addition polymerization


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addition polymerization

[ə¦dish·ən pə‚lim·ə·rə′zā·shən]
(organic chemistry)
A reaction initiated by an anion, cation, or radical in which a large number of monomer units are added rapidly (a chain reaction) until terminated by some mechanism, forming a high-molecular-weight polymer in a very short time; an example is the free-radical polymerization of propylene to polypropylene.
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0 was shown large enough to extinguish the free radical polymerization and, therefore, it was chosen for studying the BMI/BTA Michael addition polymerization kinetics hereinafter.
Under the circumstance, the crosslinking density and, consequently, the viscosity increase continuously with the progress of the Michael addition polymerization of the difunctional BMI with the tetrafunctional BTA.
1]) are the diffusion-controlled and the reaction-controlled Michael addition polymerization rate constants, respectively, C an adjustable constant that is the characteristic of the diffusion-controlled Michael addition polymerization, and [X.
Based on the kinetic model, the Michael addition polymerization rate constants in the range of 2.
The initial composition of the reaction mixture ([theta]) must be determined before the computer simulation for the isothermal Michael addition polymerizations of BMI with BTA can be carried out.
a] (= -slope X R) for the Michael addition polymerizations of BMI/BTA (2/1 (mol/mol)) is estimated to be 36.
the conversion of the -C=c- associated with BMI may be underestimated) because of the competitive reaction of BMI with BTA via the Michael addition polymerization mechanism.
2] group of BTA consumed by HQ was underestimated significantly during the Michael addition polymerization of BMI/BTA in the presence of HQ, as reflected in the quite high value of [theta] (= [[[B.
a kinetic model for the Michael addition polymerization of BMI/BTA in the presence of sufficient HQ (HQ/BTA = 1/1 (w/w)) to completely quench the free radical polymerization was developed, and the major governing equations (Eqs.
M] is the total Michael addition polymerization rate, and the first and the second terms on the right hand are the Michael addition polymerization rates corresponding to the polymerizations of the -C=C- group of BMI with the >[CH.
In an attempt to take into account the side reaction of BTA with HQ during the Michael addition polymerization of BMI with BTA in the presence of HQ, the following rate expression for the consumption of the active hydrogen atoms of the >[CH.