Staudinger’s rule

As regards the viscosity, Sakurada proposed an empirical formula which aims at enlarging the validity range of Staudinger s rule. According to this formula ... 

The addition of hydrogen chloride to unsaturated elastomers has also received considerable attention. Extensive work has been done on the hydrochlorination ofHevea [poly(ds-l,4-l,4-isoprene)] andBalata [poly(rraMs-l,4-isoprene)] mbbers since 1940 (Staudinger, 1944 Gordon and Tyler, 1953). Both cis-1,4 and trans c/s-l,4-polyisoprenes readily add hydrogen chloride following Markovnikov s rules with only a small amount of cyclization. 

The equation (28) is in conformity with Staudinger s viscosity rule according to which... 

As regards the validity of Staudinger s viscosity rule, opinions are still at variance It is beyond all doubt that a number of cellulose derivatives conform closely... 

This rule was found experimentally by Signer. It is completely analogous to Staudinger s viscosity rule and is subject to the same restrictions (compare the preceding section). The two equations (31) and (28) may be combined to give... 

If there were rigid rods instead of coils — Staudinger s earlier supposition — n should be 2 according to Kuhn and Huggins. The above mentioned results do not therefore confirm this frequently encountered opinion about the rigid rods, it being as a rule improbable on also other grounds. 

The exponent rule is especially significant in combination with the rule that states that the relationships between two variables can always, at least over a limited range of values, be written as an exponential relationship. It has been found empirically that over wide ranges of the molecular weight the following relationships between the molecular weight and the sedimentation coefficient s, the diffusion coefficient D, or the Staudinger index [rj ] are valid ... 

It may well have been quite a clever move to make progress with his own cause [16, p. 191] for Staudinger to assume or use moral concepts followed by the ruling class [16, p. 183]. Anyone who believes that one does not change at all in the process [16, p. 191] is subject to an error of judgement however, like it or not, one s own personality is distorted as a result. 

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