Abstract
The PLA-PEG block polymer was prepared by opening ring polymerization catalyzed by solid super acid SO42-/ZrO2-CeO2. The acidic property was measured by IR spectra, Hammett Indicator and NH3-TPD techniques. The copolymer was measured by FTIR spectra. The results show the solid super acid SO42-/ZrO2-CeO2 had the strongest acid strength and maximal acid content roasted at 650. Under reaction conditions which were the amount of catalyst 1.0% vs lactide, and polymerization at 170 for 9 h, the intrinsic viscosity reached 1.562 dl. g-1.
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