Journal of Thermal Analysis and Calorimetry

, Volume 124, Issue 1, pp 107–115 | Cite as

Properties and application of a novel type of glycidyl azide polymer modified double-base spherical powders

  • Yanguang Wu
  • Zhen Ge
  • Yunjun Luo


GAP modified double-base powder was prepared by an internal solution method and applied in cross-linked modified double-base propellants. It was found that if GAP content was not more than 30 %, the modified double-base powders had high roundness rate, no bonding between the particles and excellent fluidity. The median diameter (d 50) of powders was decreased from 90.24 to 72.41 μm when the amount of GAP increased from 0.0 to 30.0 %. The thermal decomposition peak temperatures of –N3 and GAP’s main chain were found to be lower for the 10.0, 20.0 and 30.0 % GAP modified powders than the corresponding peak temperatures for pure GAP. The drop mass impact sensitivity of the modified powders is reduced as the mass ratio of GAP increases. It was experimentally shown that GAP modified double-base powders can improve the mechanical characteristics of the propellant with a maximum tensile strength (σ m) between 0.45 MPa < σ m < 1.18 MPa and an elongation at maximum tensile strength (ε m) between 29.80 % < ε m < 52.60 % at temperatures of −40, +20 and +50 °C.


Glycidyl azide polymer (GAP) GAP modified double-base powders Particle size distribution Thermal decomposition Mechanical properties 



Median diameter (μm)


Maximum tensile strength (MPa)


Elongation at maximum tensile strength (%)


Differential thermogravimetry




Glycidyl azide polymer


Cross-linked modified double-base


Copolyether of ethylene oxide and tetrahydrofuran








Carbon black






Centralite II


Scanning electron microscopy


Thermal gravimetric analysis


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingPeople’s Republic of China
  2. 2.School of Materials Science and EngineeringWuhan Institute of TechnologyWuhanPeople’s Republic of China

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