This Letter reports the first experimental evidence that solutions of linear flexible polymers are characterized by a concentration-dependent universal length which is easily scaled to be independent of molecular weight M(3×10⁵<~M<~2.6×10⁷) and of solvent quality. It is also found that the product of M and the derivative of the osmotic pressure π with respect to concentration c, M(∂π∂c)T, is universal and independent of solvent quality or M.
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Wiltzius et al. (1983) studied this question.
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