Molecular Mass: Polymers

Which type of molecular weight average is considered most useful for correlating with physical properties of polymers?

• Volume average

• Z average

• Weight average

• Number average

What is a common characteristic of polymers that resist environmental degradation?

• Low density

• High molecular weight

• CC backbone structure

• Presence of ester bonds

How can biodegradability be introduced into polymers?

• By using a CC backbone

• By adding chemical linkages like anhydride bonds

• By reducing polymer density

• By increasing molecular weight

PHBV is a biodegradable polymer obtained through the copolymerization of which acids?

• Lactic acid and glycolic acid

• Acrylic acid and methacrylic acid

• Three hydroxy butanoic acid and three hydroxy pentanoic acid

• Caprolactam and adipic acid

Nylon 26 is an alternating polyamide copolymer of which two components?

• Caprolactam and adipic acid

• Adipic acid and hexamethylenediamine

• Lactic acid and glycolic acid

• Glycine and aminocaproic acid