Engineering (2021-12-10) Carbon fiber reinforced polymer (CFRP) composites are increasingly used in the aerospace industry due to their high specific strength compared to conventional metallic materials. However, a significant shortcoming of these composites is their increased susceptibility to damage. Structural repair is a common method to restore the load-carrying capacity of a damaged part when the damage size exceeds the pre-defined tolerances. Scarf and stepped bonded repair methods are the primary choice for cases that requi...

Citation Formats

E. Erten, “BEHAVIOUR OF HTPB-POLYURETHANE ELASTOMER MATERIAL REINFORCED WITH MICRO AND NANO PARTICLES,” M.S. - Master of Science, Middle East Technical University, 2022.