What is Modified Polyvinyl Alcohol PVOH (PVC Grade)

Modified polyvinyl alcohol (PVA) is an extremely plastic polymer compound obtained by modifying ordinary polyvinyl alcohol. This modification process mainly takes advantage of the chemical reactivity of the double bonds, ester groups, and hydroxyl groups in polyvinyl alcohol after alcoholysis to change the side-chain groups or structure, introduce other monomers to form copolymers or introduce other functional groups to change the chemical structure of the polyvinyl alcohol macromolecule. Modified polyvinyl alcohol combines the basic properties of polyvinyl alcohol with the advantages of other additives or treatments to provide excellent physicochemical properties, such as high molecular weight, thermal stability, water resistance, and high tensile strength. Modified polyvinyl alcohol (PVOH) grades with varying degrees of polymerization, hydrolysis, and comonomers.PVC grades usually refer to materials that approach or meet the standards of polyvinyl chloride (PVC) in terms of physical, chemical, and mechanical properties, although their chemical structures may differ.

 

What is Modified Polyvinyl Alcohol PVOH (PVC Grade) used for?

Environmental protection: Modified polyvinyl alcohol can be used as biodegradable plastic products, with no pollution to the environment; it is an ideal substitute for traditional plastic products, which helps to reduce the pollution of plastic waste to the environment fundamentally. Medical: Modified polyvinyl alcohol can be used as biomedical materials in cardiovascular interventional devices, bone repair materials, oral repair materials and so on. Its good biocompatibility and biodegradability can effectively reduce the body's rejection of the material and damage and improve patient comfort.
Food field: Modified polyvinyl alcohol has excellent heat and moisture resistance in food packaging, effectively extending the freshness period of food. In addition, it can be used as a food additive, helping to improve the quality of food. Textile: Blending modified polyvinyl alcohol with yarn can increase the wrinkle resistance anti-static, and anti-bacterial properties of the yarn, thus improving the comfort and durability of textiles.
Coatings: Modified polyvinyl alcohol can be used as a film-forming agent for coatings to improve adhesion and water resistance while reducing the release of volatile organic compounds, making coatings more environmentally friendly.
In addition, modified polyvinyl alcohol can be used in many industries, such as chemicals, printing, paper making, tanning, agriculture, medicine, packaging, ceramics, electronics, make-up, construction, and so on. It also has important applications in the preparation of water-soluble adhesives, modifiers for starch adhesives, photographic adhesives, and sealants resistant to benzene solvents.

 

How is Modified Polyvinyl Alcohol PVOH (PVC Grade) produced?

The production process of modified polyvinyl alcohols usually involves several steps, including polymerisation reactions, purification and processing, and modification treatments. During the modification stage, the physical and chemical properties can be altered by introducing specific functional groups or reacting with other compounds.

 

How is Modified Polyvinyl Alcohol PVOH (PVC Grade) packaged and stored?

Packaging: Sealed packaging using moisture, dust and UV resistant packaging materials
Storage: It should be stored in a dry, cool and well-ventilated place, avoiding direct sunlight and high temperature.

 

What are the safety precautions for the use of Modified Polyvinyl Alcohol PVOH (PVC Grade)?

Modified polyvinyl alcohols are not inherently toxic, but in some cases, after certain treatments or reactions, modified polyvinyl alcohols can be converted into toxic substances with potential health effects.
Furthermore, in the natural environment, particularly in water, modified polyvinyl alcohols have a tendency to disintegrate into minuscule particles, forming what is known as "microplastics." These microplastics can infiltrate the human body through the food chain, presenting a significant health hazard. Certain types of modified polyvinyl alcohols can also directly harm cell membranes, leading to cell death or reproductive health complications.
Therefore, although modified polyvinyl alcohols are not inherently toxic, their potential health and environmental risks cannot be ignored. When using and handling them, appropriate safety practices should be strictly followed, and their potential impact on the environment and humans should be minimized.