Potassium diperiodatocuprate-mediated preparation of poly(methyl methacrylate)/organo-montmorillonite composites via in situ grafting copolymerization

作者：Deng K L^*; Liu J; Wang G Z; Tian H; Ren X B; Zhong H B; Zhang P F

来源：Express Polymer Letters, 2008, 2(9): 677-686.

DOI：10.3144/expresspolymlett.2008.80

• polymer composites
• potassium diperiodatocuprate
• montmorillonite

In this study, potassium diperiodatocuprate (Cu(3+)) was selected as an initiator to prepare poly(methyl methacrylate)/organo-montmorillonite composites (OMMT-g-PMMA) by in situ graft copolymerization. Three synthetic parameters were systematically evaluated as a function of the temperature, the concentration of initiator, pH and the ratio of MMA to OMMT. It was found that Cu(3+) was a highly efficient initiator for the preparation of OMMT-g-PMMA i.e., monomer conversion and grafting efficiency were as higher as 95%. The X-ray diffraction measurement showed the intercalation of PMMA chains into OMMT layers on base of an increasing basal spacing after polymerization. FTIR analysis also suggested that the PMMA chains were effectively grafted onto OMMT substrate. The enhanced thermal stabilities of OMMT-g-PMMA composites were confirmed by the thermal gravimetric analysis (TGA). Finally, a single-electron-transfer mechanism was proposed to illustrate the formation of radicals and the preparation process of OMMT-g-PMMA composites. Cu(3+) can be used as an effective and practical initiator in preparing the organic/inorganic composite due to its high grafting efficiency and the milder reaction condition.

• 出版日期2008-9
• 单位河北大学