Novel poly(aryl ether nitrile ketone) foams and the influence of copolymer structure on the foaming result |
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| Authors: | Jiyong Zhao Zhipeng Wang Honghua Wang Guangyuan Zhou |
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| Affiliation: | 1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, China;2. University of Chinese Academy of Sciences, Beijing, China |
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| Abstract: | Novel poly(aryl ether nitrile ketone) foams were prepared through the batch foaming method with supercritical CO2 as the blowing agent. Both temperature‐induced and pressure‐induced foaming methods were conducted to examine the influence of nitrile groups on the foaming result. The results indicated that nitrile groups influenced the foaming result by affecting both the viscoelasticity and CO2 absorption of the polymers. In addition, the CO2 solubility of the polymers increased with increasing CN content presumably because of the Lewis acid–base nature of the interaction between the CO2 molecules and the nitrile groups. The cell growth process was assessed by analyzing the influence of foaming temperature and foaming time on the cell morphology. Nanocellular foams with a minimum size of 30–50 nm were achieved by the temperature‐induced foaming method. Moreover, highly expanded foams with a maximum expansion ratio of 23.6 were obtained by the pressure‐induced foaming method. © 2018 Society of Chemical Industry |
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| Keywords: | ScCO2 foaming high‐performance foam poly(aryl ether nitrile ketone) nanocellular |
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