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2  Chen GH*, Yao KD, Zhao JT. Montmorillonite Clay/Poly-（methyl-Methacrylate）Hybrid Resin and Its Barrier Properties to The Plasticizer within Poly-vinyl Chloride Composite. Journal of Applied Polymer Science, 73(3):425-430 (1999) 

1  Chen GH*, Chen XQ, Lin ZY, Ye W, Yao KD  Preparation and Properties of PMMA/Clay Nanocomposite, Journal of Materials Science Letters, 18(21): 1761-1763 (1999)