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Chemistry > 9.17-9.25 Polymers > Flashcards

9.17-9.25 Polymers Flashcards

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1
Q

What is a polymer?

A

A substance of high average molecular mass made up of amll repeating units

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2
Q

What happens in addition Polymerisation?

A

.Many small molecules join together to make very large molecules

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3
Q

What can any Alkene be used as?

A

A monomer to create a polymer due to the carbon-carbon double bond

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4
Q

What is a monomer the same as?

A

The repeat unit

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5
Q

Give the properties of Polyethene

A

.Flexible
.Cheap
.Electrical insulator

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6
Q

Give the uses of Polyethene

A

.Plastic Bags
.Bottles
.Coating on electrical wires

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7
Q

Give the properties of Polypropene

A

.Flexible

.Strong

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8
Q

Give the uses of Polypropene

A

.Buckets

.Crates

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9
Q

Give the properties of Polychloroethene (PVC)

A

.Tough
.Cheap
.Long lasting

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10
Q

Give the uses of PVC

A

.Window Frames

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11
Q

Give the properties of PTFE

A

.Tough

.Non stick

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12
Q

Give the uses of PTFE

A

Non stick coating on pans

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13
Q

Why are polyesters condensation polymers?

A

.In condensation polymerisation a small molecule is formed as a by product
.This is an ester therefore a polyester is lots of these monomers

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14
Q

How is a polyester formed when a monomer molecule containing two carboxylic acid groups is reacted with a monomer molecule containing two alcohol groups?

A

.The dicarboxylic acid loses the OH group off each COOH group
.The di alcohol loses the H off each OH group
.The remaining molecules join together to make a polyester

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15
Q

How is a molecule of water formed each time an ester link is formed?

A

.The OH and H groups combine to make H2O

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16
Q

Give two advantages of recycling polymers

A

.Reuse waster materials-better for the environment than burning them or putting them in landfills
.Saves Crude oil (A finite resource)
.More economically viable instead of making more polymers

17
Q

Give a disadvantage of recycling Polymers

A

.Difficult and expensive to first separate the different polymers

18
Q

True or False? DNA is a polymer

A

True

19
Q

How many different monomers is DNA made from/

A

4

20
Q

What are the 4 monomers in DNA known as?

A

Nucleotides

21
Q

What is starch?

A

A polymer based on sugars

22
Q

What are proteins based on?

A

Polymers built on Amino Acids

Chemistry (25 decks)

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