Why are polymers not typically casted into products?
Which of the following is NOT a reason why polymers are used in many food products as discussed in the videos? a. dramatically reduce freezer burns in frozen foods by using polymers with a LCST b. reduce overall manufacturing cost c. Nutrient protection d. Flavor retention e. improve the preservation of the food f. Taste enhancement
Improved technology typically results in lower prices for most products. Why do you think this is true? Describe a market or industry where technological changes have led to cheaper prices. Do you believe technological changes always lead to cheaper prices, why or why not? Provide examples.
Polymers do not show a clear transition between solid and liquid, why is this? Select one: a. Polymers do show a clear transition between solids and liquids O b. The Carbon chains remain tangled when melted O c. The covalent bonds in polymers are not broken when heated O d. The VDW bonds are not all broken at once which gradually weakens the polymer Oe. Polymers are already partly amorphous solids which gradually become amorphous liquids
Why do polymers exhibit greater hysteresis when undergoing a phase transition?
3. Why doped polymers exhibit absorption peaks in much lower energy compared to their pristine or undoped states?
Explain briefly why cellulose and starch have such different properties even though they are both polymers of hexose sugars
The creation of DNA polymers requires energy, why? And how do they acquire the necessary energy? Why doesn’t the next nucleotide bond to the 2’ carbon in RNA? H ow would a change in the side chain of an amino acid affect a protein?
Which of the following is not considered true for polymers? O A. Polymers are transparent. O B. Polymers are recyclable. O C. Polymers are light and also hard to break. OD. Polymers are cheap and long-lasting. O E. Polymers can be easily processed to form various shapes.
Explain why polymers have a higher coefficient of thermal expansion than ceramics in terms of atomic bonding. How does particle gradation (i.e., size distribution) affect the properties of composites?
1. Explain why polymers are stronger when they contain crosslinking. 2. Explain how your polymer degradation observations relate to the properties of your polymer.