The gelation of aqueous solutions of polymethacrylic acid☆

Eliassaf, Jehudah; Silberberg, A.

doi:10.1016/0032-3861(62)90103-9

Cited by 76 publications

(37 citation statements)

References 4 publications

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“…The cloud point of poly(MAA‐ co ‐PEGMA300) copolymers drops rapidly, as the PEGMA300 content is increased from 1 to 5 mol %. The phase separation temperature reported for PMAA homopolymer (˜80 °C)29 is consistent with the data in Figure 8. Copolymers in the range of ˜6–24 mol % PEGMA300 are insoluble in water at any temperature, and the cloud point then increases steadily for polymers with 25–100 mol % PEGMA300.…”

Section: Resultssupporting

confidence: 88%

“…The cloud point for a 3 wt % solution of poly(PEGMA300) in distilled water is observed at 60.8 °C, reasonably close to the 54.5 °C (3 wt %) reported previously for this polymer 28. Poly(MAA) has been reported to undergo a thermally induced phase separation that is dependent on the polymer concentration,29 and from this report, the phase separation temperature for a 3% poly(MAA) solution can be estimated to be about 80 °C. As shown in Figure 8, the cloud points for the copolymers of these two monomers are lower than those of the homopolymers for almost all compositions, because of the hydrogen bonding between acid and ether units.…”

Section: Resultssupporting

confidence: 85%

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Thermoresponsive copolymers of methacrylic acid and poly(ethylene glycol) methyl ether methacrylate

Jones

Novo

Flagler

et al. 2005

J. Polym. Sci. A Polym. Chem.

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Copolymers of methacrylic acid (MAA) and poly(ethylene glycol) methyl ether methacrylate (PEGMA) were prepared and their cloud points in aqueous solution were studied as a function of comonomer ratio, solution pH, and presence of hydrophobic comonomers. Under acidic conditions, the cloud point falls below 0 °C for copolymers with between 25% to 60% ether content, because of the formation of hydrophobic H‐bonded ether–acid complexes. The cloud point also decreases with solution pH. For equivalent ether to acid ratios, the cloud point decreases with decreasing PEG chain length, because of the presence of a larger number of hydrophobic methyl and methacrylate groups. Similarly, the cloud point decreases upon incorporation of hydrophobic comonomers such as butyl, lauryl, or glycidyl methacrylates. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 6095–6104, 2005

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 85%

Thermoresponsive copolymers of methacrylic acid and poly(ethylene glycol) methyl ether methacrylate

Jones

Novo

Flagler

et al. 2005

J. Polym. Sci. A Polym. Chem.

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“…Such solutions gel on heating because an increase in temperature decreases the solubility. There are a few rare examples of systems that gel on heating such as aqueous solutions of polymethacrylic acid [155] and cellulose derivatives [156,157]. The respective phase diagrams for such systems are similar to those for regular systems (Fig.…”

Section: Introductionmentioning

confidence: 81%

Physical Processes

Vyazovkin

2015

Isoconversional Kinetics of Thermally Stimulated Processes

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“…It must be noted that in the aforementioned examples, MAA was used rather than AA as the H-donor moiety. However, the methyl substituent of MAA can favor hydrophobic interactions and the aqueous solutions show a more complex behavior as assessed by a cloud-point [8]. Moreover, the possible role of the architecture of the copolymers on self-association has not been investigated extensively.…”

Section: Introductionmentioning

confidence: 99%

Self-association of double-hydrophilic copolymers of acrylic acid and poly(ethylene oxide) macromonomer

Khousakoun

Gohy

Jérôme

2004

Polymer

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Poly(ethylene oxide) (PEO) end-capped by a methacrylate unsaturation was copolymerized with acrylic acid by RAFT with dibenzyltrithiocarbonate as a chain transfer agent. Tapered triblock copolymers consisting of a poly(acrylic acid) (PAA) inner block and comb-like outer blocks of PEO macromomers were formed as result of the comonomers reactivity ratios. Composition of these copolymers and length of the PEO branches were varied. Dynamic light scattering (DLS) was used to characterize the aggregates formed in water and to investigate their response to stimuli, such as pH, temperature and ionic strength. In parallel, the morphology of the aggregates was directly observed by transmission electron microscopy (TEM). Well-defined aggregates were formed in the 5 8 as consequence of the complete ionization of the PAA block.

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The gelation of aqueous solutions of polymethacrylic acid☆

Cited by 76 publications

References 4 publications

Thermoresponsive copolymers of methacrylic acid and poly(ethylene glycol) methyl ether methacrylate

Thermoresponsive copolymers of methacrylic acid and poly(ethylene glycol) methyl ether methacrylate

Physical Processes

Self-association of double-hydrophilic copolymers of acrylic acid and poly(ethylene oxide) macromonomer

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