Polymer molecules (AQA GCSE Chemistry Combined Science): Flashcards
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What are polymers?
What are polymers?
Very large molecules made from repeating units joined by covalent bonds
Type of bonds connecting repeating units
Type of bonds connecting repeating units
Covalent bonds
What is a repeating unit?
What is a repeating unit?
Smallest part of polymer showing the pattern
Strength of covalent bonds in polymers
Strength of covalent bonds in polymers
Strong
Intermolecular forces in polymers
Intermolecular forces in polymers
Relatively strong
Why do polymers have strong intermolecular forces?
Why do polymers have strong intermolecular forces?
Large size means more surface contact between molecules
Melting points of polymers
Melting points of polymers
High
Why do polymers have high melting points?
Why do polymers have high melting points?
Need lots of energy to break strong intermolecular forces
Physical state of polymers at room temperature
Physical state of polymers at room temperature
Solid
Why are polymers strong materials?
Why are polymers strong materials?
Long chains & strong forces make them tough
What does empirical formula show?
What does empirical formula show?
Simplest ratio of atoms