1,2,3‐triazole crosslinked polymers as binders for solid rocket propellants |
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| Authors: | Dong‐Hoon Lee Kyoung Tae Kim Yujin Jang Sookyeong Lee Heung Bae Jeon Hyun‐jong Paik Byoung Sun Min Wonho Kim |
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| Affiliation: | 1. Department of Chemical Engineering, Pusan National University, Gumjung‐Gu, Busan, Republic of Korea;2. Department of Chemistry, Kwangwoon University, Wolgye‐Dong, Nowon‐Gu, Seoul, Republic of Korea;3. Department of Polymer Science and Engineering, Pusan National University, Gumjung‐Gu, Busan, Republic of Korea;4. Advanced Propulsion Technology Center, Agency for Defense Development, Yuseong, Daejeon, Republic of Korea |
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| Abstract: | In this study, 1,2,3‐triazole crosslinked polymers were synthesized as a new binder for solid rocket propellant systems by reacting the azide groups of the polymer with the ethynyl groups of a dipolarophile curing agent. All the mixtures were cured in an oven at 52°C for 7 days, and the curing reactivity of the products was analyzed using a Fourier transform‐infrared spectrometer. The carbonyl group adjacent to the triple bond, which acts as an electron‐withdrawing group, considerably accelerated the 1,3‐dipolar cycloaddition reaction between the azide and ethynyl functional groups, affording rubbery materials. The modulus of the polymers increased whereas the elongation at the break decreased with increasing ratio of the crosslinker to the prepolymer, resulting in highly crosslinked polymers. The molecular weights between the crosslinking points and interaction parameters of the 1,2,3‐triazole crosslinked polymers were determined from the swelling data, Flory–Rehner equation, and Mooney–Rivlin equation. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40594. |
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| Keywords: | crosslinking elastomers mechanical properties swelling |
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