3.3.12- polymers

Question 1

How are condensation polymers formed
And give 2 examples of condensation polymers

Answer 1

2 molecules react together with elimination of small molecule
Polyesters and polyamides are polymers formed using this mechanism

Question 2

In order for condensation reaction occur

Answer 2

2 func groups react with each other

Question 3

One of way of forming polyester

Answer 3

Dicarboxylic acid + diol

Question 4

Ester linkage

Answer 4

O
//
C
\
O

Question 5

3 ways of forming polyester

Answer 5

dicarboxylic acid + diol
Single monomer (COOH + OH func group present)

Question 6

the repeating unit for a polyester made from a diacarboxylic acid and diol contains

Answer 6

2 carbonyl groups
2 oxygen groups
the atoms between 2 oxygen groups
the atoms between 2 carbonyl groups

Question 7

polyesters can be made from a singe monomer containing …

Answer 7

carboxylic acid functional group
alcohol functional group

Question 8

Explain using single monomers to form a polyester and use example

Answer 8

Lactic acid is an example of such monomer
It contains -COOH + -OH groups
that react to form esters
Form polylactic acid
Obtained from corn so biodegradable polymer

Question 9

naming diols

Answer 9

Carbon stem then numbers then diol
Eg propane - 1,3 - diol

Question 10

Carboxylic acid + amine&raquo_space;>

Answer 10

Amide + water

Question 11

Acyclovir chloride + primary amine&raquo_space;>

Answer 11

Amide + HCL

Question 12

2 ways to form polyamides

Answer 12

Dicarboxylic acid + diamine
or
single monomer containg NH and COOH func group

Question 13

amide link

Answer 13

O
||
C
|
N
|
H

Question 14

Named example of polyamide

Answer 14

Kevlar

Question 15

Kevlar made by

Answer 15

Reacting di carboxylic acid w benezne in the middle
Reacting diamine w benzene in the middle

Question 16

Uses of Kevlar and nylon

Answer 16

Strong
Resistant for fire
Flexible

Question 17

Nylon can be formed w diamine and diacyldochlorife why is it not

Answer 17

More expensive and hcl gas

Question 18

Are polyesters and polyamides biodegradable or not and why

Answer 18

Yes they are biodegradable
As they can undergo hydrolysis to break the polymer down into the monomers
Hydrolysis can be under acidic or basic conditions

Question 19

C=O absorbs _______ making condensation polymers ________

Answer 19

C=O absorbs infrared radiation making condensation polymers photodegradable

Question 20

Base hydrolysis of a polyester gives

Answer 20

Sodium salt of the Dicarboxylic acid
And diol

Question 21

Acid hydrolysis of a polyester gives

Answer 21

Dicarboxylic acid and diol

Question 22

Base hydrolysis of a polyamide gives a

Answer 22

Sodium salt of a diacarboxylic acid and a diamine

Question 23

Under acid hydrolysis conditions hydrolysis if polyamide gives

Answer 23

Diamine accepts proton to form ammonium ions and the Dicarboxylic acid is also formed