Question

1. Polyvinyl chloride, PVC, is a very versatile polymer. For example, it’s used extensively in piping and vinyl siding applications. A highly plasticized form is used for coverings, such as that used to cover notebooks and it’s also used in clothing.

a. Sketch the repeat unit for PVC

b. Draw a plot of modulus versus temperature curves for both samples on the same graph to compare their behavior. Provide a reason for the behavior depicted.

c. Make a similar graph of stress versus strain. Provide a reason for the behavior depicted.

2. Draw a log modulus-temperature plot for a typical amorphous polymer. Indicate the regions exhibited by the polymer (eg., glass, rubbery, viscous, leathery)?

a. To which regions do the following polymers belong at room temperature: chewing gum, a hydrogel used as a styling gel; PVC notebook covers; rubber bands, PlexiglassTM ?

b. Draw another similar graph and sketch comparative curves for the following polymers: i. Amorphous ii. Crystalline iii. Crosslinked iv. High molecular weight v. Low molecular weight

Answer 1

1). ANSWER :

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