Efficient synthesis of sterically stabilized pH-responsive microgels of controllable particle diameter by emulsion polymerization

Langmuir

Volumn 22, Issue 7, 2006, Pages 3381-3387

  Dupin, Damien ^a   Fujii, Syuji ^a   Armes, Steven P ^a   Reeve, Paul ^b   Baxter, Steven M ^b  

^a UNIVERSITY OF SHEFFIELD   (United Kingdom)

^b ROHM AND HAAS COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACID TITRATION; CATIONIC MICROGEL; DIVINYLBENZENE (DVB); HYDROPHILIC MACROMONOMER; NEAR-MONODISPERSE SPHERICAL MORPHOLOGIES; PHOTOSEDIMENTOMETRY; STERICALLY STABILIZED PH-RESPONSIVE MICROGELS; SURFACTANT CONCENTRATIONS;

BENZENE; CONCENTRATION (PROCESS); ELECTROPHORESIS; EMULSION POLYMERIZATION; LATEXES; LIGHT SCATTERING; MONOMERS; MORPHOLOGY; NUCLEAR MAGNETIC RESONANCE; PH EFFECTS; SCANNING ELECTRON MICROSCOPY; SWELLING; SYNTHESIS (CHEMICAL); VINYL RESINS;

GELS;

EID: 33645509526     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la053258h     Document Type: Article

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36. 18 comprised only 55 mol % of the bifunctional 1,4-substituted isomer, and these authors took this purity into account when calculating their target degrees of cross-linking. In contrast, the DVB grade used in the present study comprised 80 mol % DVB; thus, a nominal target degree of cross-linking of 1.0% gives an actual degree of cross-linking of 0.8% (assuming complete incorporation of the DVB comonomer within the latex). It is emphasized that these differences are irrelevant to our comparison of the acid-induced swelling kinetics in Figure 9 since the same DVB grade was used at the same target degree of cross-linking (i.e., a 1.0% nominal degree of cross-linking but 0.8% actual degree of cross-linking based on the DVB purity) for the sterically stabilized, the charge-stabilized, and the surfactant-stabilized P2VP particles (see entries 1, 15, and 16 in Table 1).