Poly swelling behavior

The swelling behavior of poly(N-isopropylacrylamide) has been studied extensively [18,19]. It has been shown that this gel has a lower critical point due to the hydrophobic interaction. Such a swelling curve is schematically illustrated in Fig. 9. The gel is swollen at a lower temperature and collapses at a higher temperature if the sample gel is allowed to swell freely in water. The volume of the gel changes discontinuously at 33.6°C. The swelling curves obtained in this way correspond to the isobar at zero osmotic pressure. On the other hand, the friction coefficient is measured along the isochore, which is given in Fig. 9,... 

Temperature dependent swelling behavior of the poly(AAm-BMA) gel consisting 10% BMA (Initial gel), PAAc gel (secondary gel) and IPNs composed of poly(AAm-co-BMA-10) with PAAc are shown in Fig. 11 and compared with a corresponding random copolymer gel. The IPNs and random gels show... 

Hegewald J, Schmidt T, Eichhom KJ, Kretschmer K, Kuckling D, Arndt KF (2006) Electron beam irradiation of poly(vinyl methyl ether) films. 2. temperature-dependent swelling behavior. Langmuir 22(11) 5152—5159... 

Takeda M, Norisuye T, Shibayama M (2000) Critical dynamics of cross-linked polymer chains near the gelation threshold. Macromolecules 33 2909-2915 Te Nijenhuis K (1997a) Thermoreversible networks. Introduction. Adv Polym Sci 130 1-12 Te Nijenhuis K (1997b) Thermoreversible networks. Gelatin. Adv Polym Sci 130 160-193 Theiss D, Schmidt T, Dorschner H, Reichelt R, Arndt K-F (2005) Filled temperature-sensitive poly(vinyl methyl ether) hydrogels. J Appl Polym Sci 98 2253-2265 Toomey R, Freidank D, Riihe J (2004) Swelling behavior of thin, surface-attached polymer networks. Macromolecules 37 882-887... 

Yoshioka H, Mikami M, Mori Y, Tsuchida E (1993) Preparation of thermoresponsive surfaces using polyvinylchloride-graft-poly(A-isopropylacrylamide). Polym Adv Technol 4 519-521 Yu H, Grainger DW (1993) Thermosensitive swelling behavior in cross.linked N-isopropylacry-lamide networks-cationic, anionic, and ampholytic hydrogels. J Appl Polym Sci 49 1553-1563... 

Kuckling D, Richter A, Amdt K-F (2003a) Temperature and pH dependent swelling behavior of poly(A-isopropyl-acrylamide)-copolymer hydrogels and their use in flow control. Macromol Mater Eng 288 144-151... 

M.B. Huglin, Y. Liu and J.L. Velada, Thermoreversible swelling behavior of hydrogels based on /V-isopropylacrylamide with acidic comonomers, Polymer, 1997, 38, 5785 M.K. Yoo, Y.K. Sung, C.S. Cho and Y.M. Lee, Effect of polymer complex formation on the cloud-point of poly(JV-isopropylacrylamide) (PNIPAAm) in the poly(NIPAAm-co-acrylic acid) polyelectrolyte complex between poly(acrylic acid) and poly(ally-lamine), Polym., 1997, 38, 2759. 

Lee, S.B., Park, E.K., Lim, Y.M. et al. 2006. Preparation of alginate/poly(N-isopropylacrylamide) semi-inteipenetrating and fully interpenetrating polymer network hydrogels with y-ray irradiation and their swelling behaviors. JAppl Polym Sci. 100 4439 446. 

Fig. 17 Swelling induced detachment of carboxylated poly(OEGMA-r-HEMA) brash anchored to a QCM chip via Au-S bond. The swelling behavior depends on the ionic strength and pH of the solution. The polyelectrolyte brash detaches from the substrate beyond a critical wet thickness...

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