The different physical and chemical properties ofcarboxymethyl cellulose (CMC) depend upon three factors: molecular weight ofthe polymer, average number of carboxyl content per anhydroglucose unit (AGU) and the distribution of carboxylsubstituents along the polymer chains.
The precise control of the structure andthe determination of substituent distribution of CMC are of foremost importancefor the elucidation of structure-property relationships (necessary to optimizethe performance of the final product) and for the product quality control. The thermal analysis is a suitable technique to studythe composition of the polymeric material. Thermal analysis and testing ofpolymers across the polymer supply chain and lifecycle is a prevailing means ofmeasuring physical properties, transitions, agingprocesses, the effect of additives and the effects of diverse production conditionson these materials. Thermal analysis, such as differential scanningcalorimetry (DSC) and thermogravimetric analysis (TGA) are the commonly used todescribe the activities of a sample as a function of temperature.
DSC and TGAare capable of revealing thermal transitions, degradation processes, and thermal stability studies. Thermogravimetricanalysis 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 differentprocesses under isothermal or non?isothermalconditions. DSC technique, which is used to study the chemical and physicaltransitions of polymers, during chemical curing, analysis of chemicaldecomposition, glass transition, melting and crystallization phase and more,all of which being instrumental in gaining very useful insight into thematerials. Moreover, dielectric investigations are of specialinterest in relation to polymers because they provide detailed information onthe molecular configurations.
The methodused in the study for characterizing the CMC can suggest a valuable tool forthe quality control in the industrial CMC production, as well as for exploringstructure-property relationships in Carboxymethylcellulose. Such techniques are used to extract the insight that needs to more fully understand the polymer.