Narrowing of a blood vessel is known as _______________.

Severe episodes of  chest pain are known as angina pectoris.

Means lacking normal muscle tone or strength.

The combining form ather/o means _______________.

The thick muscular layer of the heart is called the

Hardening and narrowing of the arteries due to a buildup of cholesterol plaques.

An abnormal decrease in the number of one or all kinds of white blood cells.

______________ play an important role in the clotting of blood.

4versionA. Analyzing Polymers -PC8 Below is a DSC thermogram of polyethylene-like polycarbonates with varying amounts of methylene in their polymer sequence (where n=2,4,6,8, or 10) according to the general structure also shown below. Note that no glass transition temperature is indicated on the thermogram for any of the polymers.  A. (.4 pt) What is the Tc for the polymer PC8? B. (.4 pt) What is the Tm for the polymer PC8? C. (.6 pts) Which polymer has the highest percent crystallinity and briefly describe why? D. (.6 pts) Which polymer would be more susceptible to creep and briefly describe why?       The same polymers were also analyzed with XRD and compared to high-density polyethylene (HDPE) E. (0.5 pts) Based on these results, which polymers have crystal structures similar to HDPE and which likely have different crystal structures? F. (0.5 pts) The plane indicated around 2Ɵ=30° has a miller indices of 210. Draw the plane.  G. (1 pts) You’ve determined your % crystallinity for your PC8 sample is 54% and has a density of 120,000 g/cm3.  Calculate the density of the density of completely amorphous PC8 if the density of completely crystalline PC8 is 200,000 g/cm3? Show all work H. (0.5 pts) You decided to run gel filtration chromatography (a form of size-exclusion chromatography) on your PC samples, but you forgot to label your samples. Which of your PC samples do you think corresponds to the darkest gray (furthest to the left) in your GPC plot and why?   

1. Your company standards mandate that the polydispersity index for your new polymer processing procedure yield a polydispersity index of less than or equal to 1.15. Your polymer processing ends with 3 fractions, labeled D, E, & F in the table below with the breakdown of different size chains within your new polymer sample. Does your new fabrication method meet that standard? Show all your work and justify your answer (describe the measurement you are comparing and why).    Fraction MW # of Chains Ni*Mi Ni*Mi^2 D 75 25 1875 140625 E 140 100 14000 1960000 F 250 120 30000 7500000 SUM: 465 245 45875 9600625