The a function of temperature. DSC and TGA

The various properties of CMC depend upon three
factors: molecular weight of the polymer, average number of carboxyl content
per anhydroglucose unit, and the
distribution of carboxyl substituents along the polymer chains. The precise
control of the structure and the determination of substituent distribution of
CMC are of primary importance for the elucidation of structure-property
relationships (necessary to optimize the performance of the final product) and
for the product quality control. The
thermal analysis is an appropriate tool to study the composition of the
polymer. Thermal analysis and testing of polymers across the polymer supply
chain and lifecycle is a powerful means of measuring physical properties,
transitions, ageing processes, the effect
of additives and the influence of diverse production conditions on these
materials. Thermal analysis, such as DSC and TGA are frequently
used to describe the behavior of a sample as a function of temperature. DSC and
TGA are capable of revealing thermal transitions, degradation processes, and thermal stability studies. Thermogravimetric
analysis plays an important role in determining the thermal stability of the materials. Thermogravimetric
analysis (TGA) has been widely used because they provide a rapid quantitative determination of various
processes under isothermal or non?isothermal
conditions. DSC is a widely-used technique, which is used to examine the
chemical and physical transitions of polymers, during chemical curing, analysis
of chemical decomposition, glass transition, melting and crystallization phase
(physical) and more, all of which being instrumental in gaining invaluable
insight into the materials. Moreover, dielectric
investigations are of special interest in relation to polymers because they
provide detailed information on the molecular configurations. The method used in the study for characterizing
the CMC can represent a valuable tool for the quality control in the industrial
CMC production, as well as for exploring structure-property relationships in Carboxymethylcellulose.  Such
techniques are used to extract the insight that needs
to more fully understand the polymer.