✦ LIBER ✦

The Effect of Polymer Concentration on the Dynamics of Adsorbed Poly(N-isopropylacrylamide) at Particle Surfaces in Water

✍ Scribed by Peng Wei Zhu; Donald H. Napper

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 81 KB
Volume: 214
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.1999.6222

No coin nor oath required. For personal study only.

✦ Synopsis

Results are presented of a light scattering study of the dynamics of absorbed poly(N-isopropylacrylamide) (PNIPAM) chains at the surfaces of poly(N-tert-butylacrylamide) (PNTBA) latex particles using several different feed weight ratios of PNIPAM to latex particles. The adsorbed layer dynamics under the present experimental conditions were postulated to include both the extendedto-loopily adsorbed state transition of tightly adsorbed chains and the diffusion of tenuously adsorbed chains. The dynamics were described by a nonexponential rate process. The relaxation times calculated were found to increase with increasing polymer to latex feed weight ratio. Kinetic constraints were inferred to play a crucial role in controlling the overall dynamics. A higher polymer to latex feed weight ratio was considered to enhance these kinetic constraints.

📜 SIMILAR VOLUMES

The effect of molecular weight on the dy

The effect of molecular weight on the dynamics of adsorbed poly(N-isopropylacrylamide) at particle surfaces in water

✍ Peng Wei Zhu; Donald H. Napper 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 128 KB 👁 2 views

Effects of surfactants on the phase tran

Effects of surfactants on the phase transition of poly(N-isopropylacrylamide) in water

✍ Chi Wu; Shuiqin Zhou 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 706 KB

The effects of both anionic (sodium dodecyl sulfate, SDS) and cationic (dodecylpyridine bromide, DPB) surfactants on the phase transition of narrowly distributed poly(N-isopropylacrylamide) (PNIPAM) microgel particles were investigated by laser light scattering. The addition of SDS swells the partic

The effect of particle concentration of

The effect of particle concentration of poly(p-phenylene) on electrorheological response

✍ Jeong-In Sohn; Jun H. Sung; Hyoung J. Choi; Myung S. Jhon 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 127 KB 👁 2 views

Dynamics of the ion cyclotron resonance

Dynamics of the ion cyclotron resonance effect on amino acids adsorbed at the interfaces

✍ N. Comisso; E. Del Giudice; A. De Ninno; M. Fleischmann; L. Giuliani; G. Mengoli 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 322 KB 👁 2 views

Synthesis and behavior of the polymer co

Synthesis and behavior of the polymer covering on a solid surface. II. Effect of the adsorbent particle size on adsorption

✍ I. Luzinov; I. Evchuk; S. Minko; S. Voronov 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 162 KB 👁 2 views

Adsorption of poly(5-tert-butylperoxy-5-methyl-1-hexen-3-yne-co-maleic anhydride) and poly(styrene-co-maleic anhydride) on the various ultrafine powders (TiO 2 , ZnO, Al 2 O 3 , CaCO 3 , aerosil, and quartz powder) was studied. Plateau adsorption amount per unit surface of adsorbent ( a s ) decrease

Investigation of the effect of type and

Investigation of the effect of type and concentration of ionizable comonomer on the collapse behavior of N-isopropylacrylamide copolymer gels in water

✍ Candan Erbi̇l; Seval Aras; Nurseli̇ Uyanik 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 163 KB 👁 1 views

This work was done to investigate the effect of three different ionizable components (acrylic acid, AA; itaconic acid, IA; maleic acid, MA) on the volume phase transitions and swelling equilibria of thermoshrinking type N-isopropylacrylamide (NIPAAM) gels in water. NIPAAM copolymer gels were synthes