a) Draw (ACTUALLY DRAW THE STRUCTURE) the polymer structure that would result from the following polymerization. Show correct parantheses placement, as well as any initiator/terminating end groups. b) What would happen to the dispersity of this polymer if the quantity of AIBN was increased to at or above the quantity of chain transfer agent? S: Et₂N S CN 2% AIBN
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- Q1: Clarify the differences between the cationic and anionic polymerization in propagation step. Q2: What is the function of catalyst in coordination polymerization? Q3: Explain briefly the classifications of step growth polymerization.4. Consider the free radical polymerization of methyl methacrylate (shown below) using AIBN as the initiator. (a) Show the repeat structure of the polymer derived from this monomer. methyl methacrylato (b) What structure will be on the initiated end of the polymer? (c) Relative to part (b), what will be the structure at the terminal end of the polymer? Show all possibilities (there is more than one).2) For the monomer given determine what type of polymerization (radical, anionic, cationic, and/or step-wise) it will undergo most readily or if it will not undergo polymerization at all. Explain your answer. A.
- One common type of cation exchange resin is prepared by polymerization of a mixture containing styrene and 1,4-divinylbenzene . The polymer is then treated with concentrated sulfuric acid to sulfonate a majority of the aromatic rings in the polymer. Q.) Show the product of sulfonation of each benzene ring.Show by means of chemical equations the initiation, propagation, transfer and termination steps (if any) in the linear chain polymerizations a) – d) below. For each reaction, clearly show the initiating species, active center, repeating unit and end- groups of the polymer chains that are formed and comment on the mechanism involved: a) Styrene initiated with potassium amide in liquid ammonia as solvent. b) Isobutylene (2-methylpropene) initiated with boron trichloride/tert-butyl chloride as catalyst in methyl chloride as solvent. c) 1,3-Butadiene initiated with n-buytylithium (CAH9LI) in tetrahydrofuran (THF) at 30°C and quenched with ethylene oxide followed by acidification. d) Propylene oxide initiated with potassium methoxide in methanol as solvent.An amionic polymerization is proceded in tetrahydrofuran and 1,4-dioxane, respecively. Anionic inititos (RLi" and R'K) comprising lithium or potassium ion as counterions are respectively utlized in each solvent system. Please compare their rate constants for propagation (k,3), and rationalize your answer. (10%)
- 7 Provide a concise explanation for why, in the case of polymerisation shown below where the monomer conversions are high, the polydispersity values of the polymer produced will s are exceed 1. H2N. `NH2 2 HCI foreQUESTION1: (this is the full question however can you answer part c,e and f) Methyl methacrylate is polymerized by free radical polymerization at 70 oC to form long polymer chains.(a) Draw the chemical structure of methyl methacrylate, define its molecular formula and molecular weight (in g/mol). (b) If benzoyl peroxide is used as the initiator for the polymerization of methyl methacrylate please write the chemical structures of the compounds formed during the initiation step ofthe polymerization. What would happen if the reaction is not heated at 70 oC? (c) Write the chemical structures of the polymers formed during the propagation and termination steps of the polymerization. (d) Write the trade name of the polymer formed by the polymerization of methyl methacrylate and two of its common applications. (e) If a polymer with degree of polymerization 100 is synthesized during the reaction, determine its molecular weight (in g/mol). (f) If from the polymerization of methyl methacrylate a…(a) What is the difference between an addition polymer and a condensation polymer?(b) PVC or poly(vinyl chloride) is an addition polymer prepared by a chain of radical addition steps. Show mechanism for the propagation step (with curved single-barb arrows) for a single radical addition step, using the radicals shown, then draw the radical product. Note that the addition occurs so as to place the radical onto the CH2.
- 1. Step-Growth Polymerization (a) Draw 2 different combinations of monomers that can be used to synthesize the following polymer and the by-products for each. .. (b) If you were asked to make this polymer on an industrial scale, which of the monomers you have selected in part (a) would you choose? In your answer, provide at least 2 engineering-related rationales your choice by considering the availability/price of the starting materials, any safety considerations for associated with using the materials/the process, or any other scalability considerations.Draw the brief arrow pushing mechanism of the formation of this polymer(synthesis of Nylon (6,6)Q) The monomer 1 can be polymerised via ring opening metathesis polymerisation. 1 By varying the monomer to catalyst ratio, it is possible to control the degree of polymerisation of the resulting polymer. Explain why.