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Question 6 and please show the mechanism
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- Show the structure of the polymer that results from heating the following diepoxide and diamine:The polymer shown below is synthesized by hydroxide ion-promoted hydrolysis of a copolymer of para-nitrophenyl methacrylate and acrylate. a. Propose a mechanism for the formation of the copolymer. b. Explain why hydrolysis of the copolymer to form the polymer occurs much more rapidly than hydrolysis of para-nitrophenyl acetate.Delrin (polyoxymethylene) is a tough self-lubricating polymer used in gear wheels. It is made by polymerizing formaldehyde in the presence of an acidcatalyst. Is Delrin a chain-growth polymer or a step-growth polymer?
- Delrin (polyoxymethylene) is a tough self-lubricating polymer used in gear wheels. It is made by polymerizing formaldehyde in the presence of an acid catalyst. a. Propose a mechanism for formation of a segment of the polymer. b. Is Delrin a chain-growth polymer or a step-growth polymer?Show the intermediate that would result if the growing chain added to the other end of the styrene double bond. Explain why the final polymer has phenyl groups substituted on every other carbon atom rather than randomly distributedWhat epoxy resin is formed by the following reaction sequence?
- (a) Draw the structure of the prepolymer A formed from 1,4-dihydroxybenzene and excess epichlorohydrin. (b) Draw the structure of the cross-linked polymer B formed when A is treated with H2NCH2CH2CH2NH2 as the hardening agent.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.Which monomer and which type of initiator can you use to synthesize each of the following polymers?
- a) Draw the structure of the prepolymer A formed from 1,4 dihydroxybenzene and excess epichlorohydrin. (b) Draw the structure of the cross-linked polymer B formed when A is treated with H2NCH2CH2CH2NH2 as the hardening agent.(a) Hard contact lenses, which first became popular in the 1960s, were made by polymerizing methyl methacrylate [CH2=C(CH3)CO2CH3] to form poly(methyl methacrylate) (PMMA). Draw the structure of PMMA. (b) More-comfortable softer contact lenses introduced in the 1970s were made by polymerizing hydroxyethyl methacrylate [CH2=C(CH3)CO2CH2CH2OH] to form poly(hydroxyethyl methacrylate) (poly-HEMA). Draw the structure of poly-HEMA. Because neither polymer allows oxygen from the air to pass through to the retina, newer contact lenses that are both comfortable and oxygen-permeable have now been developed.A3 Anionic polymerization of styrene is generally known to produce polymers with a narrow molecular weight distribution. Explain the reason for this.