Abstract
Rigid rod-like liquid-crystalline polymers are currently in high demand because of their high modulus and rigidity, and good orientation properties. Gelation is an important phenomenon encountered in lyotropic solutions of polymeric liquid crystals, and this is manifested in fibre spinning and many biological systems. We will focus our attention on the behaviour of gels formed by the synthetic polypeptide, poly(γ-benzyl α, l-glutamate) (PBLG), in benzyl alcohol (BA). More basic than determining the phase boundaries are the questions concerning the definition and identification of the gel phase and the molecular origins of such a phase, along with the added complexity of the dynamics in each phase. In this work, we attempt to make a systematic study of each phase for the PBLG-BA system, using rheological, thermal and light scattering experiments.
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