Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Improvement of rheological, mechanical and interface properties of solid rocket motor liner
Download
12626156.pdf
Date
2021-2-11
Author
Aslan, Onurcan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
504
views
87
downloads
Cite This
This study aims to improvethe mechanical, rheological, and interface propertiesofthe currently used liner formulation (referred to as the standard liner) based on carbon black filled polyurethanestructure.Two types of carbon black powders (Thermax N-991 and Printex-U) were used as fillers inHydroxyl-Terminated Polybutadiene(HTPB) -Isophorone Diisocyanate(IPDI)based polyurethane liner. Three different dispersing agents (alkylammonium salt of a high molecular-weight copolymer, high molecular-weight copolymer with pigment affinic groups, and hydroxyl functional silicone modified polyacrylate) were used in this study. Alkylammonium salt of a high molecular-weight copolymerdispersing agent wasdeterminedthe most effectiveaccording to rheologicalandmechanical test results and particle size analyses. The particle size was lowered from 521 nm to 392 nm for Thermax N-991 and from 550 nm to 263 nm for Printex-Uwhen the dispersant agent (alkylammonium salt of a high molecular-weight copolymer) was used. The tensile strength and the elongation at break values of the standard polyurethane liner were 1.3 MPa and 270percent, respectively,and they were improved to 1.77 MPaand 370percent, respectively, when 10 weight percent of Printex-Uwere addedin the polyurethane liner. Furthermore, the tensile strength and the elongation at break values of the polyurethane liner were improved to1.88 MPaand410percent, respectively,with the addition of 2weight percentof alkylammonium salt of a high molecular weight copolymerdispersing agent based on the amount of carbon black. The viscosity of the carbon black filled liner formulation wasalsodecreased about two folds; thus, thepot-lifeof the polyurethane linerwas extended up to 53percent by adding the dispersing agent. Moreover, the effective dispersion of carbon black particles made thepolyurethaneliner more resistant to the plasticizer migrationat the interface.It is concluded that the use of alkylammonium salt of a high molecular weight copolymerdispersing agent improves mechanical, rheological, and interface propertiesof thepolyurethane liner containing 10weight percentof Printex-Ucarbon black.
Subject Keywords
Liner,
,
Dispersing agent
,
Mechanical properties of liner
,
Rheological properties of liner
,
Liner-Propellant interface
URI
https://hdl.handle.net/11511/89655
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). ...
Fabrication of a promising immobilization platform based on electrochemical synthesis of a conjugated polymer
Buber, Ece; SÖYLEMEZ, SANİYE; UDUM, YASEMİN; Toppare, Levent Kamil (2018-07-01)
Since conjugated polymers are an important class of materials with remarkable properties in biosensor applications, in this study, a novel glucose biosensor based on a conjugated polymer was fabricated via the electropolymerization of the monomer 10,13-bis(4-hexylthiophen-2-yl)dipyridol[3,2-a:2',3'-c]phenazine onto a graphite electrode surface. Glucose oxidase (GOx) was used as the model biological recognition element. As a result of the enzymatic reaction between GOx and glucose, the glucose amount was det...
Improvement in mechanical, electrical, and shape memory properties of the polystyrene-based carbon fiber-reinforced polymer composites containing carbon nanotubes
Erkmen, Berrak; Bayram, Göknur (2021-02-01)
Carbon fiber-reinforced polymers based on polystyrene matrix containing elastomer and carbon nanotubes (CNTs) were produced by compression molding. The effects of carbon fabric (CF) concentration and silane treatment on the morphology, mechanical, electrical, and shape memory properties of the multilayer composites were investigated. The SEM analyses showed that fibers of the silane-treated CFs were more homogeneously covered with the polymer layers than the untreated CFs. The tensile strength and modulus o...
Review of magnesium-based biomaterials and their applications
Sezer, Nurettin; Evis, Zafer; Kayhan, Said Murat; Tahmasebifar, Aydin; Koc, Muammer (2018-03-01)
In biomedical applications, the conventionally used metallic materials, including stainless steel, Co-based alloys and Ti alloys, often times exhibit unsatisfactory results such as stress shielding and metal ion releases. Secondary surgical operation(s) usually become inevitable to prevent long term exposure of body with the toxic implant contents. The metallic biomaterials are being revolutionized with the development of biodegradable materials including several metals, alloys, and metallic glasses. As suc...
Characterization of non-Fickian moisture absorption in thermosetting polymers
Güloğlu, Görkem Eğemen; Altan, M. Cengiz (2015-05-22)
© 2015 AIP Publishing LLC.A recently developed moisture absorption model for thermosetting polymers that combines the non-Fickian, diffusion hindrance effects and three-dimensional anisotropy is introduced. The hindered diffusion model is shown to predict both short term Fickian and long term anomalous moisture absorption behavior often observed in thermosetting polymers and their composites. The salient characteristics of long term moisture uptake such as the equilibrium moisture content and the effect of ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
O. Aslan, “Improvement of rheological, mechanical and interface properties of solid rocket motor liner,” M.S. - Master of Science, Middle East Technical University, 2021.