Study on the Thermal Stability and Decomposition Kinetics of Polypropylene Glycol – Glycidyl Azide Polymer – Polypropylene Glycol (PPG-GAP-PPG) as a Novel Triblock Copolymer Binder

• Autorzy: Ghoroghchian Fahimeh , Bayat Yadollah , Abrishami Fatemeh

Identyfikatory

DOI

10.22211/cejem/124073

• Języki publikacji: EN

Abstrakty

EN

In this study, the novel energetic triblock copolymer of polypropylene glycol- glycidyl azide polymer- polypropylene glycol (PPG-GAP-PPG) (M_n= 1419 g·mol^–1) was synthesized by cationic ring-opening polymerization of propylene oxide using low molecular weight glycidyl azide polymer (GAP) (MM_nn = 1006 g·mol–1) as the initiator and boron trifluoride etherate (BFM₃·OEtM₂) as the catalyst. The synthesized GAP and triblock copolymer were characterized by Fourier-transform infrared (FT-IR) spectroscopy, gel permeation chromatography (GPC), and nuclear magnetic resonance spectroscopy (¹H and ¹³C NMR). The thermal stability of the triblock copolymer PPG-GAP-PPG was studied by differential scanning calorimetry (DSC) and thermogravimetry (TG). The DSC results showed that the glass transition temperature (TM_g) of the triblock copolymer (TM_g = −63 °C) was lower than that of neat low molecular weight GAP (T_g = −53 °C). Furthermore, the results indicated that this triblock copolymer is more stable than GAP. The influence of heating rate (10, 20, 30 and 40 °C·min−1) illustrated that increasing the heating rate results in an increase in the triblock copolymer’s decomposition temperature. Non-isothermal methods, proposed by ASTM E698, Flynn-Wall-Ozawa (FWO) and Kissinger, were used to calculate the kinetic parameters, such as activation energy and frequenc factor, for the thermal decomposition of the triblock copolymer PPG-GAP-PPG, using the DSC-DTG were 124.610 and 126.13 kJ·mol^–1, respectively.

Słowa kluczowe

EN

glycidyl azide polymer; polypropylene glycol; triblock copolymer; thermal stability; non-isothermal kinetics

• Wydawca: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2020
• Tom: Vol. 17, no. 2
• Strony: 262--279
• Opis fizyczny: Bibliogr. 39 poz., rys., tab.

Twórcy

autor

Ghoroghchian Fahimeh

• Department of Chemistry and Chemical Engineering, Malek Asthar Univeristy of Technology, P.O. Box 16765-3454, Tehran, Iran

autor

Bayat Yadollah

• Department of Chemistry and Chemical Engineering, Malek Asthar Univeristy of Technology, P.O. Box 16765-3454, Tehran, Iran

autor

Abrishami Fatemeh

• Department of Chemistry and Chemical Engineering, Malek Asthar Univeristy of Technology, P.O. Box 16765-3454, Tehran, Iran

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).