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High speed polymerization reaction initiated by the action

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EIRE2003
#1
May1-09, 10:54 AM
P: 109
So whats happening is a high speed polymerization reaction initiated by the action of laser light.

An infrared beam moniters the amount of unreacted acrylate double bonds. But what is an acrylate double bond? Am I correct in saying that a double bond absorbs IR radiation?
The double bond is the bond between a CH2 and a CH, in the paper that I am reading.

My next question is, why use Fourier Transform Infrared spectroscopy over any other spectroscopic technique to determine the amount of unreacted double bonds through time in a sample?
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chemisttree
#2
May1-09, 03:06 PM
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Quote Quote by EIRE2003 View Post
So whats happening is a high speed polymerization reaction initiated by the action of laser light.

An infrared beam moniters the amount of unreacted acrylate double bonds. But what is an acrylate double bond? Am I correct in saying that a double bond absorbs IR radiation?
That's the one.

The double bond is the bond between a CH2 and a CH, in the paper that I am reading.
Actually the double bond conjugated to the carbonyl is the absorbing species. The carbonyl peak shifts slightly when conjugated to the double bond.

My next question is, why use Fourier Transform Infrared spectroscopy over any other spectroscopic technique to determine the amount of unreacted double bonds through time in a sample?
You can take a FT scan in less than a second vs a scanning IR that might take a few minutes per scan.
EIRE2003
#3
May11-09, 01:05 PM
P: 109
Thank you :)


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