S2.4.5 Addition polymers

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6 Terms

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What is addition polymerization?

Process where unsaturated monomers (with C=C) join to form a polymer.

No by-products formed.

<p>Process where unsaturated monomers (with C=C) join to form a polymer. </p><p>No by-products formed.</p>
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Role of monomers in polymerization

Monomers are small unsaturated molecules.

They repeat to form the large polymer chain.

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PVC (polyvinyl chloride)

Formed from chloroethene monomers.

Repeating unit includes –CH₂–CHCl– groups.

<p>Formed from chloroethene monomers. </p><p>Repeating unit includes –CH₂–CHCl– groups.</p>
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Polypropene (polypropylene)

Formed from propene monomers.

Repeating unit contains –CH₂–CH(CH₃)–.

<p>Formed from propene monomers. </p><p>Repeating unit contains –CH₂–CH(CH₃)–.</p>
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Poly(2-methylpropene)

Made from 2-methylpropene monomers.

Also known as butyl rubber.

<p>Made from 2-methylpropene monomers. </p><p>Also known as butyl rubber.</p>
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What is a repeating unit?
Smallest segment of a polymer chain that repeats to form the whole polymer.
Smallest segment of a polymer chain that repeats to form the whole polymer.