Polymerization+Reactions.pptx - Polymers are large...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Polymers are large molecules made by linking together many smaller molecules, called monomers . Polymerization reactions can either be classified as addition reactions or as condensation reactions. Natural polymers include proteins, carbohydrates and lipids. Synthetic polymers include plastics, nylon, acetate, and polyesters. monomers polymer monomer symbol n
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Addition Polymers Addition polymerization is a reaction where monomer units join each other in a process that involves the rearranging of electrons in double or triple bonds in the monomer. C - - C - - Ethene (ethylene) has two pairs of shared electrons in the double bond. High temperature or UV light can cause two of these shared (paired) electrons to become unshared ( unpaired ).
Image of page 2
Polyethene (Polyethylene or Vinyl)
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Here’s another way to see the chain reaction. These are the carbon atoms with their double- bond (2 shared electrons each). The hydrogen atoms are not shown. A collision breaks the first bond. Once the first double bond is broken, a chain reaction will occur. In about a second an entire chamber of compressed ethylene gas turns into the polymer, polyethylene.
Image of page 4
When the chains get up to 500,000 carbons long, they
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern