Preparation of a diblock copolymer of isobutyl vinyl ether and 2‐methyl‐2‐oxazoline

Seung, S. L. N.; Young, R. N.

doi:10.1002/pol.1979.130170410

Cited by 16 publications

(2 citation statements)

References 12 publications

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“…For comparison, copolymer 4 has been prepared according to the literature method in which molecular iodine was used as initiator. 6 The polymerization of 2oxazoline was induced by an iodomethyl group of 2, which Figures 1 and 2 show and 13C NMR spectra of block copolymers 4 and 7, respectively. The peak c in Figure IB is due to the methyne proton of polylvinyl ether) adjacent to poly(¿V-acylalkylenimine), and the corresponding peak is not detected in Figure 1A.…”

Section: Resultsmentioning

confidence: 99%

Block copolymerization of vinyl ether with cyclic imino ether: synthesis of a new cleavable, nonionic polymer surfactant

Kobayashi¹,

Uyama²,

Liu³

et al. 1990

Macromolecules

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Block copolymers from vinyl ether and cyclic imino ether monomers were synthesized by successive cationic copolymerization of each monomer in a one-pot procedure. The resulting copolymers had a hydrophobic polylvinyl ether) segment and a hydrophilic poly(JV-acylalkylenimine) segment from the cyclic imino ether. Vinyl ethers used for construction of a hydrophobic segment are n-butyl, ¿-octyl, and n-cetyl vinyl ethers. Cyclic imino ethers used for construction of a hydrophilic segment are 2-methyl-and 2-ethyl-2-oxazolines and 2-methyl-5,6-dihydro-4H-l,3-oxazine. These block copolymers exhibit good surface activities and, hence, are a family of nonionic polymer surfactants. The surface activities reflected by the surface tension ( ) in water were high. The lowest value reached 27.6 dyn/cm for the copolymer from n-butyl vinyl ether/ 2-methyl-2-oxazoline. The C-N bond between the polylvinyl ether) segment and poly(TV-acylalkylenimine) segment was readily cleaved under acidic conditions to give a mixture of both homopolymers having no surface activities.was formed by the reaction of iodine with a vinyl ether at the initiation stage.

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Section: Resultsmentioning

confidence: 99%

Block copolymerization of vinyl ether with cyclic imino ether: synthesis of a new cleavable, nonionic polymer surfactant

Kobayashi¹,

Uyama²,

Liu³

et al. 1990

Macromolecules

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show abstract

“…Besides this, the synthesis of block copolymers of aromatic vinyl compounds and MOx was carried out by Morishima et al 40 in four steps by a combination of anionic polymerization, chain-end transformation, halogen exchange, and then CROP of MOx. Seung and Young [41][42][43] obtained block copolymers by CROP of MOx using polymers bearing iodine end chain as macroinitiator. These macroinitiators were prepared by polymerizing either styrene or styrene oxide or isobutyl vinyl ether with iodine initiator.…”

Section: Introductionmentioning

confidence: 99%