The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.
Synthesis of Thermally Sensitive Water-Soluble Polymethacrylates by Living Anionic Polymerizations of Oligo(ethylene glycol) Methyl Ether Methacrylates
Abstract
Anionic polymerizations of 2-methoxyethyl methacrylate ( 1 ), 2-(2-methoxyethoxy)ethyl methacrylate ( 2 ), and 2-[2-(2-methoxyethoxy)ethoxy]ethyl methacrylate ( 3 ) were carried out with 1,1-diphenyl-3-methylpentyllithium/lithium chloride and diphenylmethylpotassium/diethylzinc in THF at −78 °C for 2−4 h. The resulting polymers possessed the predicted molecular weights based on the molar ratios between monomers to initiators and the narrow molecular weight distributions ( M w / M n < 1.1). The stability of the propagating chain ends of poly( 2 ) and poly( 3 ) was confirmed by the quantitative efficiency in the reversible sequential block copolymerizations between 2 and 3 . New block copolymers having well-defined chain structures, poly( 2 )- block -poly( 3 ), poly( 3 )- block -poly( 2 ), polystyrene- block -poly( 1 ), polystyrene- block -poly( 2 ), and polystyrene- block -poly( 3 ), were anionically synthesized. Both the solubility and the cloud point of polymers strongly depended on the length of hydrophilic oligo(ethylene glycol) unit. Poly( 2 ) and poly( 3 ) with longer oligo(ethylene glycol) chains were readily soluble in water, whereas poly( 1 ) was insoluble in water. The aqueous solutions of poly( 2 ) and poly( 3 ) showed the reversible cloud points at 26 and 52 °C, respectively.
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Cited by
New directions in thermoresponsive polymers
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Metadata
- Authors
- Han, S., Hagiwara, M., & Ishizone, T.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-10-04
- Volume
- 36
- Issue
- 22
- Pages
- 8312-8319
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2050186721
- Cited by
- 451
- References
- 21
- FWCI
- 3.76
- Type
- journal article
- Language
- en
- Open access
- closed
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