Addition Polymers (HSC SSCE Chemistry): Flashcards

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Addition Polymers
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Addition polymers

Large molecules from monomers joined without loss of atoms

Monomer requirement for addition polymerisation

Must contain C=CC=C double bond

LDPE structure

Branched chains, amorphous (disordered) structure

HDPE structure

Linear unbranched chains, crystalline (ordered) structure

HDPE melting point

135°C135°C

Crystalline regions in polymers

Ordered, closely packed chains with stronger forces

PTFE (Teflon) key property

Non-stick surface, chemically inert

PVC intermolecular bonding

Dipole-dipole interactions from polar C—ClC—Cl bonds

Isotactic polypropylene structure

All methyl groups on same side of chain (strongest form)

Copolymer

Polymer made from two or more different monomers

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