Note on the Relation between the Parameters of the Mark-Houwink-Kuhn-Sakurada Equation

Halabalová, Věra; Šimek, Lubomı́r; Dostál, Jiřı́; Bohdanecký, M.

doi:10.1080/10236660490890484

Cited by 19 publications

(14 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using a double log plot of the intrinsic viscosity [ η ] versus M w (Equation (4)), it was possible to determine the average conformation of the polymer in solution for each polymer sample ( α ) [ 30 ]. From the Mark-Houwink plot analysis, it was shown that the curves of all the native and hydrolyzed polysaccharide samples had two or more deflections along the molecular weight distribution, and therefore, more than one α value was determined (see Figure 4 a–d).…”

Section: Resultsmentioning

confidence: 99%

“…All the samples were also analyzed for their conformational properties in solution using the Mark-Houwink-Sakurada equation, which describes the relationship between the intrinsic viscosity ([ η ]) and M w . The specific parameters K and α, which are related to the intercept and the slope of the plot, respectively, were obtained by plotting the M W against the intrinsic viscosity [ η ] on a double logarithmic graph [ 30 ].…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Partial Acid Hydrolysis on Size, Dispersity, Monosaccharide Composition, and Conformation of Linearly-Branched Water-Soluble Polysaccharides

2020

View full text Add to dashboard Cite

The effect of partial acid hydrolysis on the physical and chemical properties of galactomannan, arabinoxylan, and xyloglucan was investigated. Polysaccharides were treated at 50 °C with hydrochloric acid for 3–48 h. Portions of isopropanol (i-PrOH) were added sequentially to the hydrolyzates, resulting in fractions that were collected by centrifugation. As expected, a significant reduction of weight-average molecular weight (Mw) was observed with increasing hydrolysis time. Fractional precipitation was successfully applied to collect at least one polymer fraction with dispersity (Đ) close to one for each polysaccharide. The monosaccharide composition analysis showed that the partial hydrolysis usually lowered the relative amount of side chains, with the exception of galactomannan, where the composition remained largely unaffected. Estimation of the polymer conformation in solution, through evaluation of the Mark-Houwink parameter coefficient (α), confirmed that acid hydrolysis influenced the polysaccharides’ conformation. It was demonstrated that acid treatment in dilute solution followed by fractional isopropanol precipitation is a method, extendible to a variety of polysaccharides, to obtain materials of decreased molecular weight and low dispersity with slightly altered overall composition and conformation.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Influence of Partial Acid Hydrolysis on Size, Dispersity, Monosaccharide Composition, and Conformation of Linearly-Branched Water-Soluble Polysaccharides

2020

View full text Add to dashboard Cite

show abstract

“…A good exposition of related issues and extended analysis and discussion in an effort to explain this problem, although not specifically for DNA, can be found in Ref. 10.…”

Section: Mark-houwink Constant Interdependencymentioning

confidence: 99%

“…Since the discovery of the DNA structure, biologists became interested, among other things, in finding a convenient and reliable way of calculating the molecular weight of various, extremely long, fragments isolated from different organisms, for example, bacteriophages, when molecular biology was still at its infancy. Using the semiempirical Mark-Houwink equation, [5][6][7][8][9][10] or slightly modified ver-…”

Section: Introductionmentioning

confidence: 99%

The intrinsic viscosity of linear DNA

2011

View full text Add to dashboard Cite

We measured the intrinsic viscosity of very small synthetic DNA molecules, of 20-395 base pairs, and incorporated them in a nearly complete picture for the whole span of molecular weights reported in the literature to date. A major transition is observed at M approximately 2 × 10(6) . It is found that in the range of approximately 7 × 10(3) ≤ M ≤ 2 × 10(6) , the intrinsic viscosity scales as [η] approximately M(1.05) , suggesting that short DNA chains are not as rigid as generally thought. The corresponding scaling for the range of 2 × 10(6) ≤ M ≤ 8 × 10(10) is [η] approximately M(0.69) . A comparison of our results with existing equations, for much narrower data distributions, is made, and the agreement is very satisfactory considering the huge range of data analyzed here. Experimental concerns such as the effect of ionic strength, polydispersity, temperature, and shear rate are discussed in detail. Some issues concerning the Huggins coefficient, polymer chain stiffness, and the relationship between the Mark-Houwink constants K, α are also presented; it is found that log K = 1.156 - 6.19α.

show abstract

“…The relationship between [η] and M w follows the well-known Mark-Houwink equation [64,65] and the power exponent (α) reflects conformation of polymer chains in solution. As polymer chains change from random coils in θ-solvent to worm-or rod-like rigid conformations, α increases from 0.5 to above 0.8 and generally lies in the range of 0.5-0.8 for flexible chains in dilute solution [66].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and solution property of acrylamide-sulfobetaine copolymers

Song

Zheng

2014

Colloid Polym Sci

View full text Add to dashboard Cite

A b s t r a c t S u l f o b e t a i n e 3 -[ N , N -d i m e t h y l -N -( 2 -methacryloxylethyl)ammonio]-propane sulfonate (DMAPS) was used to copolymerize with acrylamide (AM) to prepare salt-sensitive copolymers. The optimal reaction conditions, such as initiator concentration, temperature, and reaction time, to achieve the largest weight averaged molecular weight (M w ) and the lowest polydispersity index (PDI) were studied. The reactivity ratios of AM and DMAPS (r 1 , r 2 ) were calculated to be (0.45, 0.84) by the Fineman-Ross method, and (0.47, 0.91) by the Kelen-Tüdös method. The Q-e values of DMAPS were calculated to be (0.30, −0.38). DMAPS was found to be more easily to add into the copolymer than AM to form random copolymers with a slight alternating tendency. Solution rheology and molecular size of the copolymers as a function of M w were studied in 1 M NaCl solution, a near θ-solution, by rotational rheometer and light scattering methods, respectively. Undisturbed dimension of the copolymers was evaluated according to Stockmayer-Fixman relation.

show abstract

Note on the Relation between the Parameters of the Mark-Houwink-Kuhn-Sakurada Equation

Cited by 19 publications

References 19 publications

Influence of Partial Acid Hydrolysis on Size, Dispersity, Monosaccharide Composition, and Conformation of Linearly-Branched Water-Soluble Polysaccharides

Influence of Partial Acid Hydrolysis on Size, Dispersity, Monosaccharide Composition, and Conformation of Linearly-Branched Water-Soluble Polysaccharides

The intrinsic viscosity of linear DNA

Synthesis and solution property of acrylamide-sulfobetaine copolymers

Contact Info

Product

Resources

About