Results 211 to 220 of about 27,905 (245)

Pressure effects on the aggregation of poly(N-isopropylacrylamide) and poly(N-isopropylacrylamide-co-acrylic acid) in aqueous solutions

Macromolecules, 1993
Pressure effects on the phase separation of aqueous solutions of poly(N-isopropylacrylamide) (pNIPA) and poly(N-isopropylacrylamide-co-acrylic acid) (pNIPA/AAc) were examined at pressures up to 250 MPa. The cloud point temperature first increased and then decreased as the pressure was raised.
Katsuto Otake, Ryotaro Karaki, Takeo Ebina, Chiaki Yokoyama, Shinji Takahashi   +4 more
openaire   +1 more source

Properties of Poly(N-isopropylacrylamide)-Grafted Colloidal Silica

Journal of Colloid and Interface Science, 2000
Poly(N-isopropylacrylamide-co-3-trimethoxysilylpropyl methacrylate) was prepared by radical polymerization and was grafted onto the surface of spherical colloidal silica. The copolymer, which had on average 1 silyl group per chain, condensed on the silica dispersed in THF at 60 degrees C. The resulting particles had a critical coagulation concentration
, Liu, , Pelton, , Hrymak
openaire   +2 more sources

Cytotoxic evaluation of N-isopropylacrylamide monomers and temperature-sensitive poly(N-isopropylacrylamide) nanoparticles

Journal of Nanoparticle Research, 2008
The objective of this research project is to investigate the biocompatibility of N-isopropylacrylamide (NIPAAm) monomers and poly(N-isopropylacrylamide) (PNIPAAm) nanoparticles in vitro. PNIPAAm nanoparticles of different sizes were synthesized and characterized by transmission electron microscopy and dynamic light scattering.
Aniket S. Wadajkar, Bhanuprasanth Koppolu, Maham Rahimi, Kytai T. Nguyen   +3 more
openaire   +1 more source

Synthesis and characterization of fluorocarbon‐modified poly(N‐isopropylacrylamide)

Polymer International, 2000
Poly(N-isopropylacrylamide) copolymers (PNIPAMs) containing pendent perfluoroalkyl (R F ) or dodecyl groups have been synthesized by copolymerization of NIPAM with small amounts of R R -acrylates or -methacrylates containing a sulfonamido moiety between the acrylate and R F groups or with dodecyl acrylate. Evidence for strong intermolecular hydrophobic
Yun-xiang Zhang, Qing Fang, Yu-qing Fu, Ai-hua Da, Yubao Zhang, Chi Wu, Thieo E Hogen-Esch   +6 more
openaire   +1 more source

The tuned-morphology studies of the complexes between poly(N-isopropylacrylamide)-b-poly(vinylpyridine) and poly(N-isopropylacrylamide-co-hydroxylethyl methacrylate)-b-poly(vinylphenol)

Journal of Colloid and Interface Science, 2008
Poly(N-isopropylacrylamide)-b-poly(vinylpyridine) (PNIPAAm-b-PVP) and poly(N-isopropylacrylamide-co-hydroxylethyl methacrylate)-b-poly(vinylphenol) (P(NIPAAm-co-HEMA)-b-PVPhol) were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization.
Yong-Yong, Li, Yu, Dai, Xian-Zheng, Zhang, Ren-Xi, Zhuo   +3 more
openaire   +2 more sources

Thermogelation properties of poly(N-isopropylacrylamide) – block – poly(ethylene glycol) – block – poly(N-isopropylacrylamide) triblock copolymer aqueous solutions

Reactive and Functional Polymers, 2010
Abstract Low polydispersity PNIPAM–PEG–PNIPAM triblock copolymers with PEG blocks of 1–6 kDa and PNIPAM chains of 5–30 kDa were synthesized and their thermogelation behavior in aqueous solution as a function of their composition and block length was investigated for the first time. DSC, dynamic rheometry and the tube inverting method were employed to
Mircea Teodorescu, Ioana Negru, Paul O. Stanescu, Constantin Drăghici, Anamaria Lungu, Andrei Sârbu   +5 more
openaire   +1 more source

Vibrational heat capacity of Poly(N-isopropylacrylamide)

Polymer, 2015
Abstract The heat capacity of poly(N-isopropylacrylamide) (PNIPA) has been measured from (1.8–460) K using a quantum design PPMS (Physical Property Measurement System) and differential scanning calorimeters. The low-temperature experimental heat capacity below the glass transition temperature 415 K (141.85 °C) was linked to the vibrational molecular ...
A. Czerniecka-Kubicka, I. Zarzyka, J. Schliesser, B.F. Woodfield, M. Pyda   +4 more
openaire   +1 more source

The electrophoresis of poly( N -isopropylacrylamide) microgel particles

Colloid & Polymer Science, 2000
The electrophoretic mobility of a poly(N-isopropylacrylamide) microgel containing carboxylic groups has been measured as a function of the ionic strength, between 0.1 and 100 mM NaCl, over the temperature range 2545 ∘C. The mobility data obtained have been evaluated using different models, including the porous-sphere, the soft-plate and the soft-sphere
Rasmusson, M, Vincent, B, Marston, N
openaire   +1 more source

Photopolymerization synthesis of poly(N-isopropylacrylamide) hydrogels

Journal of Applied Polymer Science, 1997
Poly(N-isopropylacrylamide) (NIPAAm) gels were formed by photopolymerization of NIPAAm in the absence of a crosslinker using a water solvent at 25°C. Factors affecting formation were the wavelength region of irradiated light, the type of photoinitiators, and the concentrations of the photoinitiator and monomer.
Hitoshi Kubota, Akira Fukuda
openaire   +1 more source

Poly(N-isopropylacrylamide)-based smart hydrogels: Design, properties and applications

Progress in Materials Science, 2021
Ling Wang, Xiao Yang, Yiyu Feng
exaly