A.1C CHAIN-GROWTH POLYMERS
- Polypropylene is an example of chain-growth polymers (addition polymers):
H 2 C CH
CH 3polymerization CH
2 CH
CH 3CH 2 CH CH 2 CH
CH 3
Propylene Polypropylenen CH^3A.1D MECHANISM OF POLYMERIZATION
- The addition reactions occur through radical, cationic, or anionic mechanisms:
- Radical Polymerization
R CC R CC R CCCCCC
+CC
etc.2) Cationic PolymerizationR+ CC R CC+ R CCCC+CC
+CC
etc.3) Anionic PolymerizationZ:− CC Z C C:− Z CCCC:−CC
+CC
etc.