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Curing Characteristics of PBT and BPS
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Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China

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    Abstract:

    In order to understand the reaction characteristics of azide binder/non-isocyanate bonding system, curing processes of 3,3-bis(azidomethyl)oxetane-tetrahydrofuran copolymer(PBT)/bis-propargyl-succinate(BPS) binding system were investigated by microcalorimetry. The kinetic parameters and characteristic temperatures of PBT/BPS binding system were calculated through Kissinger method and Crane method. The equation between the complete curing time and the curing temperature was also fitted, demonstrating that the apparent activation energy, pre-exponential factor, reaction order and heat for curing reaction of PBT/BPS bonding system are 81.94 kJ·mol-1, 108.48 s-1, 0.93 and -926.88 J·g-1, respectively. The values of gelation temperature, curing temperature and post-curing temperature were examined to 319.29 K, 344.52 K and 366.11 K, respectively. Besides, self-catalyzed phenomenon could be witnessed to exist in the curing reaction process of the PBT/BPS bonding system. The equation between the complete curing time and the curing temperature was y=8.3345×104e-0.02309x-11.116.

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肖立柏,高红旭,任晓宁,等. PBT与BPS固化反应特性[J].含能材料,2021,29(1):48-52.
XIAO Li-bai, GAO Hong-xu, REN Xiao-ning, et al. Curing Characteristics of PBT and BPS[J]. Chinese Journal of Energetic Materials,2021,29(1):48-52.

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History
  • Received:June 30,2020
  • Revised:November 26,2020
  • Adopted:August 20,2020
  • Online: November 18,2020
  • Published: January 25,2021