ESR studies were carried out on the rotational dynamics of cholestane molecular tracer dissolved in liquid crystal homopolymer and copolymer from well above T-NI down to below T-g Rheological measurements also provided the flow relaxation properties of the polymer matrices. The distribution functions of molecular sites were determined, and their stability was monitored as a function of thermal history. The different molecular site distributions and cooperativity degrees were compared and discussed.
Heterogeneity in the dynamics of a molecular tracer dissolved in liquid crystal homopolymer and copolymer
ANDREOZZI, LAURA;GIORDANO, MARCO;GALLI, GIANCARLO
2004-01-01
Abstract
ESR studies were carried out on the rotational dynamics of cholestane molecular tracer dissolved in liquid crystal homopolymer and copolymer from well above T-NI down to below T-g Rheological measurements also provided the flow relaxation properties of the polymer matrices. The distribution functions of molecular sites were determined, and their stability was monitored as a function of thermal history. The different molecular site distributions and cooperativity degrees were compared and discussed.File in questo prodotto:
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