Grafting from inorganic surfaces techniques

The polymerization of e-CL was conducted in bulk at 100 °C by using dibutyltin dimethoxide as catalyst and in the presence of 25 to 50 wt% of (organo)clay. In order to collect PCL composites with high inorganic content, polymerizations were terminated at rather low monomer conversion. In agreement with observations made for PCL layered silicate nanocomposites prepared by the same technique and containing a small amount of clay (1-10 wt%), intercalated nanocomposites are recovered when the nanofiller is Cloisite Na or Cloisite 25A. In contrast, partially exfoliated/partially intercalated structures are formed in the presence of Cloisite 30B this situation results from the grafting of PCL chains on the clay surface as already discussed. Then, the desired PCL-based... 

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