Polyesters And Polyamides Flashcards
How is a polyester synthesised?
In a condensation reaction between diol and dicarboxylic acid monomers (dicarboxylic acid derivatives can also be used such as acid anhydrides and acyl chlorides)
When synthesising polyesters, what other molecules form?
Smaller molecules such as HCl and H2
How are polyamide synthesised?
In a condensation reaction between diamine and dicarboxylic acid monomers (dicarboxylic derivatives can be used such as acyl chlorides or acid anhydrides)
When synthesising polyamides, what other molecules form?
HCl or H2
A)How are polypeptides synthesised?
B)what are polypeptides a type of?
A)In a condensation reaction between alpha amino acids (a-glucose)
B)Polyamide
A)What functional groups do alpha amino acids contain?
B)What do these groups react to form?
A) a carboxylic acid group and an amine group at either end.
B)amide linkage
What are the different ways polyester can be hydrolysed?(in order of their speed)
- With an alkali
- With dilute acid, the reaction proceeds more slowly
- With water, although it is so slow it is barely noticeable
What are the different ways that polyamides can be hydrolysed?(in order of their speed)
- With a strong acid, it will be faster the hotter it is
- with an alkali, the reaction proceeds more slowly
- with water, the reaction is so slow it isn’t noticeable
