Abstract
A facile catalytic chain transfer polymerization (CCTP) technique has been developed to synthesize covalently linked CdS nanocrystal-polymer hybrids with good optical properties. The in situ polymerization of methyl methacrylate (MMA) on the surface of modified CdS nanocrystals (NCs) with diameter of 5 nm via CCTP process yielded CdS-polymethylmethacrylate (PMMA) hybrid nanocomposites; while the incorporation of hydroxyl-coated CdS NCs into poly(methacryloxypropyltrimethoxysilane) (PMPS)-co-PMMA matrices prepared by CCTP afforded CdS-PMPS-co-PMMA hybrid nanocomposites, which were further cross-linked by free radical polymerization to form CdS NC-polymer network. The spectroscopic studies indicate that as-prepared CdS NC-polymer hybrids show good photoluminescence (PL) and the NC-polymer network exhibits highly enhanced PL property with respect to that before cross-linking. Also described are the probable mechanism for the catalytic chain transfer polymerization on the surface of modified nanocrystal and the measurement of chain transfer constants.
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This work was supported by Natural Science Foundations (NSFs) of China (Grant No. 20576053, 20606016), NSF (NASA) of China (Grant No. 10676013), “863” Important National Science & Technology Specific Project (Grant No. 2007AA06A402), and the NSF of the Jiangsu Higher Education Institutions of China (Grant No. 07KJA53009).
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Wang, CF., Cheng, YP., Wang, JY. et al. Controllable fabrication of nanocrystal-polymer hybrids via the catalytic chain transfer polymerization process. Colloid Polym Sci 287, 829–837 (2009). https://doi.org/10.1007/s00396-009-2037-9
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DOI: https://doi.org/10.1007/s00396-009-2037-9