Size of the cooperative rearranging regions vs. fragility in complex glassy systems: Influence of the structure and the molecular interactions
By using Donth's model, the size of the Cooperative Rearranging Regions (CRR) at the
glass transition was determined from TM-DSC measurements on two glassy biopolymers
with different molecular structures (amylose and amylopectin) as well as on starch, which is
the mixture of amylose and amylopectin as it is obtained during its biosynthesis. For these
materials, the Δ C p values at T g and the values of the fragility index (m) were determined
by conventional DSC. The fragility concept was then analyzed by taking into account the …
glass transition was determined from TM-DSC measurements on two glassy biopolymers
with different molecular structures (amylose and amylopectin) as well as on starch, which is
the mixture of amylose and amylopectin as it is obtained during its biosynthesis. For these
materials, the Δ C p values at T g and the values of the fragility index (m) were determined
by conventional DSC. The fragility concept was then analyzed by taking into account the …
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