Exam 31: Synthetic Polymers

Exhibit 31-1 MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -_____ General structure: M=CHR

Exhibit 31-1 MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -____ Isotactic propylene

Which type of polymer is characterized by irregular chain length,low T_g,and only a small degree of cross-linking?

Draw two repeating units of the polymer formed by the reaction of 1,3-butadiene with the following substance.Atoms other than carbon and hydrogen are labeled.

Which of the following is not a property of a crystalline polymer?

Exhibit 31-1 MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -____ a polyurethane

Exhibit 31-1 MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -____ Amorphous polymers that have the ability to stretch out and spring back to their original shape.

Draw the structure of the monomer used to produce the following polymer segment using the ROMP method.

In general,which of the following types of polymers would probably be the least crystalline?

Draw the structure of the product produced by the acyclic diene metathesis (ADMET) of 1,6-heptadiene.

Classify the following polymer.

Which type of polymer has a high glass transition temperature (T_g)?

Exhibit 31-1 MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -______ four-membered metal containing intermediate

Which of the following represents the general structure of a urethane?

Rank the following monomers in order of increasing reactivity toward cationic polymerization (least reactive to most reactive).

Exhibit 31-2 Draw the structure(s) of the monomer(s) used to make each of the following polymers. -Draw:

Exhibit 31-1 MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -____ a Ziegler-Natta catalyst

Exhibit 31-1 MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -____ Polymers obtained when two or more different monomers are allowed to polymerize together.

Which of the following is not an advantage of olefinic metathesis polymerization?

Do you expect nitroethylene to be more or less reactive than ethylene toward cationic polymerization? Explain.