Polymer Biochemistry

A chain of repeating units (called monomers)

• monomer

• dimer

• replicate

• polymer

Sodium alginate is

• synthesized in the lab by heating salt in the presence of hydrophobic molecules.

• a natural polymer obtained from kelp and seaweed

• used as a synthetic replacement for salt.

• not a polymer.

A polymer made in the laboratory (or industry) usually made from petrochemicals

• nature polymer

• natural polymer

• protein

• synthetic polymer

Once formed, it can be heated and reformed over and over again

• thermoset

• thermoplastic

• elastomer

• kevlar

Which of the following is a type of natural polymer?

• Sodium Alginate

• poly vinyl acetate

• polystyrene

• polytetrafluoroethylene

Which of the following determine the properties of a polymer?

• chemical nature of the monomer

• length of the polymer chain

• how the monomers are joined together

• All of the above

The birefringence effect that occurs when a polymer is viewed between two polarizing filters represents the _________________ regions of the polymer.

• Crystalline

• Amorphous

• Cross-Linked

• Branched

A thermoplastic polymer will be ______________________.

below its glass transition temperature.

• soft and flexible

• rigid and brittle

• translucent

• rubbery

Which of these is the best example of how the polymer molecules are arranged in Teflon tape?

• 
• 
• 
• none of the above

Tags

NGSS.HS-PS1-3

One explanation for Teflon's low coefficient of friction, hydrophobic and biologically inert properties is.

• The electronegativity of Fluorine

• The thin, smooth surface is impossible for another molecule to create a cross-link

• The IMF of the individual monomers in the structure make it difficult for other molecules to bond.

• The highly branched and cross-linked nature of the polymer doesn't create any areas of adhesion for other molecules.

Tags

NGSS.HS-PS2-6