Answer: Polymers are complex molecules composed of random sequences of atoms.
Explanation:
Polymers are macromolecules made up of repetitive units, linked through covalent bonds. They can be classified as Natural (Wood, rubber, protein) or Synthetic (PVC, polystyrene, polypropylene). Polymers are composed of macromolecules obtained by the polymerization of simple compounds called "monomers". Regarding the shape of the polymeric chain, polymers can be classified into:
linear, when the chain has no branches;
branched when the chain has small side chains (branches);
cross-linked when the chains are joined by chemical crosslinks
