The various properties of CMC depend upon threefactors: molecular weight of the polymer, average number of carboxyl contentper anhydroglucose unit, and thedistribution of carboxyl substituents along the polymer chains. The precisecontrol of the structure and the determination of substituent distribution ofCMC are of primary importance for the elucidation of structure-propertyrelationships (necessary to optimize the performance of the final product) andfor the product quality control. Thethermal analysis is an appropriate tool to study the composition of thepolymer. Thermal analysis and testing of polymers across the polymer supplychain and lifecycle is a powerful means of measuring physical properties,transitions, ageing processes, the effectof additives and the influence of diverse production conditions on thesematerials. Thermal analysis, such as DSC and TGA are frequentlyused to describe the behavior of a sample as a function of temperature. DSC andTGA are capable of revealing thermal transitions, degradation processes, and thermal stability studies. Thermogravimetricanalysis plays an important role in determining the thermal stability of the materials.
Thermogravimetricanalysis (TGA) has been widely used because they provide a rapid quantitative determination of variousprocesses under isothermal or non?isothermalconditions. DSC is a widely-used technique, which is used to examine thechemical and physical transitions of polymers, during chemical curing, analysisof chemical decomposition, glass transition, melting and crystallization phase(physical) and more, all of which being instrumental in gaining invaluableinsight into the materials. Moreover, dielectricinvestigations are of special interest in relation to polymers because theyprovide detailed information on the molecular configurations. The method used in the study for characterizingthe CMC can represent a valuable tool for the quality control in the industrialCMC production, as well as for exploring structure-property relationships in Carboxymethylcellulose. Suchtechniques are used to extract the insight that needsto more fully understand the polymer.