Abstract
We studied the dynamics of the liquid–glass transition in the molecular glass-former, trimethylheptane (TMH), using depolarized near backscattering spectroscopy (DNBS). We found that in TMH density fluctuations are more important than orientational fluctuations in the depolarized scattered intensity. We carried out a preliminary analysis of the dynamic susceptibility, χ ″( ω) in the temperature range 180 to 260 K based on the idealized mode coupling theory (MCT). We estimated the exponent parameter, λ≃0.78, and the crossover temperature T c ∼125 K .
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