None 2- For the Cationic polymerizationInitiator catalystInitiation stepPropagation stepTermination stepCIB+CIH₂ÖCI

For cationic polymerization: Initiator catalyst: Lewis acids or protic acids can act as initiator…

Answered: 2- For the Cationic polymerization…

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter31: Synthetic Polymers

Section31.2: Stereochemistry Of Polymerization: Ziegler–natta Catalysts

Problem 4P

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1. (a) Write the complete mechanism, including initiation and propagation steps, for the free-radical polymerization of the following reactants: CEN hv ROOR + 2 ?? (b) Include one termination step (not from the initiation step or some species striking a wall).
.
Living chain polymerization of monomer X follows the first-order kinetics. The corresponding propagation rate constant (kp) was determined by gas chromatography (GC), with the following monomer concentrations measured at different polymerization times, assuming instant initiation: Polymerization time (min) 0 2 5 10 15 [X]t (M) 1.80 1.52 1.27 0.95 0.74 0.50 0.25 20 30 Plot the dependence of -In([X]/[X]) on time using software specialized for graphs (e.g., Origin, SigmaPlot, not MS Excell!) and perform the linear data fitting. Export the graph in TIFF format and paste it below as an image. Make sure the graph is graphically appealing! b) From this fitting, calculate the kp of polymerization, assuming the living character of polymerization and an initial initiator concentration (an thus the constant concentration of growing centers) of 0.09 M c) What is the theoretical degree of polymerization (DP) of the prepared polymer? We assume full monomer conversion, complete initiation, absence of…
P17A.1 The following initial-rate data were obtained on the rate of binding of glucose with the enzyme hexokinase present at 1.34 mmol dm. What is (a) the order of reaction with respect to glucose, (b) the rate constant? [C,H,„O,J/(mmoldm³) 1.00 1.54 3.12 4.02 12 v/(mol dms) 5.0 7.6 15.5 20.0
2. The anionic polymerization of styrene was performed using a 1.38 mol/L solution of styrene in cyclohexane at 40 °C. The polymerization was initiated by 100x10-5 mol/L of butyl lithium and a kinetic order dependence on initiator of 0.5 was observed with an apparent rate constant of 2.4x10-2 observed. The polymerization was run from t = 0 to t= 8000 and a data point collected every t = 200 intervals. Plot [M] vs. time for this reaction.
An elementary reaction is generally expressed as: dC :-kC," dt where A is the species being depleted as the reaction progresses, k is the rate constant, and n is the order of reaction, usually referred to as the stoichiometric coefficient of the resulting product. For a polymerization reaction A> 3B, find the initial amount if after 30 seconds, A species is reduced to 5 moles/L within 3 minutes. Take the rate constant as 0.314 L?/(molľ²-min).
A characteristic of the stoichiometry of condensation (step-growth) polymerization reactions is that small molecules, like H2O, HCl or others, are released as reaction by-products. In a commercial polymerization reactor, what might be some process implications of the release of small molecules like H2O or HCl?
a) Calculate the concentration of benzoyl peroxide required to prepare polystyrene with a number-average molar mass of 750 kg mol-¹ by bulk polymerization at 60 °C. Assume: (i) the initiator is 60% efficient; (ii) the rate coefficients for initiator dissociation, propagation and termination are, respectively, 2x 10-6 s-¹, 341 dm³ mol-¹ s-¹ and 4x 107 dm³ mol s¹; (iii) the density of styrene at the polymerization temperature is 0.88 g cm3; and (iv) that ter- mination by disproportionation, and chain transfer to initiator and monomer, are negligible. 4
the question below is from Organic Chemistry and deals with Substitution RXN
I did two of these right but im a little stuck on these, help pls
Select which of the following products would be made by the chemical transformation indicated below: H₂ Lindlar's cat.
A-D pleqse

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2- For the Cationic polymerization Initiator catalyst Initiation step Propagation step Termination step CI B + CI H₂Ö CI