Abstract
Frontal photopolymerization was applied to fabricate polymer/nanozirconia hybrid material by using acrylates as polymerizable components and tetrabutyl zirconate (TBZ) as the precursor of nanozirconia, respectively. The nanozirconia particles were in-situ generated with the polymerization front traveling and gradiently dispersed in the simultaneously formed polymer rod. The iodonium salt was utilized as photoacid generator to produce protonic acid and drive TBZ into nanozirconia particles. With the frontal polymerization traveling downward, the particle size and concentration of zirconia increased, but layer-resolved conversion of TBZ decreased. The particle size of zirconia could be reduced remarkably by the protection of monoalkyl titanate bearing six long chains. The refractive index of the hybrid rod was found to increase from top to down. The top–down layer-resolved storage modulus of the hybrid rod increased due to nanoparticle filling effect but decreased beyond the depth of 4 cm from the top, which may be ascribed to particle aggregation.
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This project is supported by the National Natural Science Foundation of China (grant no. 20304019, 60378029).
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Cui, Y., Yang, J., Zhan, Y. et al. In situ fabrication of polyacrylate/nanozirconia hybrid material via frontal photopolymerization. Colloid Polym Sci 286, 97–106 (2008). https://doi.org/10.1007/s00396-007-1752-3
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DOI: https://doi.org/10.1007/s00396-007-1752-3