Importance Of Evaporation

I am doing my science fair project on the ability of three different plastic wraps to prevent evaporation. I am motivated to do this project for various reasons: my family keeps a lot has a lot of leftovers and we hunt and have a deep freezer full of game meat and I want to know which plastic wrap would be best for preserving the hydration and freshness of foods. I also want to do this experiment because we keep a lot of plastic wrap in our house without knowing which one is better for preserving foods. In order to do this project, I need to have a better understanding of plastic, PET plastics, PVC plastics, and PVDC plastics. Also, I needed to research the importance of evaporation. Evaporation is the process by which a solid or a liquid

But plastic is an extraordinary innovation that replaces many other expensive products with lightweight, strong easy to maintain , longer lasting material with a less expensive plastic. “Plastics are manufactured materials that can be shaped into almost any form.” Most plastics are made when two or more chemical compounds combine and cause chemical reactions to polymerize, or form a long chain of molecules to form. This causes the plastic to form. The plastic is then heated into a molten liquid and then molded into the shape needed. There are two basic types of plastics. They are thermosetting plastics and thermoplastics. The type of plastic it is determined by the way they react when heated. Thermoplastics are plastics that can be heated and melted and still reform its shape. Thermosetting plastics are just the opposite. They can be melted and cannot be reshaped into its original

It is a well known thermoplastic that is one of the most common plastics in the world. PVC is considered one of the strongest and durable plastics in the world. It is used for packaging, construction, pipes, flooring, electrical insulation, and food and beverage packaging. It resists evaporation and moisture. PVC consists of 43% carbon and 57% chlorine. PVC is also fire retardant because of is chlorine composition. It is considered a safer plastic because it made from natural resources. It does not break easily because of its superior flexibility, and it is easier to sterilize than many other plastics. It is also a recyclable plastic; it can be broken down back into its original molecular composition and reused to make other PVC products. Chorine and ethylene are combined to create a chemical compound called vinyl chloride. After the vinyl chloride has been produced, the polymerization process starts when the vinyl chloride is blended into a white powder with several other ingredients that help in the polymerization process. The powder is then heated into a molten plastic and molded into almost shape needed. Finally, the molten PVC is cooled to form the final