what characteristics must a molecule have to be part of

a) a condensation polymer
b) a addition polymer

http://en.wikipedia.org/wiki/Condensation_polymerization

http://en.wikipedia.org/wiki/Addition_polymer

a) For a molecule to be part of a condensation polymer, it must have the following characteristics:

1. Functional groups: The molecule should have two or more reactive functional groups, such as hydroxyl (OH), carboxyl (COOH), or amine (NH2) groups. These functional groups are capable of undergoing condensation reactions.

2. Condensation reaction: The molecule should be able to form covalent bonds with other molecules through a condensation reaction. In this reaction, a small molecule, like water or an alcohol, is usually eliminated as a byproduct.

3. Polymerization: The condensation reaction of the molecule should lead to the formation of longer polymer chains by linking together multiple monomer units.

4. Ability to repeat: The molecule should have repeating structural units that can be linked through condensation reactions, resulting in the formation of a polymer.

b) For a molecule to be part of an addition polymer, it must have the following characteristics:

1. Unsaturated bonds: The molecule should contain at least one unsaturated carbon-carbon double or triple bond (C=C or C≡C). These unsaturated bonds provide reactive sites for polymerization.

2. Polymerization: The molecule should undergo a polymerization reaction called addition polymerization, where the double or triple bond is converted into a single bond, and the monomer units combine to form a longer polymer chain.

3. Lack of byproducts: Unlike condensation polymerization, addition polymerization does not produce any byproducts such as water or alcohol. The monomer units simply add together, forming the polymer chain without any elimination of small molecules.

4. Ability to repeat: The molecule should have repeating monomer units that can undergo addition polymerization, leading to the formation of a polymer with a long chain.

a) A molecule must have certain characteristics to be part of a condensation polymer. Condensation polymers are formed through a reaction called condensation polymerization, which involves the elimination of a small molecule, such as water or alcohol, during the polymerization process. Some key characteristics include:

1. Functional Groups: The molecule should have at least two functional groups capable of reacting with each other to form a covalent bond. Common functional groups involved in condensation polymerization are carboxyl (-COOH), amino (-NH2), and hydroxyl (-OH) groups.

2. Monomer Structure: The molecule should consist of two or more monomers, capable of joining together through a condensation reaction. The reactive functional groups on each monomer will react with each other, leading to the formation of a polymer.

3. Reactivity: The functional groups on the molecule should be reactive enough to undergo a condensation reaction. This means they should have the ability to form covalent bonds by releasing a small molecule as a byproduct, such as water or alcohol.

4. Molecular Weight: The molecule should have a sufficient molecular weight to form a stable and long-chain polymer. This typically requires a complex structure with multiple monomers and functional groups.

b) On the other hand, addition polymers are created through addition polymerization, where monomers chemically add to each other without the elimination of any byproducts. The characteristics required for a molecule to be part of an addition polymer include:

1. Unsaturated Bonds: The molecule must possess unsaturated bonds, such as carbon-carbon double bonds (C=C) or carbon-carbon triple bonds (C≡C). These unsaturated bonds are reactive and undergo addition reactions with other monomers, resulting in chain growth.

2. Monomer Reactivity: The unsaturated bonds should be capable of undergoing addition reactions with other monomers. This means the presence of reactive functional groups or unsaturated carbons that can participate in addition reactions.

3. Stability: The molecule should be stable enough to undergo polymerization reactions without undergoing unwanted side reactions or degradations.

4. Molecular Weight: Similar to condensation polymers, addition polymers require a sufficient molecular weight to form a stable and long-chain polymer. This is achieved by having multiple monomers capable of addition reactions, leading to chain growth.

It is important to note that while these characteristics broadly define the requirements for condensation and addition polymers, the specific details may vary depending on the reaction mechanism, monomers involved, and polymerization conditions.