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unsaturation

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unsaturation [¦ən‚sach·ə′rā·shən]
(organic chemistry)
A state in which the atomic bonds of an organic compound's chain or ring are not completely satisfied (that is, not saturated); usually applies to carbon, but can include other ring or chain atoms; unsaturation usually results in a double bond (as for olefins) or a triple bond (as for the acetylenes).
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Polymeric forms of Type II coagents include poly(butadienes) with pendant vinyl unsaturation (ref.
Utilizing coagents in the electron beam cure of elastomers by Boye, William M. / Rubber World
Therefore, the assumption of first order, which is valid for elastomers with high degree of unsaturation like BR and natural rubber (NR), is not true for the elastomers with low unsaturation like poly(iso-butylene) (IIR), as far as addition reactions are concerned.
Simulation of chemical kinetics of elastomer crosslinking by organic ... by Likozar, Blaz; Krajnc, Matjaz / Polymer Engineering and Science
Therefore, the unsaturation degree of resins can be controlled easily by comonomers.
Molecular design and application of divinyl monomers to synthesis of ... by Chen, Song; Li, Xiao Yn / JCT Research
 
 
 
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