What are the characteristics of a plastic?

Plastics generally have: resistance to corrosion and chemicals, low electrical and thermal conductivity, high strength-to-weight ratio, colors available in a wide variety and transparent, resistance to shock, good durability, low cost, are easy to manufacture, resistant to water and have low toxicity.

Consequently, what are examples of polymers?

Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. Natural polymers occur in nature and can be extracted. They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.

What is a polymer and what is it made of?

A chemical reaction bonding monomers together to make a polymer is called polymerization. Some polymers are natural and made by organisms. Proteins have polypeptide molecules, which are natural polymers made from various amino acid monomer units.

What are polymer products?

Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers.

What are some properties of plastic?

Plastics can also be classified by: their various physical properties, such as: hardness, density, tensile strength, resistance to heat and glass transition temperature, and by their chemical properties, such as the organic chemistry of the polymer and its resistance and reaction to various chemical products and

What are 5 properties of plastic?

Properties of Plastic Materials

  • Strength. The plastics are sufficiently strong and can be used for load bearing structural members.
  • Weather Resistance.
  • Fire Resistance.
  • Durability.
  • Dimensional Stability.
  • Chemical Resistance.
  • Thermal Resistance.
  • Working Conditions.
  • What are the 7 types of plastic?

    Getting to Know Your Plastics: What the 7 Numbers Mean

  • Plastic #1: Polyethylene Terephthalate (PET)
  • Plastic #2: High Density Polyethylene (HDPE)
  • Plastic #3: Polyvinyl Chloride (PVC)
  • Plastic #4: Low Density Polyethylene (LDPE)
  • Plastic #5: Polypropylene (PP)
  • Plastic #6: Polystyrene (PS)
  • Plastic #7: Other.
  • What is a plastic made of?

    These chains are called polymers. This is why many plastics begin with “poly,” such as polyethylene, polystyrene, and polypropylene. Polymers often are made of carbon and hydrogen and sometimes oxygen, nitrogen, sulfur, chlorine, fluorine, phosphorous, or silicon.

    Why does milk turn into plastic when mixed with vinegar?

    Casein occurs when the protein in the milk meets the acid in the vinegar. The casein in milk does not mix with the acid and so it forms blobs. True plastics, called polymers, are a little different. If you want to make a true plastic and learn more about polymers, try the Homemade Slime experiment.

    What are the use of plastic?

    Plastics is versatile, hygenic, lightweight, flexible and highly durable. It accounts for the largest usage of plastics world wide and is used in numerous packaging applications including containers, bottles, drums, trays, boxes, cups and vending packaging, baby products and protection packaging.

    What is the chemical composition of plastic?

    The structure of polypropylene can serve as an example; here attached to every other carbon atom is a pendant methyl group (CH3): The other category of plastics is made up of heterochain polymers. These compounds contain atoms such as oxygen, nitrogen, or sulfur in their backbone chains, in addition to carbon.

    Is plastic flexible?

    Some plastics stretch and are very flexible. Other plastics, such as polyethylene, polystyrene (Styrofoam™) and polyurethane, can be foamed. 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.

    What is the plastic that is used in chairs?

    Plastics with two-dimensional molecular structures are termed thermoplastics and can be heat softened and recycled. Two thermoplastics commonly used in the furniture industry are polypropylene (Robin Day’s polychair) and eco-questionable PVC (polyvinyl chloride), used for panel edging and foils.

    What are the properties of the wood?

    Strength. Physically, wood is strong and stiff but, compared to a material like steel, it’s also light and flexible. It has another interesting property too. Metals, plastics, and ceramics tend to have a fairly uniform inner structure and that makes them isotropic: they behave exactly the same way in all directions.

    How the plastic is made?

    How plastics are made. Plastics are made from natural materials such as cellulose, coal, natural gas, salt and crude oil through a polymerisation or polycondensation process. Crude oil is a complex mixture of thousands of compounds and needs to be processed before it can be used.

    What is plastic made of and where does it come from?

    The main source of synthetic plastics is crude oil. Coal and natural gas are also used to produce plastics. Petrol, paraffin, lubricating oils and high petroleum gases are bi-products, produced during the refining of crude oil.

    Why is tensile testing of plastics important?

    Such tests produce stress-strain diagrams used to determine tensile modulus. The resulting test data can help specify optimal materials, design parts to withstand application forces, and provide key quality control checks for materials. Tensile tests for plastics provide: Tensile Strength (at yield and at break)

    How can plastic be disposed of?

    Disposing of plastic. So most plastics are made from oil and most plastics do not biodegrade. There are no natural processes in place that can absorb non biodegradable plastic back into the biological cycle. It cannot be composted or left to rot where it is dropped or dumped like organic rubbish.

    What is a plastic cup made out of?

    Plastic cups are made with oil, which is not a renewable source. On the other hand, paper cups can be sourced from forests which fall under sustainable management. Plastic cups, especially those made with polystyrene, are also a possible health hazard as chemicals may leach into the beverage.

    What are the properties of rubber?

    The following are the physical properties of rubber:

  • Specific gravity.
  • Abrasion resistance.
  • Tear resistance.
  • Compression set.
  • Resilience.
  • Elongation.
  • Tensile modulus.
  • Tensile strength.
  • Is plastic flammable?

    Many plastics are flammable. They are polymers of hydrocarbons, the same stuff gasoline is made of. Some plastics have chlorine added, and these are harder to burn. When they do burn, the smoke is very nasty.

    What are the properties of ceramic materials?

    If we’re summarizing their properties, we can say that ceramics have:

  • High melting points (so they’re heat resistant).
  • Great hardness and strength.
  • Considerable durability (they’re long-lasting and hard-wearing).
  • Low electrical and thermal conductivity (they’re good insulators).
  • Are plastic malleable?

    A malleable material can be plastic shaped with hammering or rolling without fracture. Typical malleable materials: mild steel, gold, lead.