Journal
PROGRESS IN ORGANIC COATINGS
Volume 65, Issue 4, Pages 450-456Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2009.04.001
Keywords
Layered double hydroxide (LDH); UV curing coating; Nanocomposite
Funding
- National Natural Science Foundation of China [50633010]
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The thermal and mechanical properties of UV curing coatings consisted of urethane acrylates as an oligomer and a diacrylate monomer were reinforced by using layered double hydroxide (LDH). The LDH was organically modified by an ion-exchange process, in which the nitrate anions were replaced by long alkyl sulfate anions. With organic modification, the d-spacing of inorganic LDH layers was greatly enlarged to 2.75 from 0.78 nm, leading the LDH to be organophilic. During in situ photopolymerization process, the d-spacing of LDH layers was further enlarged to 4.29 nm, indicating the intercalation of polymer chains. For comparison, polymer/LDH nanocomposite filled with un-modified LDH was also prepared, and showed less enhancement in thermal and mechanical properties. (C) 2009 Elsevier B.V. All rights reserved.
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