The chemistry of play doh

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    The chemistry of play doh The chemistry of play doh Presentation Transcript

    • TheChemistry ofPlay-DohBy Grant “Swagtag” Parker
    • Basics Play-Doh is madefrom a basicsubstance calledstarch. To understand howPlay-Doh works,you must firstunderstandstarches.
    • Starches Two main starches:~amylose~amylopectin If both of thesecompounds areadded, the mixturewill gelatinize.
    • Retrogradation Retrogradation is the process the doughundergoes when it dries out. To keep it moist, you need aretrogradation inhibitor. These are usually waxy starches.
    • surfactants Since the compound is now to sticky,surfactants are added. Must contain hydrophilic and lipophiliccompounds. Surfactants make up 1% of thecompound.
    • storage Play-Doh must bekept in air tightcontainers. If they are not, theretrogradationinhibitors will dry out,causing thecompound to dryout.
    • Implications Play-Doh is FUN! It can teach us aboutstarches, sugars, andother organiccompounds. It’s FUN.
    • Boring Stuff (Citations)Wilson, Tracy V.. "How Play-Doh [[#|Modeling]] [[#|Compound]]Works" 19 July 2000. HowStuffWorks.com.<http://entertainment.howstuffworks.com/play-doh.htm> 12 April2013Kids [[#|Turn]] Central. "Simple Playdoh."http://www.kidsturncentral.com/crafts/crecipe17.htmlUSPTO. "Starch-based [[#|modeling]] [[#|compound]]." Patent6,713,624http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=2&f=G&l=50&co1=AND&d=PTXT&s1=%22starch+based+modeling+compound%22&OS=%22starch+based+modeling+compound%22&RS=%22starch+based+modeling+compound%22