Polymers And Alkenes

Question 1

What is a monomer

Answer 1

Small molecules that join together to make polymers

Question 2

What is addition polymerisation

Answer 2

Formation of long chain molecules(polymers) from lots of small molecules(monomers) joining together with no other products

Question 3

How to write a polymerisation equation

Answer 3

-write monomer with double bond with n in front
-arrow to brackets around repeating unit with bonds sticking out of brackets and n outside at bottom of brackets

Question 4

Conditions for formation of low density poly(ethene) LDPE

Answer 4

200 degrees Celsius, 2000atm so moderate temperature and high pressure and oxygen

Question 5

Properties of LDPE and uses

Answer 5

-branched so molecules loosely packed
-flexible and soft so used in bags and cling film

Question 6

Conditions for production of high density poly(ethene)

Answer 6

60 degrees Celsius, 2 atm and Ziegla-Natta catalyst

Question 7

Properties of HDPE

Answer 7

-molecules tightly packed as fewer branches
-stiffer and harder= buckets and bottles

Question 8

What is a primary halogenoalkane

Answer 8

One in which the carbon in the carbon-halogen bond is bonded to only one other carbon atom

Question 9

What is a secondary halogenoalkane

Answer 9

One in which the carbon in the carbon-halogen bond is bonded to two other carbon atoms

Question 10

What is a tertiary halogenoalkane

Answer 10

One in which the carbon in the carbon-halogen is bonded to three other carbon atoms

Question 11

What is a polymer

Answer 11

A long chain molecule made from lots of small molecules joined together