tacticity
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thumb|right|A ball-and-stick model of syndiotactic polypropylene.
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Article
19 sectionsContents
- Definition
- Diads
- Triads
- Tetrads, pentads, etc.
- Other conventions for quantifying tacticity
- Polymers
- Isotactic polymers
- Syndiotactic polymers
- Atactic polymers
- Eutactic polymers
- Effect on polymer properties
- Stereocontrolled polymerization
- Polymer chain-end control
- Enantiomorphic site control
- Head/tail configuration
- Techniques for measuring tacticity
- References
- Further reading
- External links
thumb|right|A ball-and-stick model of syndiotactic polypropylene.
Tacticity (from , "relating to arrangement or order") is the relative stereochemistry of adjacent chiral centers within a macromolecule. The practical significance of tacticity rests on the effects on the physical properties of the polymer. The regularity of the macromolecular structure influences the degree to which it has rigid, crystalline long range order or flexible, amorphous long range disorder. Precise knowledge of tacticity of a polymer also helps understanding at what temperature a polymer melts, how soluble it is in a solvent, as well as its mechanical properties.