Ring-Opening Copolymerization of Tetrahydrofurfuryl-Acrylate and and Methacrylate
1965 Volume 22 Issue 237 Pages 69-78
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1965 Volume 22 Issue 237 Pages 69-78
Ring-opening copolymerizations of tetrahydrofurfuryl acrylate (TA) and tetrahydrofurfuryl methacrylate (TMA) with epichlorohydrin (ECH) catalyzed by borontrifluoride-etherate (BF3· Et2O) were carried out. Copolymers, almost perfectly soluble in acetone, were obtained in the copolymerizations of all systems. The apparent monomer reactivity ratios were rTA=0.56±0.05 and rECH =0.12±0.01 for the copolymerization of TA and ECH at 0°C, and rTMA=0.72±0.15, rECH=0.14±0.01 for the copolymerization of TMA and ECH at 0°C. For all of the copolymers obtained, the observed values of the double bond content were much smaller than the caluculated ones. The latters were calculated from the polymer compositions by assuming that each of the TA or TMA monomer unit in the copolymers had one double bond. It seems that the cyclic polymerization mechanisms, in which not only the tetrahydrofuran rings, but also the C=C double bonds of TA or TMA take part, are comparatively important in the copolymerizations. Copolymerization of TA and tetrahydrofuran was also examined.
