Abstract
AbstractCopolymers of 4‐methyl‐1‐penten‐3‐one and (S)‐4‐methyl‐1‐hexen‐3‐one have been synthesized by radical‐ and anionic initiation and their composition has been determined by 13C NMR and 1H NMR spectroscopy. A comparison between the composition of the initial monomer mixture, F, and the composition of the monomeric units in the copolymers, f, indicates Bernoullian copolymerization statistics with both types of initiators. The intrinsic viscosity, the number‐average molecular weight, and the second virial coefficient of the osmotic pressure were measured and an unusually high increase of the intrinsic viscosity with f was noticed. The results can be interpreted by assuming a strong increase in the unperturbed chain dimensions with increasing content of optically active monomeric units in the copolymer.
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