On the Melting Point of Cellulose Acetate
To study the melting point of cellulose acetate is a key issue in materials science. Cellulose acetate has unique physical and chemical properties, and there are many factors affecting its melting point.

Investigate its chemical structure, the amount and distribution of acetyl groups, which have a significant effect on the melting point. If the content of acetyl groups is high and the distribution is uniform, the intermolecular force is enhanced, and the melting point will also increase. Because the acetyl group forms hydrogen bonds or van der Waals forces with adjacent molecules, the molecular motion is bound, and higher temperatures are required to disintegrate its lattice.

Preparation process should not be underestimated. Cellulose acetate prepared by different polymerization methods and reaction conditions has different microstructures. If the product obtained by solution polymerization and melt polymerization has different crystallinity and molecular chain arrangement, and then the melting point is different. During solution polymerization, the molecular chains stretch in the solution, and the arrangement regularity is inferior to that of melt polymerization, so the melting point may be different.

External environmental factors, such as pressure and impurities, also have left and right melting points. Under moderate pressure, the molecular spacing decreases, the force increases, and the melting point increases. The addition of impurities will destroy the order of the lattice and reduce the melting point. For example, the presence of trace moisture in cellulose acetate will weaken the intermolecular force and reduce the melting point.

In summary, in order to accurately determine and regulate the melting point of cellulose acetate, it is necessary to comprehensively consider the chemical structure, preparation process and external environmental factors. By optimizing the process and controlling impurities, cellulose acetate materials with expected melting points can be obtained to meet the needs of different fields.