Why don't cationic and anionic polymerizations terminate by coupling?
termination by coupling is possible in free radical polymerization.
In cationic and anionic, termination by coupling is not possible because in coupling two or more species of same kind having same charge, electron etc. couple.
thus coupling termination is not possible in cationic and anionic, because same charges repel each other.
Why don't cationic and anionic polymerizations terminate by coupling?
5. Tetrahydrofuran is a useful solvent in anionic polymerization but cannot be used in cationic polymerization. Why? Tetrahydrofuran
4. Why is an anionic surfactant more stable at alkaline condition and a cationic surfactant more stable at acid condition? 5. An emulsion of oil in water is more stable towards creaming if the oil particles have small sizes. What is your explaination?
Which polymerization technique (anionic or cationic) would be the best to use for the polymerization of isobutyl vinyl ether?
2. Identify if each monomer would be best for cationic or anionic polymerization, or if it could be used for both. Explain your reasoning with words or pictures. OCH3
Present the reaction mechanisms oftwo possible chain-killing" reactions in the cationic, the anionic, and the radical polymerization of styrene
Present the reaction mechanisms oftwo possible chain-killing" reactions in the cationic, the anionic, and the radical polymerization of styrene ?
2 Identify if each monomer would be best for cationic or anionic polymerization, or if it could he used. for both. Explain your reasoning with words or pictures. CN осн b. .Cr NH
1. Identify if each initiator would be used for cationic, anionic, or coordination polymerization, or none of these. a. b. H2SO4 é o c. NaOEt ZrCl4 3 Ph. | Pho o 4 AICI: С РСуз c-RUS g. PCV, Ph
1.) Structures & preparation for anionic, cationic, nonionic, amphoteric surfactant 2.) What is Co-surfactant and its working principle Please conclude a general method for preparation of each type, but not one by one, for example, the anionic one, please provide one or two methods, but not one method for soap, alkylbenzene sulfonates, alkyl sulfates, alkyl ether sulfates. Thank you.
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