Concept explainers
Interpretation:
To give the step by step anionic
Concept introduction:
Poly (ethylene glycol) is a polyether which is obtained from the anionic polymerization of ethylene oxide (C2H4O). The anionic polymerization of ethylene oxide is complicated by the association phenomenon and the participation of ion-pair and free ion intermediates in the propagation reactions.
Anionic polymerization takes place where the monomer unit have a EWG (elctron withdrawing group). This type of polymerization proceeds with the addition of the nucleophile with the monomer’s double bond. The nucleophile may be hydroxide, cyanide etc. On other hand it can also be initiated by the elctron transfer from the alkali species used as an catalyst.
In general there is no termination step. The reaction will continue till all the monomer and the catalyst have been consumed.
Anionic polymerization is also called living polymerization as the reaction will again start when the monomer and catalyst is added to it.
Want to see the full answer?
Check out a sample textbook solutionChapter 31 Solutions
Organic Chemistry
- Draw a structural formula of the polymer resulting from base-catalyzed polymerization of each compound. Would you expect the polymers to be optically active? (S)-(+)-lactide is the dilactone formed from two molecules of (S)-(+)-lactic acid.arrow_forwardIn a non-acid catalyzed step-growth polymerization between A-A and B-B monomers, the A groups are titratable by aqueous base (1 N) and [A-A] [B-B) = 6 mol.kg-1. a) What is the DP if it takes 100 mL of base to neutralize the reaction mixture at 700 minutes of reaction time (assuming the initial total weight 500 g)?...arrow_forwardShow three units of a linear silicone polymer made from (CH₃)₂Si(OH)₂ with some (CH₃)₃SiOH added to end the chain.arrow_forward
- Kodel is a condensation polymer made from terephthalic acid and 1,4-cyclohexanedimethanol. Write the structure of the resulting polymer.arrow_forwardDraw the structure of the monomer or monomers used to synthesize the following polymers, and indicate whether each is a chain-growth polymer or a step-growth polymer.arrow_forwardOrganic chemistry: brief introduction of interfacial polymerization by nylonarrow_forward
- 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.) Explain how this sulfonated polymer can act as a cation exchange resinarrow_forward1 please answer the question correctly. draw the polymer and name the polymerisation process for each case. will give a thumbs up if correct. thank you.arrow_forwardChoose the correct option. Guess the type of polymerization if you are provided with azobisisobutyronitrile and acrylonitrile. a) Free radical polymerizationb) Cationic polymerizationc) Anionic polymerizationd) Condensation polymerizationarrow_forward
- In addition to their use in water treatment, ion-exchange resins are used to extract Au, Ag, and Pt ions from solution. Oneof the most common resins consists of a polymer with abenzene-containing backbone to which sulfonic acid groups(–SO₃H) are then added. (a) What monomer can be used toprepare the polymer backbone? (b) This polymer typically con-tains 4–16% crosslinking. Draw the structure of the benzene-containing monomer used to crosslink the polymer.arrow_forwardDraw the structure of the following polymers and indicate the polymerization type responsible for the givenpolymers.Indicate, where appropriate, the polyester, polyamide or polyurethane linkages.a) Poly(ethene terephthalate)b) Poly(vinyl alcohol)c) Polyisoprene and isomer structures of polyisoprened) Poly(methyl methacrylate)e) Polycaprolactamarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning