Monomer & Polymer

[Tinamuline]

I would appreciate it if someone could tell me whether it is a physical change or chemicla change when monomer changes to polymer through the process of polymerisation. Most chemistry textbooks mentioned that it is a chemical change because the chemcial properties of polymer and monomer are totally different from each other. However, will there be any exception?
Please help.

 

[johnchau123]

I would appreciate it if someone could tell me whether it is a physical change or chemicla change when monomer changes to polymer through the process of polymerisation. Most chemistry textbooks mentioned that it is a chemical change because the chemcial properties of polymer and monomer are totally different from each other. However, will there be any exception?
Please help.

Based on my fundamental chemistry knowledge, I think there is no exception.
Let take 2 examples.
Addition polymerization
The polymerization from ethene to polyethene has changed the double bond in ethene into single bond. So, there is chemical change.
Condensation polymerization
1,6-diaminohexane and hexanedioic acid will react to form nylon under polymerization. However, nylon has a amide group while the monomer has no. So, there is also chemical change.