Crystallography and Polymers Quiz Form
Test your understanding of crystallography and polymers. Please answer all questions to the best of your ability.
Which of the following is a crystalline polymer?
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Polyethylene
Polystyrene
Polycarbonate
Polyvinyl chloride
Select all properties typical of amorphous polymers.
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Lack of long-range order
Sharp melting point
Transparency
High crystallinity
Other
Rate your confidence in identifying polymer crystal structures.
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Not confident
1
2
3
4
Very confident
5
1 is Not confident, 5 is Very confident
Briefly explain what a unit cell is in crystallography.
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Which factors influence the degree of crystallinity in polymers?
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Cooling rate
Molecular weight
Tacticity
Presence of plasticizers
Other
Name one polymer that is typically amorphous.
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Match the following terms to their correct definitions.
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Rows
Definition
Unit cell
Repeating unit in a crystal lattice
Arrangement of chains in ordered regions
Random coil structure
Thermal transition from rigid to flexible
Crystallite
Repeating unit in a crystal lattice
Arrangement of chains in ordered regions
Random coil structure
Thermal transition from rigid to flexible
Amorphous region
Repeating unit in a crystal lattice
Arrangement of chains in ordered regions
Random coil structure
Thermal transition from rigid to flexible
Glass transition
Repeating unit in a crystal lattice
Arrangement of chains in ordered regions
Random coil structure
Thermal transition from rigid to flexible
What is the primary structural difference between thermoplastics and thermosets?
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Which technique is commonly used to study polymer crystallinity?
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X-ray diffraction (XRD)
Infrared spectroscopy (IR)
Ultraviolet-visible spectroscopy (UV-Vis)
Nuclear magnetic resonance (NMR)
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