(855) 4-ESSAYS

Type a new keyword(s) and press Enter to search

Plastic Chemistry

These fractions are very complex mixtures. No chemical changes have yet taken place. The fractions need to be chemically altered to make them into more useful products with different melting and boiling points and different chemical properties. .
             Cracking and reforming are the processes used to alter the fractions. Cracking breaks large molecules into smaller ones that are more useful. Reforming changes the internal structure of molecules to produce different compounds. By altering conditions such as temperature and pressure or the use of catalysts, the cracking and reforming techniques can be controlled to produce exactly the blend of compounds needed at a particular time.
             Naphtha is cracked by mixing it with steam and heating it to eight hundred degrees centigrade. It is cooled rapidly to four hundred degrees centigrade, causing chemical changes. The mixture of C6 to C10 compounds is converted to a small number of C2, C3 and C4 compounds which contain carbon-carbon double bonds, C=C (Brown 111).
             The simple compounds are often known as basic chemicals'. All of the basic chemicals are small molecules containing between two and seven carbon atoms. It is these molecules that are the monomers from which the polymers are then made.
             The small monomer molecules are reacted together to form a polymer. In order to make the monomers react and join together, small amounts of catalysts are added to the polymerization reactor.
             Eight of the most important polymers are produced from only three basic chemicals which come from naphtha (Harper).
             Ethylene C2H4.
            
             polymerization to form high density polyethylene (HDPE), low density polyethylene (LDPE) or linear low density polyethylene (LLDPE).
            
             reaction with chlorine to form chloroethene * polymerization to form polyvinyl chloride (PVC).
            
             reaction with benzene to form styrene * polymerization to form polystyrene (PS).
            
             reaction with oxygen to form ethane oxide * further reaction and polymerization to form polyethylene-terephthalate (PET).


Essays Related to Plastic Chemistry

1. Plastic 2

Our homes, schools, and businesses are filled with plastic products. ... And what about telecommunications, dependent on plastic telephones, circuit boards and cable insulation. ... To understand how plastics are made, it is helpful to know something about the chemistry of polymers. ... Making plastic products involves seven main processes to shape plastics into products. ... Deciding how to dispose of plastic wastes has become a major environmental concern, for consumers of plastic product as well as those who produce it. ...

  • Word Count: 629
  • Approx Pages: 3

2. Chemistry

Harmed Adul-Wandi Chemistry 275a Dr Lippincott Harvard University Isotopes and Atomic Mass Objective: 1. ... Materials: A sample of vegium on a plastic cup small-scale balance Procedures: 1. ...

  • Word Count: 554
  • Approx Pages: 2
  • Grade Level: High School

3. Chemistry

Chemistry in society focuses on the problems that humans perform against the ecosystem. ... There are some rivers that run through the state of Maryland that could be taken advantage of with this sort of system and wind mills can be built in order to provide power to numerous houses; 8) recycle aluminum, plastic, paper, glass and cardboard products. ... Chemistry in society focuses on the problems that humans perform against the ecosystem. ...

  • Word Count: 1369
  • Approx Pages: 5
  • Grade Level: Undergraduate

4. Life of a surgeon

During the undergraduate years, school subjects that include some aspect of Biology, Organic and Inorganic Chemistry, English and Mathematics may serve as a useful background in order to acquire a bachelor's degree in this field. ... Along with these main duties, a General Surgeon also act as assistants when thoracic, plastic, brain and orthopedic surgeries are being performed by medical personnel specializing in these fields. ... Other types of surgeons include Neurosurgeons, Orthopedic Surgeons and the Plastic Surgeons. ...

  • Word Count: 997
  • Approx Pages: 4
  • Grade Level: Undergraduate

5. Abiocor Artificial Heart

Angioflex is a proprietary polyurethane plastic that could be used in every surface that interacts with blood (Abiocor). ... Polyurethane plastic is what is known as a polymer. ... Also because it is a plastic, it is very durable and able to withstand the immense amount of throbbing it would receive. ... A blend of organic chemistry, biology, and engineering helped to produce such a historic innovation that will forever change the face of cardiac medicine. ...

  • Word Count: 572
  • Approx Pages: 2
  • Has Bibliography
  • Grade Level: Undergraduate

6. Preparation of Chromium(II) Acetate Hydrate, Cr2

The quadruple M-M interaction is shown to actually be a strong interaction, which has strong implications implying that M-M bonds may be important in the chemistry of metals of the first transition series as well as for the heavier metals3. ... In the second hole is plastic tubing that runs from the bottom of the Buchner flask to a Erlenmeyer flask. ... A solution of 18g sodium acetate in 16mL water in a Erlenmeyer flask is placed on the other end of the plastic tube. ... Wilkinson, Advanced Inorganic Chemistry, 5th edition. 5. ...

  • Word Count: 813
  • Approx Pages: 3
  • Grade Level: High School

7. Phthalates and Cosmetics

The American Chemistry Council denied the use of chemicals in cosmetics could hurt people. ... The European Union, worried about the possible danger phthalates may present in plastic, banned their use in some baby toys designed to be put into the mouth. ...

  • Word Count: 290
  • Approx Pages: 1
  • Grade Level: Undergraduate

8. Legalizing Hemp

This innovative plan could change the course of the future, saving many future doomed products that destroy our environment like plastic. ... However, one thing that was least mentioned was how hemp can generate plastic, which is biodegradable and is as efficient as regular plastic. ... Industries unlike Redwood Lumber, Inc., like Dupont say that its, "Better to live by Chemistry", however people don't realize that living by chemistry shortens the life of our planet because the only thing they care about is profits. ...

  • Word Count: 1421
  • Approx Pages: 6
  • Has Bibliography
  • Grade Level: High School

9. Lasers

Manufacturing a) Large Equipment b) Computer Chips c) Plastic and Cardboard IV. ... Medicine a) Eye Surgery b) Plastic Surgery c) General Surgery d) Dental VIII. ... Science Research Lasers have transformed chemistry research. ... Doctors who perform plastic surgery find the laser very helpful in many different areas. ... When doing plastic surgery the doctors will use laser to cut into or underneath the skin. ...

  • Word Count: 1416
  • Approx Pages: 6
  • Grade Level: High School

Got a writing question? Ask our professional writer!
Submit My Question