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Nuclear magnetic resonance microstructure effects

The properties of some polymers are dependent on their microstructure for example isotactic polypropylene is crystalline whereas atactic polypropylene is amorphous. Microstructure effects are also exemplified by polybutadienes, where the mode of addition of the diene to the growing chain leads to 1,2-addition, 1,3-addition and 1,4-addition, which may be as or trans. The fraction of different addition species changes the mechanical properties of the polymer. Another example is provided by the chemical composition of a copolymer and its sequence distribution, which together determine its ultimate properties. It is thus of great importance to be able to characterize polymer micro structure. This is generally done using spectroscopic methods, specifically infrared spectroscopy and nuclear magnetic resonance spectroscopy. [Pg.55]

See other pages where Nuclear magnetic resonance microstructure effects is mentioned: [Pg.18]    [Pg.541]    [Pg.18]    [Pg.36]    [Pg.89]    [Pg.353]    [Pg.679]    [Pg.50]   
See also in sourсe #XX -- [ Pg.81 , Pg.85 , Pg.86 , Pg.87 , Pg.88 , Pg.89 , Pg.90 , Pg.91 , Pg.92 , Pg.93 , Pg.94 , Pg.95 , Pg.96 , Pg.97 ]



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Effect resonance

Magnetic effective

Magnetic effects

Microstructural effect

Microstructure effects

Nuclear effective

Nuclear effects

Nuclear magnetic resonance effects

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