scholarly journals The Effect of Glycidyl Azide Polymer Grafted Tetrafunctional Isocyanate on Polytriazole Polyethylene Oxide-Tetrahydrofuran Elastomer and its Propellant Properties

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 278 ◽  
Author(s):  
Jinghui Hu ◽  
Weiqiang Tang ◽  
Yonghui Li ◽  
Jiyu He ◽  
Xiaoyan Guo ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Polyethylene Oxide ◽  
Mechanical Test ◽  
Glycidyl Azide Polymer ◽  
Interface Interaction ◽  
Ft Ir ◽  
Glycidyl Azide

A new energetic curing reagent, Glycidyl azide polymer grafted tetrafunctional isocyanate (N100-g-GAP) was synthesized and characterized by FT-IR and GPC approaches. Polytriazole polyethylene oxide-tetrahydrofuran (PTPET) elastomer was prepared by N100-g-GAP and alkynyl terminated polyethylene oxide-tetrahydrofuran (ATPET). The resulting PTPET elastomer was fully characterized by TGA, DMA, FTIR and mechanical test. The above analysis indicates that PTPET elastomers using N100-g-GAP as curing reagent have the potential for use in propellants. The overall formulation test of the composite propellants shows that this curing system can effectively enhance mechanical strength and bring a significant improvement in the interface interaction between the RDX & AP particles and binder matrix.

Energetic interpenetrating polymer network based on orthogonal azido–alkyne click and polyurethane for potential solid propellant

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64478-64485 ◽  
Author(s):  
Abbas Tanver ◽  
Mu-Hua Huang ◽  
Yunjun Luo ◽  
Syed Khalid ◽  
Tariq Hussain
Keyword(s):  
Low Temperature ◽  
Mechanical Strength ◽  
Solid Propellant ◽  
Polymer Network ◽  
Aerospace Industry ◽  
Interpenetrating Polymer Network ◽  
Glycidyl Azide Polymer ◽  
Energetic Polymer ◽  
Glycidyl Azide

High energetic propellants with synergistic mechanical strength are the prerequisites for aerospace industry and missile technology; though glycidyl azide polymer (GAP) is a renowned and a promising energetic polymer which shows poor mechanical and low-temperature properties.

scholarly journals Curing Behaviors of Alkynyl-Terminated Copolyether with Glycidyl Azide Polymer in Energetic Plasticizers

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1199 ◽  
Author(s):  
Jinghui Hu ◽  
Yina Liu ◽  
Kun Cong ◽  
Jiyu He ◽  
Rongjie Yang
Keyword(s):  
Diffusion Coefficient ◽  
Polyethylene Oxide ◽  
Photoelectron Spectroscopy ◽  
Gel Permeation Chromatography ◽  
Resonance Spectroscopy ◽  
Curing Process ◽  
Glycidyl Azide Polymer ◽  
The Difference ◽  
Energetic Plasticizers ◽  
Glycidyl Azide

Alkynyl-terminated polyethylene oxide−tetrahydrofuran (ATPET) and glycidyl azide polymer (GAP) could be linked through click-chemistry between the alkynyl and azide, and the product may serve a binder for solid propellants. The effects of the energetic plasticizers A3 [1:1 mixture of bis-(2,2-dinitropropy) acetal (BDNPA) and bis-(2,2-dinitropropyl) formal(BDNPN)] and Bu-NENA [N-butyl-N-(2nitroxyethyl) nitramine] on the curing reaction between ATPET and GAP have been studied. A diffusion-ordered nuclear magnetic resonance spectroscopy (DOSY-NMR) approach has been used to monitor the change in the diffusion coefficient of cross-linked polytriazole polyethylene oxide−tetrahydrofuran (PTPET). The change in the diffusion coefficient of PTPET with A3 plasticizer is significantly higher than that of PTPET with Bu-NENA. Viscosity analysis further highlighted the difference between A3 and Bu-NENA in the curing process—the curing curve of PTPET (A3) with time can be divided into two stages, with an inflection point being observed on the fourth day. For PTPET (Bu-NENA), in contrast, only one stage is seen. The above methods, together with gel permeation chromatography (GPC) analysis, revealed distinct effects of A3 and Bu-NENA on the curing process of PTPET. X-ray Photoelectron Spectroscopy (XPS) analysis showed that Bu-NENA has little effect on the valence oxidation of copper in the catalyst. Thermogravimetric (TG) analysis indicated that Bu-NENA helps to improve the thermal stability of the catalyst. After analysis of several possible factors by means of XPS, modeling with Material Studio and TG, the formation of molecular cages between Bu-NENA and copper is considered to be the reason for the above differences. In this article, GAP (Mn = 4000 g/mol) was used to replace GAP (Mn = 427 g/mol) to successfully synthesize the PTPET elastomer with Bu-NENA plasticizer. Mechanical data measured for the PTPET (Bu-NENA) sample included ε = 34.26 ± 2.98%, and σ = 0.198 ± 0.015 MPa.

