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6 Cards in this Set
- Front
- Back
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What are the types of modification? |
Increase chain length Cross linking Vulcanisation Plasticisers Crystalline polymer |
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Increasing chain length |
The longer molecules are stronger |
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Cross-linking |
•Formed by atoms bonding between the polymer molecules •The atoms are no longer able to move, makes a harder material |
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Vulcanisation |
From cross linking •sulfar and rubber cross links •used for tyres and conveyor belts |
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Plasticisers |
•softer and more flexible •small molecule that sits between the molecules and forces chains further apart •makes the forces between chains weaker |
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Crystalline polymer |
The molecules are packed closer together Stronger intermolecular forces |
