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
Thermal characterization of glycidyl azide polymer (GAP) and GAP-based binders for composite propellants
Date
2000-07-18
Author
Selim, K
Özkar, Saim
Yılmaz, Levent
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
383
views
0
downloads
Cite This
Differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) were used to investigate the thermal behavior of glycidyl azide polymer (GAP) and GAP-based binders, which are of potential interest for the development of high-performance energetic propellants. The glass transition temperature (T-g) and decomposition temperature (T-d) of pure GAP were found to be -45 and 242 degrees C, respectively. The energy released during decomposition (Delta H-d) was measured as 485 cal/g. The effect of the heating rate on these properties was also investigated. Then, to decrease its T-g, GAP was mixed with the plasticizers dioctiladipate (DOA) and bis-2,2-dinitropropyl acetal formal (BDNPA/F). The thermal characterization results showed that BDNPA/F is a suitable plasticiser for GAP-based propellants. Later, GAP was crosslinked by using the curing agent triisocyanate N-100 and a curing catalyst dibuthyltin dilaurate (DBTDL). The thermal characterization showed that crosslinking increases the T-g and decreases the T-d of GAP. The T-g of cured GAP was decreased to sufficiently low temperatures (-45 degrees C) by using BDNPA/F. The decomposition reaction-rate constants were calculated. It can be concluded that the binder developed by using GAP/N-100/BDNPA/F/DBTDL may meet the requirements of the properties that makes it useful for future propellant formulations. (C) 2000 John Wiley & Sons, Inc.
Subject Keywords
Materials Chemistry
,
General Chemistry
,
Surfaces, Coatings and Films
,
Polymers and Plastics
URI
https://hdl.handle.net/11511/34522
Journal
JOURNAL OF APPLIED POLYMER SCIENCE
DOI
https://doi.org/10.1002/(sici)1097-4628(20000718)77:3<538::aid-app9>3.0.co;2-x
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
Kinetics of polyurethane formation between glycidyl azide polymer and a triisocyanate
Keskin, S; Özkar, Saim (Wiley, 2001-07-25)
Kinetics of the polyurethane formation between glycidyl azide polymer (GAP) and a polyisocyanate, Desmodur N-100, were studied in the bulk state by using quantitative FTIR spectroscopy. The reaction was followed by monitoring the change in intensity of the absorption band at 2270 cm-l for NCO stretching in the IR spectrum, and was shown to obey second-order kinetics up to 50% conversion. The activation parameters were obtained from the evaluation of kinetic data at different temperatures in the range of 50-...
Thermal and dynamic mechanical properties of microwave and heat-cured poly(methyl methacrylate) used as dental base material
Muhtarogullari, IY; Dogan, A; Muhtarogullari, M; Usanmaz, Ali (Wiley, 1999-12-13)
In this study, the particle size distribution, molecular weight, thermal analysis (TGA) differential scanning calorimetry (DSC) and thermogravimetric analysis, and dynamic mechanical analysis (DMA) of poly(methyl methacrylate) used as dental base material were investigated. The commercial raw material used were prepared for microwave curing, and they were cured by microwave and conventional heat methods. The average particle size of the powder studied (103.1 mu m) were much larger than that of the commercia...
Indium tin oxide nanoparticles as anode for light-emitting diodes
Çırpan, Ali (Wiley, 2006-02-15)
Thin films of indium tin oxide (ITO) nanoparticles have been investigated as anode materials for polymer light-emitting diodes. A luminance efficiency (0.13 cd/ A), higher than that (0.09 cd/A) obtained in a control devices fabricated on conventional commercial ITO anodes were found. The thin films were made by spin coating of a suspension followed by annealing. The ITO nartoparticle films have a stable sheet resistance of 200 ohm/sq, and an optical transmittance greater than 86% over the range of 400-1000 ...
Preparation and Characterization of Polypropylene/Serpentine Composites
Tan, Semra; Tincer, İsmail Teoman (Wiley, 2011-07-15)
Composites of serpentine and polypropylene (PP) were prepared by twin-screw extrusion. Serpentine was collected as rocks from the Ankara-Beynam region and ground into powder with an average particle size of about 3 mu m for composite production. Both as-received (rock) and powdered serpentine were characterized. A silane coupling agent (SCA), gamma-aminopropyl triethoxy silane, was used for the surface treatment of serpentine. Mechanical properties of the composites were measured in terms of impact strength...
Electrosynthesis of polyfuran in acetonitrile-boron trifluoride-ethyl ether mixture and its device application
Tirkeş, Süha; Önal, Ahmet Muhtar (Wiley, 2007-01-15)
Electrochemical polymerization of furan was achieved in acetonitrile/boron trifluoride/ethyl ether (CH3 CN/BF3/EE) mixture in the presence of tetrabutylammonium tetrafluoroborate via constant potential electrolysis at 1.4 V versus Ag/AgCl. Electrochemical behavior of furan was investigated in the same solvent mixture of varying ratios, utilizing cyclic voltammetry. Free-standing polyfuran (PFu) films were obtained in CH3CN/BF3/EE mixture (2/4/4; v/v/v) and characterized using FTIR spectroscopic technique. S...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
K. Selim, S. Özkar, and L. Yılmaz, “Thermal characterization of glycidyl azide polymer (GAP) and GAP-based binders for composite propellants,”
JOURNAL OF APPLIED POLYMER SCIENCE
, pp. 538–546, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34522.