The use of the drying solution of the polymer solution describes the drying box plays a big role in the experimental process of the polymer solution. If we choose the most suitable drying oven to handle such reagents, then the research and development of industrial chemistry It is a great credit, of course, you can choose a 250 degree configuration when you choose a dry box. Different polymer materials have different conditions for swelling in water, so the preparation method is not exactly the same. Usually, at the beginning of dissolution, a suitable method should be adopted to disperse the particles highly, to prevent agglomeration into agglomerates, and then to add a hydrazine solvent for swelling and dissolution. For the preparation of gelatin, gum arabic, and scutellaria gum solution, it should be pulverized into small pieces and immersed in water for 3 to 4 hours to cause water swelling and expansion. This is a limited swelling process, and then heated and stirred to dissolve to form a solution. This is an infinite swelling process. Methylcellulose completes this preparation process in cold water. The starch swells immediately upon contact with water, but the infinite swelling process must be heated to 60 to 70 ° C in the drying oven to complete the starch slurry. When the polymer solution is prepared, the polymer material is directly dispersed in a solvent. However, since the molar mass of the high molecular substance is relatively large, it first undergoes a swelling process when it is dissolved. Swelling means that water molecules penetrate into the voids between the molecules of the polymer compound, and hydrate with the polar groups in the polymer to expand the volume. As a result, the polymer pores are filled with water molecules. This process is called Limited swelling. The limited swelling process is generally not stirred or heated, so the time is longer. Since there are water molecules between the polymer voids, the force between the polymer molecules is lowered, the swelling process continues, and finally the polymer compound is completely dispersed in water to form a polymer solution, which is called infinite swelling. The infinite swelling process requires agitation or heating, and the drying oven is used to accelerate the formation of the polymer solution. This process of forming a polymer solution is called peptization. The speed of the peptization process depends on the nature of the polymer and the process conditions.
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