POLYMERS

» Poly = ___________________ » mer = ___________________ » Polymer = ______________________________ » Mono = __________________ » Monomer = __________________ many unit many units one one unit

» Polymers are ______________ ___________ of ____________________________________ ˃Here’s an example… ˃Think of paper clip, a paper clip could be used to represent one unit or one _______________________ ˃A polymer of paper clips would be a _____________ _____________ of paper clips. repeatingchains monomers or single molecules monomer long chain

» To make the chain, many links or “-mers” (monomers) are __________________ hooked together in a process called:____________________________ Polymerization is defined as the ______________ reaction that joins many _________________ to make a _____________________ Polymerization chemical Monomers Polymer chemically

» A ______________________ is a substance that helps the chemical reaction occur fast enough _______________ undergoing any permanent chemical change itself. » (kind of like a taxi cab!) Catalyst without

» Polymers are ________ because we ______ see them with our unaided eyes but in the world of _____, they are very ________. small cannot atomslarge

» ___________________ » _______________________ contain- Sodium Polyacrylate » Clothes » _____________ glue contain _______________ acetate resin » Shoes » Tortoise shells » ______________ » Proteins, __________________, lipids (fat molecules), DNA » Erasers » __________________ PLASTIC Disposable diapers Elmer’s polyvinyl wood carbohydrates cornstarch

» ________________ » CDs » ________ _____________ » Plastic bags » ________ soda bottles » Paper napkins » Disposable plates (plastic, styrofoam or paper) » Pieces of wood Paper eggcartons plastic

» Things that are _______ polymers: ˃___________________ ˃Water ˃___________________ ˃Sugar, salts ˃Any of the __________________ ˃Cup of ______________ is a bunch of water ________________ NOT chemically bonded (like a cup of individual paper clips) NOT Metals Glass Elements water molecules

» Polymers are important in part because they can act in so many __________________ ways. » Scientists can make polymers that have different ___________________. » Some hold ___________ - _________ » Some hold ___________ - like soda bottles, cups, disposable __________! different properties music CDs liquids diapers

» ____________________ within the polymer help to change the properties of that polymer POLYMER CROSS-LINK Cross- links

» _____-_____________ Fluids- do NOT follow the rules that Sir Newton discovered that most liquids follow ˃Non-Newtonian fluids act like both a ____________ and a ___________! ˃Non-Newtonian fluids react to _____________ with INCREASED VISCOSITY ˃Examples: +_______________ NonNewtonian solid liquid STRESS Quicksand Cornstarch

» ____________- how slow a liquid __________. » The SLOWER a liquid flows the ____________ its VISCOSITY. » Viscosity results from the strength of attraction ___________ the particles of the liquid… ˃“slow as molasses” Examples: Honey- has a _________ viscosity Water- has a _________ viscosity Oils- have a _________ viscosity Viscosityflows HIGHER between HIGH LOW HIGH