Polymers and Their Properties Flashcards

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What is a polymer?

A very large molecule made of many small units (monomers) in long chains.

What is a monomer?

A small molecule that can join to others to form a long polymer chain.

What is a repeating unit in a polymer?

The small pattern of atoms that repeats along the chain.

What type of bonds hold atoms together in one polymer chain?

Strong covalent bonds.

What forces act between different polymer chains?

Intermolecular forces between chains, stronger than in small molecules.

Why do polymers usually have higher melting points than small molecules?

Many intermolecular forces between long chains must be overcome, so more energy is needed.

Why can many polymers be stretched or bent?

Their long chains can slide past each other if forces are not too strong.

Do most polymers conduct electricity?

No. They have no free electrons or ions to carry charge.

Why are polymers often used for packaging, like bags and bottles?

They are light, tough, and can be moulded into many shapes.

At room temperature, what state are most polymers and why?

Solids, because forces between their long chains are relatively strong.