show the polymerization of styrene using SnCl4 as the initiator
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Draw the mechanism for the cationic polymerization of styrene using H2SO4 as initiator. Include initiation, propagation, ion pair rearrangement, and chain transfer to monomer
For polymerization of styrene in tetrahydrofuran at 25°C using sodium naphthalide initiator, the rate coefficient for propagation is 550 dm^3 mol^-1 s^-1. If the initial mass concentration of styrene is 156 g dm^-3 and that of sodium naphthalide is 3.02x10^-2 g dm^-3, calculate the initial rate of polymerization and, for complete converison of the styrene, the number-average molar mass of polystyrene formed. Comment upon the expected value of molar mass dispersity (Mw/Mn) and the stereoregularity of the polystyrene produced. Assume:...
In normal free radical processes with added initiator, the polymerization rate and kinetic chain length are proportional to the first power of monomer concentration. What would be the effect of monomer concentration on rate and chain length in the thermal polymerization of styrene (which involves no initiator)? Derive a kinetics expression to show this.Assume that initiation is based on the following equation: M + M -> 2 M. (radical in the product).
Polystyrene can be polymerized from the starting monomer (styrene) pictured below. a. Anionic polymerization is one method of polymerization that can be used to generate polystyrene from styrene. Explain what type of initiator should be used for this reaction and draw an example of a styrene monomer that has reacted with initiator. b. Using this anionic polymerization method and a starting concentration of 1M styrene and 1mM initiator, what degree of polymerization (Xn) would you expect if you use up...
Draw a mech. For polymerization using butylithium as initiator. Show the initiation one chain propagation step and use H+ to terminate growth.
A living polymerization is carried out using 150 mmol of 4-chlorostyrene and 1.2 mmol of initiator. Calculate the degree of polymerization (Pn) and number average molecular weight (Mn) of the polymer obtained if the conversion was 100%.
1. What is the mechanism of polymerization of styrene with AIBN? Initiation: Propagation: Termination (Show self-termination only):
Write a detailed mechanism for the polymerization of styrene in the presence of benzoyl peroxide. The mechanism should include three distinct steps: initiation, propagation, and termination. For propagation, show the first three polystyrene units.
3) Show mechanistically that polystyrene could also be made by adding either a radical initiator or a powerful nucleophilic initiator (for example, methyllithium) to styrene.
Draw curved arrow mechanisms for the rin cationic initiator and (b) an anionic initiator You should Then, comment on which method you expect to produce a s for the ring-opening polymerization of E-caprolactone using (a) a monic initiator Vou should show an initiation and a propagation step. od you expect to produce a narrower molar mass distribution and why. -NH E-caprolactone