Addition Polymer ( hydration of ethene )

What is the product when Alkene reacts with steam ?

Alkene + steam → Alcohol

What catalyst is used in this reaction ?

Using H3 PO4

H + + H2 PO4 —> H3 PO4

What are the conditions for this reaction ?

H3 PO4 Catalyst

Temp : 30 *C

Pressure : 60 atm

Addition Polymers

Polymers :

BIG molecules , produced from tiny monomers

Made from monomers with Alkenes

We polymers are polymerase , the C = C double bind will open up and form a big chain of C - C

What are the conditions for High Density Polyethene ?

Temp : 60 *c

Pressure : 1 atm

Zeigier Natta Catayst

What does high density polyethene produces ?

Polymers with little branching

Chains pack together well - so high density and higher MPT

Uses in milk bottles and buckets

What are the conditions for low density polyethene ?

Temp : 200 *c Pressure

Pressure : 2000 atm

Free radical substitution

What does low density polyethene produces ?

Large chain - branched polymers

Chains don’t pack well - flexible / low density

Use : plastic bags / cable insulation

Recycling / Mechanical

Separate different types of plastics

Wash the plastic

Melted / remoulded

Recycling / Feedstock

Heat plastic to break polymer bonds

Produces monomers

What is plasticizsers ?

Small molecules set in between polymer chains

Allow chain to side easier

Make polymers more flexible