Molecular Mass Dependence of the Pitch

An increase of the pitch with molecular mass has been observed for LC cellulose acetate in trifluoroacetic acid and for CTC in DEME (cf. also Fig. 2d). The pitch rapidly changes at low molecular masses and remains almost constant above a DP of 150 for the left-handed CTC/DEME system [54]. At very high molecular masses, the LC state was not obtained, gels formed instead. A similar leveling off was observed for the clearing temperature (Fig. 16). For the pitch P as well as for the clearing temperature T, an analytical expression was derived with fitted parameters as a function of the molecular mass [4]. This observa- 

It was demonstrated that the molecular mass of CTC [54], a derivative of cellu- 

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