Introduction
I recently did a project on the chemistry of a football helmet. I chose this item because football is one of my passions and I was interested in how football helmets are made. My safety and health relies on these helmets during my participation in the sport. Chemistry is a vital factor in the production of these helmets because miscalculations could lead to severe injury to the head. These helmets are composed of a polycarbonate shell, polyurethane padding, synthetic rubber, and a titanium facemask.
Composition of ...
Main Chemicals, Compounds, Components
Chemistry's Role
[HO(C3H6O)H]+[(C6H5)2C(NCO)2] → C25H42N2O6
CO+Cl2→ COCl2
[HO+2(CH3)+C+OH] + COCl2→ [HO+2(CH3)+C+OH+CO]+Cl2
Background Research
Football helmets are made in different pieces. First, the polycarbonate shell is made through the process of condensation polymerization using bisphenol and carbonyl chloride. This shell is then cooled and molded into the shape of the helmet. This shell is designed provide hard, outer protection, while also providing shock absorption and providing resistance to thermal distortion. Next, the polyurethane padding is made by combining two substances. Substance A ( polyether polyol, a silicone surfactant, and a catalyst) and substance B (diphenylmethane diisocyanate). When these substances cool after mixing, they form a rigid foam that absorbs shock and protects its player. Both substances are made in Rosemont, Illinois, Riddell’s headquarters.
Resources
History of the Football Helmet
Information on the Revolution Speed Helmet
What the Helmet Consists of
http://polyurethane.americanchemistry.com/Introduction-to-Polyurethanes
Information on Polyurethane
General Properties of Polyurethane
http://termine.com/archives/488
Information on Polycarbonate
http://en.wikipedia.org/wiki/Polyurethane
More information on Polyurethane
How Polyurethane is Made
https://www.flinnsci.com/media/620296/91056.pdf
Molecular Formula of Polyurethane
Steps of Making Polyurethane
http://www.britannica.com/EBchecked/topic/86401/butadiene-rubber
Molecular Formula of Synthetic Rubber
http://www.polymerprocessing.com/polymers/PC.html
Molecular Formula of Polycarbonate
http://www.essentialchemicalindustry.org/polymers/polyurethane.html
Process of Making Polyurethane
http://en.wikipedia.org/wiki/Riddell
Location of Riddell
http://www.essentialchemicalindustry.org/polymers/polymers-an-overview.html#condensation
How Polycarbonate is Made
Chemistry’s Role in Making Polycarbonate
http://www.chemistryexplained.com/St-Te/Steel.html
Molecular Formula of Steel Screws and Clips
http://www.britannica.com/EBchecked/topic/463684/plastic
Molecular Formula of Plastic Clips
About the Author
Eli Tostengard is a Junior at Billings Senior High. He is a 3 sport athlete (Football, Basketball, and Track), an Academic All-State performer, a member of Senior Advocates, and an easily relatable guy. Eli is an eager student but doesn’t know what he wants to do in college yet. He also enjoys fishing, hanging out with friends, and living in Montana.