* Condensation Polymerization: This process involves the joining of monomers (small molecules) to form a polymer chain. This reaction is characterized by the loss of a small molecule, like water, as the monomers bond.
* Functional Groups: These are reactive parts of a molecule, such as hydroxyl (-OH), carboxyl (-COOH), or amine (-NH2) groups. Condensation polymerization relies on the reaction between two functional groups, resulting in the formation of a new bond and the release of a small molecule.
* Single Functional Group Limitation: If a molecule has only one functional group, it can only form one bond. This means it cannot react with another molecule of the same type to create a chain. There is no other functional group to react with for continued chain growth.
Example:
* Ethylene glycol (HO-CH2-CH2-OH): This has two hydroxyl groups, enabling it to react with another ethylene glycol molecule, forming a dimer and releasing water. This process can repeat, forming a long chain polymer called polyethylene glycol.
* Methanol (CH3OH): This has only one hydroxyl group. It cannot react with another methanol molecule to form a chain because there's no other functional group to react with.
In summary: Condensation polymerization requires monomers with at least two functional groups that can react with each other to form a chain. A molecule with only one functional group cannot participate in this process.
