Temperature Effect on Template Polymerization of Methacrylic Acid Using Stereocomplex Formation on Quartz Crystal Microbalance Substrates

摘要

The radical polymerization of methacrylic acid (MAA) at 0, 20, 40, and 70 °C was achieved in porous isotactic (it-) poly (methyl methacrylate) (PMMA) films on quartz crystal microbalance (QCM) substrates, which were prepared by layer-by-layer assembled stereocomplex films of it-PMMA and syndiotactic (st-) poly(methacrylic acid) (PMAA), followed by the subsequent extraction of st-PMAA. The MAA polymerization yields increased from 35 to 75%, as the polymerization temperature increased from 0 to 70 °C. Furthermore, infrared spectroscopy revealed that a higher polymerization temperature is necessary to form it-PMMA/st-PMAA stereocomplexes via stereoregular polymerization manner that resemble native it-PMMA/st-PMAA stereocomplexes. X-ray diffraction pattern of porous it-PMMA were also investigated for reaction fields.