Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

2 Central European Journal of Energetic Materials

2 2024

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Thermal Hazards Studies for the Azidation Process in the Preparation of Tetra Functional Glycidylazide Polymer (t-GAP) Using a Thermal Screening Unit (TSU)

100%

Adak P. K. , Ghosh M. , Meena A. K. , Jain M. , Banerjee S.

Central European Journal of Energetic Materials

2024

tom Vol. 21, no. 3

282--297

Glycidylazide polymer (GAP) tetraol or tetra functional GAP (t-GAP) is a potential energetic binder, capable of exhibiting superior mechanical properties and better curing behaviour for application in high energy propellants. t-GAP is conventionally prepared through azidation of tetra functional poly-epichlorohydrin (t-PECH). Azidation reactions using a metal azide are known to be sensitive to temperature. The present study was aimed at a systematic evaluation of the safe temperature limit for the preparation of t-GAP and to derive optimized reaction conditions using a thermal screening unit (TSU), through both dynamic and isothermal heating experiments. The thermal hazard studies suggested that the azidation reaction is fairly stable at temperatures above 100 °C as it did not exhibit any abrupt rise in reaction temperature or pressure. The process was validated using laboratory scale batches and completion of the reaction was verified using FTIR spectroscopy.

Study of the Progress of Reaction in the Preparation of tetra-Functional GAP using FTIR Spectroscopy

86%

Adak P. K. , Meena A. K. , Ghosh M. , Sutar V. , Jain M. , Banerjee S.

Central European Journal of Energetic Materials

2024

tom Vol. 21, no. 2

138--152

Glycidyl azide polymer (GAP) with tetra hydroxyl functional groups or t-GAP is a potential energetic polymeric binder for application in both high energy propellants and high explosives. t-GAP is synthesized via azidation of the precursor tetrafunctional poly-epichlorohydrine (t-PECH) with sodium azide in DMSO solvent medium. In this article, process optimization and progress of chemical reaction for preparation of t-GAP is studied using FTIR spectroscopy and an attempt is made to predict the reaction kinetics with concentration profiling. The characteristic vibrational features corresponding to C‒N3 of t-GAP and C‒Cl of t-PECH have been used to monitor the progress of reaction.