Abstract
Developing new and highly efficient nucleating agent becomes more and more important for the preparation of polymeric microcellular foams. Here, a “soft” star-sharp nucleating agent with in which poly(ionic liquid)s (PILs) are the arms and polyhedral oligomeric silsesquioxane (POSS) is a core, respectively, was synthesized via atom transfer radical polymerization (ATRP). This nucleating agent was applied in microcellular foaming of polystyrene using supercritical carbon dioxide (scCO2) as blowing agent, which showed that it can be dispersed as particles with size of ~200 nm, can increasing the CO2 solubility in polymer, and in turn can significantly improve the cell morphology of the foams. Our results demonstrate that the combinations of POSS and PILs with novel structure show somehow higher efficiency in manipulating cell morphology, and help to design new and high efficient nucleating agent for polymer microcellular foams.
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Acknowledgements
This study was financially supported by the Zhejiang Province Public Welfare Project (No. 2017C31112), Taizhou Science and Technology Project (No. 15gy53), National Natural Science Foundation of China (No. 51403149).
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He, Z., Zhong, M., Yang, Y. et al. Synthesis of POSS-based star-shaped poly(ionic liquid)s and its application in supercritical CO2 microcellular foaming of polystyrene. J Polym Res 23, 243 (2016). https://doi.org/10.1007/s10965-016-1142-y
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DOI: https://doi.org/10.1007/s10965-016-1142-y