Regulation of temperature‐response swelling behavior of interpenetrating polymer networks composed of hydrogen bonding polymers

Sasase, Hiroyuki; Aoki, Takashi; Katono, Hiroki; Sanui, Kohei; Ogata, Naoya; Ohta, Ryuki; Kondo, Tamotsu; Okano, Teruo; Sakurai, Yasuhisa

doi:10.1002/marc.1992.030131208

Cited by 47 publications

(24 citation statements)

References 9 publications

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“…PNAGA synthesized by free‐radical polymerization shows a UCST in water, as determined by turbidimetry (Figure 4). PNAGA has already been shown to build interpolymer complexes with PAAc via hydrogen bonding 18. The glycinamide moiety of PNAGA can act both as a hydrogen donor (mainly primary amide) and acceptor (carbonyl groups).…”

Section: Resultsmentioning

confidence: 99%

Non‐Ionic Homo‐ and Copolymers with H‐Donor and H‐Acceptor Units with an UCST in Water

Seuring

Agarwal

2010

Macro Chemistry & Physics

143

162

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A well‐studied example of a thermoresponsive polymer is PNiPAAm, which exhibits a sharp coil‐to‐globule transition in water at its LCST. A study relating to the missing counterpart of LCST polymers is presented: N‐acryloylglycinamide (NAGA) homopolymer and copolymers from NAGA and N‐acetylacrylamide (NAcAAm) that show a sharp UCST (where the sharpness depends on the composition). The polymers were synthesized by free‐radical copolymerization and the copolymerization parameters were determined by the method of Kelen‐Tüdös. The UCST was investigated by turbidimetry, regarding the influence of the copolymer composition, the polymer concentration and the addition of electrolytes. magnified image

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Section: Resultsmentioning

confidence: 99%

Non‐Ionic Homo‐ and Copolymers with H‐Donor and H‐Acceptor Units with an UCST in Water

Seuring

Agarwal

2010

Macro Chemistry & Physics

143

162

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“…The reason exists in two aspects as follows: 1) the hydrophobic monomer BMA contributes to the mechanical properties of the IPNs, and 2) the hydrophobic interactions stabilize the hydrogen bonding complexation of the IPNs. [38,40] As shown in Figure 5, in the second step for fabricating poly(AAM-co-BMA) shell on the seed core, hydrophobic monomer BMA and hydrophilic monomer AAM had ªequal chanceº to participate in the freeradical copolymerization reaction. Consequently, a certain amount of hydrophobic polymer was randomly distributed in the prepared poly(AAM-co-BMA) shell layer, and therefore in the resulted IPN shell layer.…”

Section: Full Papermentioning

confidence: 99%

Positively Thermo‐Sensitive Monodisperse Core–Shell Microspheres

Xiao

Chu²,

Chen

et al. 2003

Adv Funct Materials

116

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In this paper, we report on a novel family of monodisperse thermo‐sensitive core–shell hydrogel microspheres that is featured with high monodispersity and positively thermo‐responsive volume phase transition characteristics with tunable swelling kinetics, i.e., the particle swelling is induced by an increase rather than a decrease in temperature. The microspheres were fabricated in a three‐step process. In the first step, monodisperse poly(acrylamide‐co‐styrene) seeds were prepared by emulsifier‐free emulsion polymerization. In the second step, poly(acrylamide) or poly[acrylamide‐co‐(butyl methacrylate)] shells were fabricated on the microsphere seeds by free radical polymerization. In the third step, the core–shell microspheres with poly‐ (acrylamide)/poly(acrylic acid) based interpenetrating polymer network (IPN) shells were finished by a method of sequential IPN synthesis. The proposed monodisperse core–shell microspheres provide a new mode of the phase transition behavior for thermo‐sensitive “smart” or “intelligent” monodisperse micro‐actuators that is highly attractive for targeting drug delivery systems, chemical separations, sensors, and so on.

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“…To clearly show the zipper effect of these polymers, the temperature dependence of the light transmittance of PAA in heavy water and PAAM in heavy water is also shown in Figure 2. As well as in water, [10] the single polymer solutions do not show phase separation behavior in the whole temperature range.…”

Section: Experimental Partmentioning

confidence: 99%

Deuterium Isotope Effect on the Phase Separation of Zipper-Type Hydrogen-Bonding Inter-Polymer Complexes in Solution

Endo

Shirota

Horie

2001

Macromol. Rapid Commun.

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Regulation of temperature‐response swelling behavior of interpenetrating polymer networks composed of hydrogen bonding polymers

Cited by 47 publications

References 9 publications

Non‐Ionic Homo‐ and Copolymers with H‐Donor and H‐Acceptor Units with an UCST in Water

Non‐Ionic Homo‐ and Copolymers with H‐Donor and H‐Acceptor Units with an UCST in Water

Positively Thermo‐Sensitive Monodisperse Core–Shell Microspheres

Deuterium Isotope Effect on the Phase Separation of Zipper-Type Hydrogen-Bonding Inter-Polymer Complexes in Solution

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