Outreach Program: Plastics are all around us.Support: NSF Polymer Program NSF-1308617 (PI: Chang Ryu)/RPI Polymer Center

• Joshua Harlon Peck

• PTECH, Johnstown, NY

• Polyethylene terephthalate (PET)

• Water bottle. Film real (also used in polyester fabrics such as clothing)

Outreach Program: Plastics are all around us.Support: NSF Polymer Program NSF-1308617 (PI: Chang Ryu)/RPI Polymer Center

• DSC Results for PET

Tg 75 C

Temperature Degree ℃

Glassy

Melting

PET is a semicrystalline polymer.

Outreach Program: Plastics are all around us.

SUMMARY

• Which polymer materials has been used?Ethylene glycol and terephthalic acid

• Chemical Structure of polymer:

(C10H8O4)n

• Polymer Recycling Code for this polymer:

Advantages

• Strong • Clear/Multicolored• Can be heated and

reused• Can join with other

polymers • Flexible• Isn’t chemically

harmful

Disadvantages

• Is not biodegradable • Made from crude oil

PET Pros and Cons

Linked sources (not cited)

http://petresin.org/news_introtoPET.asp

http://indiaplastic.in/wp-content/uploads/2015/02/Roll-of-film-blue.jpg

https://chem.libretexts.org/LibreTexts/Athabasca_University/Chemistry_360%3A_Organic_Chemistry_II/Chapter_21%3A_Carboxylic_Acid_Derivatives%3A_Nucleophilic_Acyl_Substitution_Reactions/21.09_Polyamides_and_Polyesters%3A_Step-

Growth_Polymers

PVC (polyvinyl chloride) Retrieved from: pslc.ws

Chemical structure

How it’s made

through

polyadditon

Analysts We know the tape was

made from a plasticized

sample of PVC

----------------------------------------

(A) Normal PVC

(B) PVC-Polyaniline composite

(C)Sample of PVC with

phthalates (which is

assumed to be dioctyl

phthalate.)

Retrieved from

https://www.researchgate.net/figure/FT-

IR-spectra-of-a-pure-PVC-and-b-PVC-

Polyaniline-composite_fig2_26546894

http://www.pvc.org/en/p/pvcs-physical-

properties

C. OUR Results

(electric tap top)

C=O

Outreach Program: Plastics are all around us.Support: NSF Polymer Program NSF-1308617 (PI: Chang Ryu)/RPI Polymer Center

• FTIR Results

Recorded July 25th,2018 Double Sided Tape Bottom

Dioctyl phthalate added to

PVC

dioctyl phthalate (DOP) has

C=O bonds from ester.

= used as plasticizer for PVC

Advantages

• Cheap to buy • Waterproof • Fire resistant

(chloride makes up 50% of the molecule, when released via heat can slows down fire)

• Light weight

PVC Pros

Retrieved from: pslc.ws

Disadvantages

• A negatively charged Cl halogen can wreak havoc

Explanation

To determine FTIR, the observer passes a infrared light into the sample, which is then reflected into an recorder. FTIR identifies different types of chemical bonds in the sample.

The X axis, wavenumber (cm-1), is determined by this equation 1/2pi(k/m)=x. Where k=spring constant, and m=mass. The higher the spring constant is, the higher the wavenumber. Retrieved from RPI.Ryuc

Explanation no#2 on FTIR

First get T, transmission. One gets T by dividing the IR intensity before by after going through material. This is now serves as a Y axis for a graph. Sometimes A, the absorption is used in place of T on the Y axis, you can get abortion by doing this: “-log(T)” into a calculator. Although scientists also can include a Z coordinate for time it is not provided on the graphs above.

Retrieved from RPI.Ryuc