Temperature sensitive polymers based on 2-(dimethyl maleinimido)-N-ethyl-acrylamide: Copolymers with N-isopropylacrylamide

Kuckling, Dirk; Adler, Hans-Jürgen P.; Ling, Liansheng; Habicher, Wolf D.; Arndt, Karl‐Friedrich

doi:10.1007/s002890050602

Cited by 33 publications

(47 citation statements)

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“…The second type of particles comprises microgels that are not gelled by monomer chain‐growth gelation but by polymer‐analogous gelation of pre‐polymerized, macromolecular precursor chains in aqueous semidilute solution at c (polymer) = 140 g L −1 . We use pNIPAAm precursors that carry a small percentage of photo‐crosslinkable dimethylmaleimide (DMMI) moieties in random sequence . These chains can be selectively interconnected by light‐induced dimerization of their DMMI moieties .…”

Section: Resultsmentioning

confidence: 99%

The Non‐effect of Polymer‐Network Inhomogeneities in Microgel Volume Phase Transitions: Support for the Mean‐Field Perspective

Habicht

Schmolke

Lange

et al. 2014

Macro Chemistry & Physics

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Thermoresponsive polymer gels exhibit pronounced swelling and deswelling upon changes in temperature, making them attractive for applications in sensing and actuation. This volume phase transition can be discussed in terms of mean‐field theoretical pictures to assess at which conditions it occurs continuously or discontinuously. However, this treatment disregards static nano‐ and micrometer‐scale inhomogeneities in gel polymer networks, which are a common feature of these materials. To check for the impact of such structural complexity, droplet‐based microfluidics are used to fabricate sub‐millimeter‐sized gel particles that exhibit critical compositions at the border between continuous to discontinuous volume phase transitions, along with determined static spatial polymer‐network heterogeneity on the nanometer and micrometer length scales, which is characterized by low‐field NMR. These different microgels are then used to study their swelling and deswelling volume phase transitions from a sub‐millimeter perspective. In this investigation, microgel particles with similar content of crosslinker exhibit similar swelling and deswelling, independent of their extent of static polymer‐network inhomogeneity, in agreement with mean‐field theoretical predictions.

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Section: Resultsmentioning

confidence: 99%

The Non‐effect of Polymer‐Network Inhomogeneities in Microgel Volume Phase Transitions: Support for the Mean‐Field Perspective

Habicht

Schmolke

Lange

et al. 2014

Macro Chemistry & Physics

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“…The uncrosslinked homopolymer of NIPAAm was investigated by GPC with a JASCO instrument equipped with UV and RI detector using Waters 'Ultrastyragel' columns. The samples were measured according to Kuckling et al (2000) against 3,5-di-tert-4butylhydroxytoluene (BHT) standard at 308C in THF containing 0.3 vol% N-methyl acetamide as the mobile phase with a flow rate of 1 mL/min.…”

Section: Hydrogel Materialsmentioning

confidence: 99%

Non-linear Effects in Hydrogel-based Chemical Sensors: Experiment and Modeling

Guenther¹,

Gerlach²,

Wallmersperger

2009

Journal of Intelligent Material Systems and Structures

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Stimuli-responsive' or 'smart' hydrogels are capable of reversibly converting chemical energy into mechanical energy and therefore they are widely used as sensitive materials for chemical sensors. However, non-linear effects such as hysteresis and drift are observed in the swelling behavior of the hydrogels, complicating the calibration procedure for the sensor and affecting the signal reproducibility. In the present work, in order to realize pH and temperature sensors with high signal reproducibility and high long-term stable sensor sensitivity, the complicated kinetics of gel swelling/deswelling processes has been analyzed and the origin of the hysteresis non-linearities has been elucidated.

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“…However, there are relatively few reports of gels being prepared via photo-crosslinking of water-soluble polymers [9,12,13]. In these reports, water-soluble polymers are used as water-developable photo-resists [13], as absorbents for nonionic surfactants with temperature adjustable adsorption properties [12], and for the preparation of LCST polymer systems [8,[14][15][16]. Kuckling et al prepared poly(Nisopropylacrylamide) (PNIPAAm) microgels based on a [2C2]-photocyclo-addition [9].…”

Section: Introductionmentioning

confidence: 98%

Fast, multi-responsive microgels based on photo-crosslinkable poly(2-(dimethylamino)ethyl methacrylate)

Heijl

Prez

2004

Polymer

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Temperature sensitive polymers based on 2-(dimethyl maleinimido)-N-ethyl-acrylamide: Copolymers with N-isopropylacrylamide

Cited by 33 publications

References 0 publications

The Non‐effect of Polymer‐Network Inhomogeneities in Microgel Volume Phase Transitions: Support for the Mean‐Field Perspective

The Non‐effect of Polymer‐Network Inhomogeneities in Microgel Volume Phase Transitions: Support for the Mean‐Field Perspective

Non-linear Effects in Hydrogel-based Chemical Sensors: Experiment and Modeling

Fast, multi-responsive microgels based on photo-crosslinkable poly(2-(dimethylamino)ethyl methacrylate)

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