Synthesis and Characterization of a Chiral Monomer and its Polymer,Poly[D-(+)-alpha-Methyl Benzyl Methacryloylamine]

摘要

A chiral monomer,D-(+)-a-methyl benzyl methacryloylamine was synthesized by the condensation reaction of D-(+)-alpha-methyl benzyl amine and methacryloyl chloride.The melting point of the monomer is 95.5°C.The synthesized monomer was polymerized by radical polymerization using 2,2'-azo bis isobutyronitrile(AIBN)as an initiator under nitrogen atmosphere.The chiral monomer and its polymer were characterized by FTIR,NMR and UV-VIS spectroscopy.The number and weight average molecular weights of the polymer are 2.05X10~3 and 2.78X10~3 respectively as measured by GPC.The optical rotation([alpha]_D~(30)C=0.5,CHCl3)of the chiral monomer is+23° and that of the corresponding chiral polymer is+59°.Bisignate cotton effect is observed in the circular dichroism(CD)spectra of the chiral monomer and its polymer.The T_g and T_m of the chiral polymer is 100.6°C and 255°C respectively.