Tacticity – stereo isomerism
June 18th, 2008
No comments
Polymer tacticity is another important different in structure. For example, in the polymer formed from the monomer CH2=CHX the X group can take a random configuration ( atactic polymer ), an alternating configuration ( syndiotactic ) or the same configuration ( isotactic polymer ) along the chain. These different forms are shown below.
important point
different structure give rise to very different properties
For example liner polyethylene has a melting point 20C higher than branched polyethylene. Unlike linear and branched polymers, network polymers do not melt and will not dissolve in solvents. The effect of structure on polymer properties is called the “Structure-Property Relationship“.
[ad#aryshi1]
