The Mark‐Houwink relationship for poly(N‐1,1‐dimethyl‐3‐oxobutylacrylamide), (poly[1‐(1,1‐dimethyl‐3‐oxo‐butylaminocarbonyl)ethylene]), in 2‐butanone at 25°C and the unperturbed chain dimensions have been obtained following standard procedures. The characteristic ratio and the steric factor are quite large, indicating that the lateral substituents are effective in expanding the unperturbed dimensions owing either to their bulkiness or to the possibility of being involved in intramolecular hydrogen bonds.
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Chiantore et al. (1980) studied this question.
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