Preparation,analysis, and isothermal crystallization behavior of poly[1,3‐bis(aminomethyl)cyclohexamethylene oxamide] |
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| Authors: | Fredrick Nzioka Mutua Tingting Yang Yuanbo Gao Bo Zhu Yong He |
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| Affiliation: | 1. Donghua University Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China;2. School of Mechanical and Process Engineering, Technical University of Kenya, P.O. Box 52428, Nairobi 00200, Kenya;3. School of Material Science and Engineering, Shanghai University, Baoshan, Shanghai 200444, China |
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| Abstract: | Poly[1,3‐bis(aminomethyl)cyclohexaneoxamide] (PBAC2) was synthesized using 1,3‐bis(aminomethyl)cyclohexane (BAC) and dibutyl oxalate (DO) via spray/solid‐state polycondensation (SSP). The structure of the synthesized polyoxamide was confirmed by 1H‐nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy. The weight average molecular weight (Mw) of the polyoxamides prepared was 1.35 × 105. The polyoxamides showed excellent thermal properties with glass transition temperature (Tg) of 150 °C, melting temperature (Tm) of 318 °C, crystallization temperature(Tc) of 253 °C, and initial degradation temperature (Td) of 417 °C suggesting higher thermal stability than commercial polyamide 6 (Td = 378 °C). Kinetic studies of PBAC2 predicted a two‐dimensional crystal growth. X‐ray diffraction powder diffraction suggested that the polymer has high crystallinity. A saturated water absorption of 2.8 wt % was recorded for the new polyoxamide, giving it a competitive edge for applications in civil aviation, reinforced plastics, and electronics industry where precise dimensional stability and high thermal resistance properties are a priority. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46345. |
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| Keywords: | crystallization differential scanning calorimetry polyamides synthesis and processing techniques thermoplastics |
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