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Polymerization and dipole moment of poly(allyl cyanide)

1990-9
Küçükyavuz, Zühal
Usanmaz, Ali
Testereci, Şenay
Polymerization of allyl cyanide was carried out by radiation and chemical catalysis. Polymers obtained by γ-rays under various conditions such as in bulk and in the presence of either air or 0.1 mol% ZnCl2 were oily or solid dark-brown products with molecular weights up to 1.4 × 104. The polymers obtained by n-BuLi was a pale-yellow solid, insoluble in common organic solvents and water. No polymer was obtained with BF3O(C2H5)2. The mechanism of polymerization was shown by infra-red investigation to be different for radiation and catalyst polymerization. The relation between intrinsic viscosity and number-average molecular weight was found to be [η] = 4.4 × 10−4M0.51n. The dipole moment ratio D∞ of poly(allyl cyanide) in 1,4-dioxane was measured. The relatively large value of D∞ shows that the polymer chain is not very rigid. A conformational change was observed at 40°C based on dipole moment measurements.