The different physical and chemical properties of
carboxymethyl cellulose (CMC) depend upon three factors: molecular weight of
the polymer, average number of carboxyl content per anhydroglucose unit (AGU) 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 foremost 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 a suitable tool to study the
composition of the polymeric material. Thermal analysis and testing of polymers
across the polymer supply chain and lifecycle is a powerful means of measuring
physical properties, transitions, aging
processes, the effect of additives and the influence of diverse production conditions
on these materials. Thermal analysis, such as DSC and TGA are commonly
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 imperative role in determining the thermal stability of the materials.
Thermogravimetric analysis (TGA) is widely used because they provide a quick quantitative determination of different
processes under isothermal or non?isothermal
conditions. DSC technique, which is used to study 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 very useful 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 suggest 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.