With the help of an activity show the properties of two types of plastic
Answers
Explanation:
Plastics are everywhere. You use them every day. Plastics are used in car parts and for all kinds of storage. Most stores also bag your items in plastic bags. Some plastics are soft while others are hard, almost like glass. If you drink water from a bottle, that bottle is most likely plastic. Plastic is relatively inexpensive so it is used in many applications. There are two basic classes of plastics along with seven popular types of plastics.
Two Basic Classes
According to the American Chemistry Council, Inc., there are literally thousands of different plastics. This is because plastics can be made to suit almost any application. Scientists can make plastics that are see-through, plastics that block oxygen, and even plastics that stretch and then return to their original shape. Plastics can also be made to stop bullets!
Even though there's all this variety, plastic manufacturers still group plastics into two basic classes.
Thermoplastics are plastics made to be melted again, placed in a mold to make something, and melted again if needed to make something else. Polyethylene, polypropylene, nylon, and polycarbonate are examples of thermoplastics.
Thermosets are plastics that are made into products right away and cannot be melted to make something else again. Much like a clay pot is baked to set it, thermosets are plastics that are heated to set them. Once set, thermosets cannot be turned into something else like thermoplastics can. Epoxies and silicone are thermosets.
Plastic Number & Uses