CHEMISTRY: We finally finished the chapter! Did you realize molecules could be that large? And so many of them. But don’t you think polymers are cool? Here’s the lecture for Tuesday.
UPDATE: Test has been changed to THIS Thursday. Help session Thursday morning, 7:30 AM.
Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe? Hmmmmm…
Image source: http://www.packtech.ca/pb/images/img32161428fffbe41e07.jpg
Is a garbage bag thermosetting or a thermoplastic polymer? It is a thermoplastic polymer because it has a linear structure and linear structures are not heat resistant.
Are bullet proof vest thermo plastic? Yes because high quality polyethylene has been used to make a bulletproof vest.
A question I had was could scientists potentially make a recyclable cross linked polymer? Because our most efficient polymer is cross linked but it’s not recyclable.
Q: How come when we added salt to the saturated waterlock, the substance liquified?
A: The saturated waterlock turned into a liquid because, waterlock is a cross-linked polymer, so when the NaCl was added, it separate the cross-linked polymers inside the glob, which cased it to turn into a liquid.