PVA GH-14R

Polyvinyl alcohol (PVA) is an important chemical raw material, used to make polyvinyl acetal, gasoline-resistant pipes and vinylon synthetic fibers, fabric treatment agents, emulsifiers, paper coatings, adhesives, glues, etc.     Different grades Polyvinyl alcohol is obtained by hydrolysis of polyvinyl acetate, but not directly by polymerization of vinyl alcohol. Because vinyl alcohol is extremely unstable, it is impossible to have free vinyl alcohol monomers.   Different degree of polymerization There are generally three kinds of alcoholysis degree, namely 78%, 88%, and 98%. Completely hydrolyzed polyvinyl alcohol is obtained by hydrolyzing polyvinyl acetate with a degree of hydrolysis of 98% to 100%. The degree of hydrolysis of partially hydrolyzed polyvinyl alcohol is generally 87% to 89%. To keep things simple, the numbers for polymerization are usually listed first, followed by the percentage of hydrolysis. So, PVA-1788 (Poval 217) means it has a polymerization degree of 1700 and a hydrolysis degree of 88%.   Different water solubility PVA-1788 is well soluble in water and can be quickly dissolved in cold water or in boiling water. The viscosity of PVA-2488 (Mowiol 47-88) is 1.5-2 times that of 1788 (different manufacturers' grades). The dissolution process of 2488 is longer than that of 1788, and its tensile force after dissolution is greater than that of 1788.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

With the continuous development of science and technology, PVA (polyvinyl alcohol) is an important polymer compound and is widely used in various fields. In the market, PVA has many different models, and there are certain differences and characteristics between them. Next, we will introduce the differences and application scenarios of various PVA models in detail.   Let's discuss one of the common PVA models-PVA-1788. PVA-1788 has a high degree of polymerization and alcoholysis, and its solubility is good. It can be used to prepare high-transparency hydrogel products. Due to its unique physical properties, PVA-1788 is widely used in the medical and health fields, such as making waveforms to simulate human tissue. PVA-1788 can also be used as a film-forming agent for electrolyte and nutrient sustained-release systems, and is used for soil improvement in the agricultural field.     Another common model is PVA-117. Compared with PVA-1788, PVA-117 has a lower degree of polymerization and a slightly higher degree of alcoholysis. This makes PVA-117 easier to dissolve in water, and has good adhesion and fluidity, making it widely used in the preparation of adhesives. Not only that, PVA-117 can also be used as a stabilizer for the preparation of iron oxide nanoparticles, as well as an emulsifier in coatings, etc.     There is also a special type of PVA, namely PVA-217. PVA-217 is characterized by a low gelation temperature, good thermal stability, and is widely used in the fiber field. In the textile industry, PVA-217 can be used for needle spinning to give the yarn a higher tensile force and lower breaking strength. PVA-217 can also be used as a cross-linking agent for cellulose fibers, playing an important role in the textile processing process.   In summary, PVA, as an important polymer compound, has different types of products to choose from in different application fields. PVA-1788 is suitable for medical and health and agricultural fields, while PVA-117 is widely used in adhesives and coatings, and PVA-217 is mainly used in the textile field.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com