using huggins equation with two test temperatures viscosity

Experimental Design and Process Optimization CRC Press: New York, USA, 2015. in addition to being used in the development or improvement of products and detection of the effects of variables on processes. When properly executed, this tool allows the management of people and projects and provides specific data for scientific and statistical application, 9 9 Freeman, L. Some statistical techniques and tools have been used in engineering studies for process optimization, such as the planning of experiments (design of experiments, DOE). LTC: Rio de Janeiro, Brazil, 2009.ħ Madanhire, I. Elementos de Engenharia das Reações Químicas, 4th ed. In industrial processes, the results of material characterization are used as reference for adjustments in the reactors, such as distribution of residence time, temperature, pressure and operating flow. The main characterization test of the resin and PET materials is the intrinsic viscosity (IV or ), in which the molar mass of the polymer is indirectly determined. Polyesters to Polypeptide Synthesis, Encyclopedia of Polymer Science and Engineering, 2nd ed. In polymerization and solid state polymerization (SSP) steps for shaping the physicochemical properties of the material, certain process parameters must be continuously monitored to ensure product quality. whose monomer can be synthesized by the direct esterification between terephthalic acid and ethylene glycol or transesterification between dimethyl terephthalate and ethylene glycol. Polyethylene terephthalate (PET) was developed by the researchers Whinfield and Dickson in 1941, 1 1 Whinfield, J. Polymers are macromolecules obtained from the repetition of monomers in the process of polymerization. With the results and the model developed, an industrial solid state polymerization process of PET was evaluated with simulations of the production of 30 tons of PET, demonstrating the importance of controlling the variables to guarantee the performance in quality control laboratories.ĭesign of experiments polyethylene terephthalate viscosity With the analysis of the standard sample of PET with intrinsic viscosity of 0.630 ± 0.008 dL g -1 and 2-chlorophenol solvent, it was observed that the solution flow temperature and PET concentration caused significant effects on the results, while the storage temperature of the solvent was not statistically significant. For this, the response surface methodology was based on a central composite rotatable design (CCRD) to optimize the combinations of the analytical conditions. This work describes the use of experiment planning to investigate the effects of the variables temperature and concentration of the polymer solution on the viscosity test of polyethylene terephthalate (PET).

Using huggins equation with two test temperatures viscosity