Abstract
N-Methyl methacrylamide (N-MMAm) was polymerized using radical initiators under various conditions. The triad tacticity of the obtained polymers was determined by 100MHz 13C NMR. The polymers were rich in syndiotactic configuration. At a given temperature, the syndiotacticity increased with an increase in solvent polarity. This solvent effect may have connection with the hydrogen bonding interaction among solvent, monomer, and growing species. The fraction of rr triad increased with decreasing polymerization temperature in all solvents. Monomer concentration also affected the stereochemistry of the polymerization. By optimizing conditions, a high rr specificity (rr=95%) was achieved. Thermal property of the poly(N-MMAm)s with different tacticities was studied by DSC.
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