8.11.1 Macromolecules and their solutions 2. Definition of macromolecules Macromolecules: a chain-like molecule with its molar mass higher than 10000 Natural macromolecules: protein, starch, cellulose Artificial macromolecules: PE, PP, PS, nylon-66Macromolecules: a chain-like molecule with its molar mass higher than 10000. Natural macromolecules: protein, starch, cellulose; Artificial macromolecules: PE, PP, PS, nylon-66 8.11.1 Macromolecules and their solutions 2. Definition of macromolecules