Chemical Kinetic Studies on Polyurethane Formation of GAP and HTPB with IPDI by Using In Situ FT-IR Spectroscopy

2014 ◽  
Vol 1061-1062 ◽  
pp. 337-341
Author(s):  
Abbas Tanver ◽  
Mu Hua Huang ◽  
Yun Jun Luo ◽  
Ze Huan Hei
Keyword(s):  
Chemical Kinetics ◽  
High Performance ◽  
Activation Parameters ◽  
Kinetic Studies ◽  
Chemical Kinetic ◽  
Glycidyl Azide Polymer ◽  
Oh Groups ◽  
Ft Ir ◽  
Glycidyl Azide

The high-performance solid propellants play very important role in defense industry, which required highly energetic binders with good mechanical properties. In order to get the activation parameters for energetic binders, In-Situ FT-IR spectroscopic technique is used to study the chemical kinetics of glycidyl azide polymer (GAP) and hydroxyl terminated poly butadiene (HTPB) with isophorone diisocyanate (IPDI) at various temperatures. The reaction was followed by monitoring the change in intensity of the absorption band of NCO stretching at 2257cm-1and CO stretching at 1731cm-1. The polyurethane reaction has been found to be second order and the rate constant seems to be different between GAP/IPDI and HTPB/IPDI due to reactivity difference of OH groups. Dibutyl tin dilurate (DBTDL) was used as curing catalyst. By using Arrhenius and Eyring equations, the activation parameters were obtained at different temperatures (60, 70, 80 and 90°C). The apparent activation energy for the two systems GAP/IPDI and HTPB/IPDI were found to be 63.51 kJ mol-1and 41.06 kJ mol-1while the enthalpy and entropy of activation were found to be 62.35 kJ mol-1and-36.24 kJ.mol-1K-1, 39.08 J mol-1and-98.84 J mol-1K-1respectively.Key words: In-Situ FT-IR; glycidyl azide polymer (GAP); hydroxyl terminated poly butadiene (HTPB); chemical kinetics; polyurethane; dibutyl tin dilurate (DBTDL).

DEVELOPMENT OF A DIRECT INJECTION GAS-HYBRID ROCKET SYSTEM USING GLYCIDYL AZIDE POLYMER

2019 ◽  
Vol 18 (2) ◽  
pp. 157-170
Author(s):  
Yutaka Wada ◽  
S. Hatano ◽  
Ayana Banno ◽  
Yo Kawabata ◽  
Hiroshi Hasegawa ◽  
...  
Keyword(s):  
Direct Injection ◽  
Hybrid Rocket ◽  
Glycidyl Azide Polymer ◽  
Rocket System ◽  
Glycidyl Azide

Studies on structure property correlation of cross-linked glycidyl azide polymer

2009 ◽  
Vol 114 (6) ◽  
pp. 3360-3368 ◽  
Author(s):  
S. K. Manu ◽  
T. L. Varghese ◽  
S. Mathew ◽  
K. N. Ninan
Keyword(s):  
Structure Property ◽  
Glycidyl Azide Polymer ◽  
Property Correlation ◽  
Glycidyl Azide

scholarly journals Optimization of Curing Agents for Linear Difunctional Glycidyl Azide Polymer (GAP), with and without Isocyanate, for Binder Applications

2018 ◽  
Vol 15 (1) ◽  
pp. 206-222 ◽  
Author(s):  
Javaid Athar ◽  
Ravidra Soman ◽  
Namdeo Agawane ◽  
Rashmi Wagh ◽  
Mahadev Talwar
Keyword(s):  
Glycidyl Azide Polymer ◽  
Curing Agents ◽  
Glycidyl Azide
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