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Polymers

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Esam Almanasrah

on 21 November 2014

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Transcript of Polymers

Properties of Polymers
Esam Almanasrah
Ellery Jones
Sophia Chen
Chau Tran
IUPAC Definition
A polymer is "a substance composed of molecules characterized by the multiple repetition of one or more species of atoms or groups of atoms (constitutional units) linked to each other in amounts sufficient to provide a set of properties that do not vary markedly with the addition or removal of one or a few of the constitutional units."
Common Polymers
Polymers are very common in nature Some examples include cellulose, rubber, cotton, silk, and proteins.

There is also a wide variety of synthetic polymers that have been produced, mainly from petroleum based raw materials. These include teflon, nylon, polyurethane, and polystyrene.
Addition Polymers
Addition polymerization: polymerization by a repeated addition process

Many plastics are addition polymers made from hydrocarbon sources. The hydrocarbon must be unsaturated in order to polymerize.

Example: Polyvinyl chloride or PVC is widely used for pipes and other structural materials. Vinyl chloride is also known as chloroethene.

Condensation Polymers
Condensation polymerization: polymerization by a repeated condensation process (i.e. with elimination of simple molecules such as water)

The most commonly known condensation polymers are proteins, fabrics such as nylon, silk, or polyester. Polyester is created through ester linkages between monomers, which involve the functional groups carboxyl and hydroxyl (an organic acid and an alcohol monomer). The carboxylic acids and amines link to form peptide bonds, also known as amide groups. Proteins are condensation polymers made from amino acid monomers. Carbohydrates are also condensation polymers made from sugar monomers such as glucose and galactose.


Flubber (PVAc and Borax)
The flubber is made from polyvinyl acetate and borax through a condensation reaction.
Polyvinyl acetate (PVAc)
Bounciness
Streching Slow
Streching Fast
Experiments

Smushing
Hanging
Behavior when heated
Letting it sit
The flubber leveled out and turned back into blob after it sat untouched for several minutes. It became smoother and flatter.
Noise Test
obtain 20.00 g of flubber
drop from 40 cm
count number of visible bounds in 10 seconds
Trial Number of Bounces
1 5
2 6
3 6
4 5
5 5
Slime (PVA and Borax)
The gelation process entails formation of a borate ester that crosslinks the chains of the PVA. Borate esters form readily by condensation of hydroxyl groups and the B-OH groups
Polyvinyl alcohol
Bounciness
Streching
Making it
Experiments

Smushing
Hanging
Behavior when heated
Letting it sit
After letting the slime sit for several minutes, the texture smoothed and it flattened out to a pancake shape. Also, it became more amalgamated.
Noise Test
obtain 20.00 g of flubber
drop from 40 cm
count number of visible bounds in 10 seconds
Trial Number of Bounces
1 4
2 3
3 2
4 4
5 4
Works Cited
"BASIC DEFINITIONS OF TERMS RELATING TO POLYMERS." INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY. N.p., 1974. Web. 25 Sept. 2013. <http://pac.iupac.org/publications/pac/pdf/1974/pdf/4003x0477.pdf>.
"Slime [poly(vinyl Alcohol) with Sodium Borate]." University of Minnesota Chemistry Department. University of Minnesota, 26 Sept. 2006. Web. 25 Sept. 2013. <http://www.chem.umn.edu/outreach/OutreachDemo12.html>.
Tang, Simon, and Lewis McCarthy. "Non Newtonian Fluid." Chemistry Demos. N.p., n.d. Web. 25 Sept. 2013. <http://www.chemistrydemos.co.uk/webpages/non_newtonian_fluid.php>.
Pain Test
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