Saran, the polymer used to make saran wrap, is an addition polymer formed from two monomers—vinylidene chloride and vinyl chloride. Draw the structure of the polymer. (Hint: The monomers alternate.)

Video transcript

Welcome back everyone in this example. We have a vinyl lighting bromide and a vinyl bromide which are alternating to form an addition polymer. What will be the structure of the polymer. So what we first want to recall is what a polymer is, which is going to be a long chain molecule formed from small molecules linking together and so with an addition polymer. This is going to be formed from linking two different types of monomers together. And because we are given the names of these monomers, first being vinyl siding bromide, where we should recognize that this dean ending tells us that we have two of our bromides. And so this would be our vinyl siding bromide because this structure has two of our bruning atoms within it. This is our first monomer, or we can call this Monitor B. Actually, since it's listed second. And then we are given the name for vinyl bromide, which is just going to be this first monitor that were given. So this is vinyl bromide with just one bromine atom. We'll call this monomer A And so because we are given these two monomers next to each other and we're adding them together to form a polymer and specifically an addition polymer. We're going to recognize these as co polymers, Which is an arrangement of two or more different monomers. So let's get into drawing our structure. We want to recall that to draw our polymer structure. We're going to be removing the pi bonds and creating links between our two different monomers. And so in doing so, we're going to form the following arrangement where we begin with our vinyl lighting bromide. So monomer b we have that bonded to this carbon bonded to two hydrogen atoms in the structure where we're then linking to our carbon, which has the two bonds to bruning. And then because we remove that pi bond, we're linking to our monomer a in purple, where we have a carbon bonded to two hydrogen, creating the link. We have our Carbon bonded to the one bromine and one hydrogen atom. And now we remove that pi bond and create our link again to our vinyl lighting bromide, where we begin with the carbon bonded to two hydrogen. And then we have our carbon bonded to two brahmins. And then we would move forward to our vinyl bromide where we have that carbon bonded to two hydrogen and then finishing off we have carbon bonded to bromine and then hydrogen. Now we want to recognize that we actually will have a continuous link going on between these two monomers. So we're going to make sure we have these bonds sticking out at the end of our chain and we're just going to fill in this dotted line to show that this is just a portion of our polymer structure. It's actually a continuous link as we stated. And so this dotted line with these bonds sticking out, tells us that our polymer is continuous. But we're just focusing on these first four links that we created in our structure from removing those two pi bonds. So our final answer is going to be this entire structure that we've drawn here as our addition polymer, which is a result of combining violin, vinyl siding, bromide and vinyl bromide to form our addition polymer boxed in. I hope everything I reviewed was clear. If you have any questions, please leave them down below notice that we did flip the orientation of our carbon bonds, which is why we began with a tent formation between the links of our two different addition polymers. So I hope everything I reviewed was clear and I will see everyone in the next practice video.