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Chemistry Unit 4 > Chapter 9, Polymerisation > Flashcards

Chapter 9, Polymerisation Flashcards

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0
Q

What are the smaller parts of a polymer?

A

Monomer

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1
Q

Addition polymers are formed by…

A

Using compounds containing a C=C bond.

The unsaturated molecules that then join together to form a polymer

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2
Q

Condensation polymers are formed by…

A

The reaction between molecules with 2 functional groups and involve the loss of 2 small molecules

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3
Q

What sort of molecules are lost during condensation polymerisation?

A

H2O, HCl, CH3OH

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4
Q

Dicarboxylic acid + diol =

A

Polyester

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5
Q

Dicarboxylic acid + diamine =

A

Polyamide

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6
Q

Amino acids can be polymerises to form…

A

Polyamides

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7
Q

What is a diol?

A

An alcohol containing 2 hydroxyl groups

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8
Q

What is Kevlar?

A

A polyamide which forms fibres of great strength, stability and fire-resistance

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9
Q

What are common uses of Kevlar?

A

Bullet proof vests

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10
Q

What is Kevlar formed from?

A

Benzene-1,4-dicarboxylic acid + benzene-1,4-diamine

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11
Q

What IMF is there in Kevlar?

A

Extensive hydrogen bonding

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12
Q

How biodegradable are polymers?

A

Although named as polyalkanes they have no C=C.
They are non-polar and are chemically inert.
They are therefore non-biodegradable.

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13
Q

What sort of environmental issues to polymers present?

A

As they are non-biodegradable they are put into landfills and their disposal is a massive problem

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14
Q

Recently ___ polymers and their use is ___ ___

A

Biodegradable

Gradually increasing

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15
Q

What do polyamides and polyesters undergo in landfills?

A

(Enzyme catalysed)/hydrolysis which makes them biodegradable

16
Q

What other way is there of disposing of polymers?

A

Incineration as they are flammable

17
Q

What is the disadvantages of incinerating polymers?

A

The release toxic gases when burnt

18
Q

What is the advantages of using incineration to dispose of polymers?

A

It produces a net energy yield and significantly reduces household landfill waste

19
Q

What can help to overcome some disposal problems

A

Recycling

20
Q

What recycling processes are most common for polymers?

A

Thermoplastics are melted down and remoulded

21
Q

Why does recycling still have its problems?

A

Fossil fuels used in the process mean the savings are minimal.
All of the different types of polymers must be separated out beforehand- time

Chemistry Unit 4 (14 decks)

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