Question

Mention tha genral characteristics of synthetic plastic

Answer 1

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here is your answer :-


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The majority of manufactured polymers are thermoplastic, meaning that once the polymer is formed it can be heated and reformed over and over again. This property allows for easy processing and facilitates recycling. The other group, the thermosets, cannot be remelted. Once these polymers are formed, reheating will cause the material to ultimately degrade, but not melt.

Every polymer has very distinct characteristics, but most polymers have the following general attributes.

Polymers can be very resistant to chemicals. Consider all the cleaning fluids in your home that are packaged in plastic. Reading the warning labels that describe what happens when the chemical comes in contact with skin or eyes or is ingested will emphasize the need for chemical resistance in the plastic packaging. While solvents easily dissolve some plastics, other plastics provide safe, non-breakable packages for aggressive solvents.

Polymers can be both thermal and electrical insulators. A walk through your house will reinforce this concept, as you consider all the appliances, cords, electrical outlets and wiring that are made or covered with polymeric materials. Thermal resistance is evident in the kitchen with pot and pan handles made of polymers, the coffee pot handles, the foam core of refrigerators and freezers, insulated cups, coolers, and microwave cookware. The thermal underwear that many skiers wear is made of polypropylene and the fiberfill in winter jackets is acrylic and polyester.

Generally, polymers are very light in weight with significant degrees of strength. Consider the range of applications, from toys to the frame structure of space stations, or from delicate nylon fiber in pantyhose to Kevlar, which is used in bulletproof vests. Some polymers float in water while others sink.  But, compared to the density of stone, concrete, steel, copper, or aluminum, all plastics are lightweight materials.

Polymers can be processed in various ways. Extrusion produces thin fibers or heavy pipes or films or food bottles. Injection molding can produce very intricate parts or large car body panels. Plastics can be molded into drums or be mixed with solvents to become adhesives or paints. Elastomers and some plastics stretch and are very flexible. Some plastics are stretched in processing to hold their shape, such as soft drink bottles. Other polymers can be foamed like polystyrene (Styrofoam™), polyurethane and polyethylene.

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Answer 2

Characteristic of synthetic plastics are -

1.Light weight -synthetic plastics. materials are very high light in weight as compared to natural plastic materials .

2.High tensile strength - Synthetic plastics can hold a lot of weight without breaking . For example,synthetic plastic can with stand more weight as compared to a thread of cotton or same thickness .

3.Resistance two chemicals - Synthetic plastic sir not easily affected by strong chemicals, such as acids and alkalis .

4.Non-biodegradable - Synthetic plastics are not biodegradable, that is, they do not witherlike natural plastics .

5.Lustrous and colourful -Synthetic plastic materials can be made more Shiny and bright .they can be made in any desired colour or texture,they are, therefore, obtain used for making a large variety of household products .

6.Non-conductors -they are poor conductors of heat and electricity .