PART ONE:

PART ONE: Polyurethane - A Foam Polymer

The chemicals (monomer A and monomer B) used in this experiment are very viscous so we need to minimize the glassware that is needed to transfer the chemicals. To do this you will need to mark two styrofoam cups at volumes of approximately 30 mLs. Follow the procedure using a graduated cylinder and water to determine the level for 30 mLs in a styrofoam cup.

Because both monomer A and monomer B contain chemicals which can cause skin irritation everyone must wear vinyl gloves. Just remember these gloves are very modest protection. Do not spill any of the monomers. If you do immediately wipe clean with a paper towel, and remove the vinyl gloves so as not to get any of the monomer on your skin or clothes.

The monomers are located in the hood so pour the monomers into the styrfoam cups there, so the fumes do not driff into the laboratory. After transferring the monomers to their respective cups you may return to your work area to complete the experiment.

The experimental procedure suggests using food coloring to enhance the appearance of your product. Use only a few drops of a single food coloring or in combination if you want that special color. Too many drops is not good.

Use plenty of paper towels when you cover the laboratory bench. We want to keep from trashing the bench tops!

Pour monomer B into monomer A and stirr the mixture. It will take a moment for anything to happen so mix the two monomers well. Do not just stir once and stop stir until you can see something happening inside the styrofoam cup. KEEP YOUR EYES ON THE MIXTURE NOT YOUR LAB PARTNER! Remove the stirrer, leave it in the mixture, whatever.

Watch what happens, but DO NOT TOUCH. Unreacted toluene 2, 4 - diisocyanate remains on the surface of the product. It needs time to dry. It should be fine by the time you leave laboratory. You are welcome to take the stuff home with you. Note in the image on the left Xiaoming and Kelly opted not to use any food coloring. So that is the 'natural' color of the polymer.

	The chemicals (monomer A and monomer B) used in this experiment are very viscous so we need to minimize the glassware that is needed to transfer the chemicals. To do this you will need to mark two styrofoam cups at volumes of approximately 30 mLs. Follow the procedure using a graduated cylinder and water to determine the level for 30 mLs in a styrofoam cup.
	Because both monomer A and monomer B contain chemicals which can cause skin irritation everyone must wear vinyl gloves. Just remember these gloves are very modest protection. Do not spill any of the monomers. If you do immediately wipe clean with a paper towel, and remove the vinyl gloves so as not to get any of the monomer on your skin or clothes.
	The monomers are located in the hood so pour the monomers into the styrfoam cups there, so the fumes do not driff into the laboratory. After transferring the monomers to their respective cups you may return to your work area to complete the experiment.
	The experimental procedure suggests using food coloring to enhance the appearance of your product. Use only a few drops of a single food coloring or in combination if you want that special color. Too many drops is not good.
	Use plenty of paper towels when you cover the laboratory bench. We want to keep from trashing the bench tops! Pour monomer B into monomer A and stirr the mixture. It will take a moment for anything to happen so mix the two monomers well. Do not just stir once and stop stir until you can see something happening inside the styrofoam cup. KEEP YOUR EYES ON THE MIXTURE NOT YOUR LAB PARTNER! Remove the stirrer, leave it in the mixture, whatever.
	Watch what happens, but DO NOT TOUCH. Unreacted toluene 2, 4 - diisocyanate remains on the surface of the product. It needs time to dry. It should be fine by the time you leave laboratory. You are welcome to take the stuff home with you. Note in the image on the left Xiaoming and Kelly opted not to use any food coloring. So that is the 'natural' color of the polymer.