Materials Science Answer Key

Materials Science Answer Key

A Material Science cheat sheet summarizes essential concepts including atomic bonding (ionic, covalent, metallic), crystal structures (FCC, BCC, HCP), and mechanical properties like strength, ductility, and toughness. Key topics include phase diagrams, strengthening mechanisms (dislocations, hardening), and properties of materials (metals, ceramics, polymers, composites).

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MATERIALS SCIENCE ANSWER KEY
1. (1 point each) Match each description with the appropriate category of polymer:
Thermoplastic, thermoset, and elastomer. Each category will be used more than once.
Diagram A: Thermoplastic
Diagram B: Elastomer
Diagram C: Thermoset
Line D: Thermoset
Line E: Thermoplastic
Line F: Elastomer
High impact toughness: Thermoplastic
Extremely high elongation at break: Elastomer
High elastic modulus: Thermoset
Undergoes curing to form irreversible chemical bonds: Thermoset
Physical properties are a result of chain entanglement: Thermoplastic
Randomly, irregularly coiled under normal conditions: Elastomer
Suitable for high-temperature applications: Thermoset
Exhibit viscoelasticity: Elastomer
Cannot be recycled: Thermoset
____/15 pts
2. (20 points total) Organic chemistry nomenclature:
In the space to the right of each diagram, write the letter(s) of the corresponding molecule types.
Note:
Some types may not be used. Some types may be used more than once. Some
molecules will fall into multiple categories - please list all appropriate types.
A. Alkenes
B. Alkynes
C. Alcohols
D. Esters
E. Ethers
F. Aromatics
G. Ketones
H. Amides
I. Amines
J. Carboxylic acids
H
A
C
F
I
TB 4:
C
F
J
D
B
G
E
H
TB 5:
E
I
J
A
B
A
F
Graders: Award 1 point per correct letter. Subtract 1 point per incorrect letter. Do not add /
subtract points for answers not given Lowest score possible for the page is zero.
____/20 pts TB4?____ TB5?____
Tiebreaker 2:
3A. (3) Draw the monomer unit of the following polymer in the box below:
3B. (1) What is the common name of this
monomer?
Styrene
3C. (2) What is the IUPAC systematic
name of this monomer?
Ethenylbenzene or Vinylbenzene
3D. (1) What is the standard abbreviation of the polymer
? PS
3E. (1) What is the recycling code of the polymer
? #6
Any style of drawing is correct, provided the molecule drawn is recognizable as styrene. Two
different possibilities are shown in the box above. Brackets and n are optional. -1 for every error,
e.g. Missing double bond, too many bonds on a carbon, etc. Examples:
____/8 pts TB2?____
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End of Document
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