Citation: FENG Pinzhen. SYNTHESIS AND FREE RADICAL POLYMERIZATION OF 2-OXO-3-METHYLEN E-5-PHENYL-1,4-DIOXAN[J]. Chinese Journal of Polymer Science, ;1993, 11(2): 153-157. shu

SYNTHESIS AND FREE RADICAL POLYMERIZATION OF 2-OXO-3-METHYLEN E-5-PHENYL-1,4-DIOXAN

FENG Pinzhen

Received Date: 30 December 1991

The novel cyclic monomer, 2-oxo-3-methylene-5-phenyl-1,4-dioxan, was synthesized by a set of reactions. Several intermediates were prepared and characterized in order to determine the monomer structure. The presence of chiral centers in the intermediates and resulting monomer makes it complicated to separate , purify and characterize them. It is a very reactive monomer which will polymerize even at room temperature if expose to moisture and air. This monomer can undergo essentially quantitative flee radical ring opening polymerization.The driving force for ring opening is the formation of new carbonyl group and benzylic radical.The monomer and polymer structure were estabished by IR,1H NMR,13C NMR and elemental analysis or high resolution mass spectrum.The molecular weight of the resulting polymer was estimated by viscosity determination.
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