Question

Find out the constituents of different kinds of plastic and which of their properties contribute to their specific usage​

Answer 1

Answer:

Paper or other natural materials are biodegradable, which means they naturally break down over the course of a few days, months, or years into substances that can be absorbed into the soil and recycled naturally. Plastic, on the other hand, can take hundreds, if not thousands, of years to biodegrade. This means plastic that gets thrown away will stick around for many generations, taking up precious space in landfills and polluting the environment such as our oceans

Answer 2

Answer:

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The term “plastics” includes materials composed of various elements such as carbon, hydrogen, oxygen, nitrogen, chlorine, and sulfur. Plastics typically have high molecular weight, meaning each molecule can have thousands of atoms bound together. Naturally occurring materials, such as wood, horn and rosin, are also composed of molecules of high molecular weight. The manufactured or synthetic plastics are often designed to mimic the properties of natural materials. Plastics, also called polymers, are produced by the conversion of natural products or by the synthesis from primary chemicals generally coming from oil, natural gas, or coal.

Most plastics are based on the carbon atom. Silicones, which are based on the silicon atom, are an exception. The carbon atom can link to other atoms with up to four chemical bonds. When all of the bonds are to other carbon atoms, diamonds or graphite or carbon black soot may result. For plastics the carbon atoms are also connected to the aforementioned hydrogen, oxygen, nitrogen, chlorine, or sulfur. When the connections of atoms result in long chains, like pearls on a string of pearls, the polymer is called a thermoplastic. Thermoplastics are characterized by being meltable. The thermoplastics all have repeat units, the smallest section of the chain that is identical. We call these repeat units unit cells. The vast majority of plastics, about 92%, are thermoplastics.

Some properties in plastic product applications are:

• Hot-filled packaging used for products such as ketchup.
• Chemical-resistant packaging used for products such as bleach.
• Impact strength of car bumpers.

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