Interactions between polystyrene latex spheres and a semiflexible polymer, hydroxypropylcellulose

Russo, Paul S.; Mustafa, Mazidah; Cao, Ting; Stephens, Levi K

doi:10.1016/0021-9797(88)90295-0

Cited by 37 publications

(50 citation statements)

References 33 publications

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“…With the exception of PEG-10,000 (␣ ϭ 10.95), the parameter ␣ seems to remain quite constant. A linear dependence between ␣ and R h was suggested by Russo et al, 41 but Park et al, 42 and Gibbs and Johnson 43 reported ␣ being equal to 3.03 R h 0.59 and 3.2 R h 0.53 , respectively, which is not observed in this study. The parameter is found also to be more or less constant with an average value of 0.74 for these diffusants (Table I).…”

Section: 40 (3) the Hydrodynamic Modelsmentioning

confidence: 42%

Study of the self-diffusion of poly(ethylene glycol)s in poly(vinyl alcohol) aqueous systems

Masaro

Zhu

Macdonald

1999

J. Polym. Sci. B Polym. Phys.

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Section: 40 (3) the Hydrodynamic Modelsmentioning

confidence: 42%

Study of the self-diffusion of poly(ethylene glycol)s in poly(vinyl alcohol) aqueous systems

Masaro

Zhu

Macdonald

1999

J. Polym. Sci. B Polym. Phys.

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“…The presence of zones of strong charge density on the protein surface called "patches" 11,12 produces a local electrostatic attractive force leading to the formation of a primary soluble complex; the length of these patches binding is controlled by the intrinsic polymer chain stiffness. [14][15][16][17][18] The main results, which can be summarized as follows: positive deviation, 15,[19][20][21] negative deviation 24,25,[26][27][28][29][30][31] to the Stokes-Einstein equation (SE), given by D = k B T/6πηR H , have all been reported for various sphere-chain-solvent systems for measurements extending into the semidiluted regime. In general, many studies used the notion of the probe particles that have mostly been considered as spherical interacting with a polymer chain.…”

Section: Introductionmentioning

confidence: 99%

Effect of Small Globular Protein on the Dynamical Behavior of Long‐Chain Polyelectrolyte in Dilute Regime

et al. 2013

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The dynamics of long-chain polyelectrolyte complexed with a globular protein is investigated basing on dynamic light scattering in three phases respecting the pH of medium. In diluted regime, the data are analyzed in the context of multicomponent light scattering theory to treat the pairwise interaction. The adjustment of experimental results with theoretical prediction shows explicit expressions of the interaction parameter k d and diffusion coefficient of complex particle. The second virial coefficient A 2,12 is evaluated and discussed. By dynamic light scattering technique, we suggest an approximation of the number of protein molecules bound per polyelectrolyte chain in each phase. The aggregation process is less prone in the higher ratio, and the patches binding are more favored. C

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“…• C. [13][14][15][16] At room temperature (T ≤ T c ) water is a good solvent to HPC chains and solutions are homogeneous. Above T c hydrophobic interactions are favorable and water becomes a poor solvent for HPC chains.…”

Section: Introductionmentioning

confidence: 99%

“…19 Because of its convenient physical properties and wide accessibility HPC has been used extensively in studies of polymer dynamics. 13,15,18,[20][21][22][23] The polymer has numerous pharmaceutical and food industry applications as it is FDA-approved for food and clinical consumption. 24,25 In particular, HPC polymer is used as a tablet binder 26,27 due to its high cohesiveness, binding strength, hardness, and low friability.…”

Section: Introductionmentioning

confidence: 99%

Spectral time moment analysis of microgel deswelling. Effect of the heating rate

Streletzky¹,

McKenna²

2008

J Polym Sci B Polym Phys

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Microgel nanoparticles were synthesized in aqueous solutions of neutral polymer hydroxypropylcellulose (HPC) through the self-association of amphiphilic HPC molecules and the subsequent cross linking at room temperature. Dynamic Light Scattering was used to study the transport properties of HPC microgels below and above the volume phase transition. Highly nonexponential, multimodal microgel spectra were observed and successfully analyzed by spectral time moment analysis. This article expands earlier results and focuses on the effect of the heating rate on microgel deswelling. During the fast heating two identified microgel modes with apparent hydrodynamic radii (R H ) of 25-30 nm and 400-650 nm collapse into one mode with R H = 100−150 nm. This indicates the shrinkage of microgel size distribution and an apparent decrease in the radius of larger microgels. During the slow heating, however, both microgel-identified modes remain present above T c . Although equally represented below the transition, the dominance of larger microgels' mode increases almost two fold with rising temperature above 40• C. Moreover, R H for this mode increases from 250-300 nm to about 800-850 nm with a multi-step temperature change from 40 to 42.5• C, indicating the growth (and not shrinkage) of microgels. The second mode is represented by the temperature independent R H , but its contribution goes down from about 50% to less than 10%.

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Interactions between polystyrene latex spheres and a semiflexible polymer, hydroxypropylcellulose

Cited by 37 publications

References 33 publications

Study of the self-diffusion of poly(ethylene glycol)s in poly(vinyl alcohol) aqueous systems

Study of the self-diffusion of poly(ethylene glycol)s in poly(vinyl alcohol) aqueous systems

Effect of Small Globular Protein on the Dynamical Behavior of Long‐Chain Polyelectrolyte in Dilute Regime

Spectral time moment analysis of microgel deswelling. Effect of the heating rate

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