Determination of molar mass and solution properties of cationic hydroxyethyl cellulose derivatives by multi-angle laser light scattering with simultaneous refractive index detection

2009 ◽  
Vol 58 (10) ◽  
pp. 1115-1119 ◽  
Author(s):  
Wei Gao ◽  
X Michael Liu ◽  
Richard A Gross
Keyword(s):  
Refractive Index ◽  
Light Scattering ◽  
Molar Mass ◽  
Laser Light ◽  
Laser Light Scattering ◽  
Hydroxyethyl Cellulose ◽  
Cellulose Derivatives ◽  
Solution Properties ◽  
Refractive Index Detection

scholarly journals Specific refractive index increments of inulin

2001 ◽  
Vol 66 (6) ◽  
pp. 397-401 ◽  
Author(s):  
Goran Nikolic ◽  
Milorad Cakic ◽  
Ljubomir Ilic
Keyword(s):  
Refractive Index ◽  
Light Scattering ◽  
Approximate Method ◽  
Virial Coefficient ◽  
Molar Mass ◽  
Laser Light ◽  
Second Virial Coefficient ◽  
Laser Light Scattering ◽  
Operating Wavelength ◽  
Differential Refractometer

The specific refractive index increments (dn/dc) of inulin in water, at 25 ?C, were measured at different wavelengths (436, 546 and 589 nm) using a BP-differential refractometer. The dn/dc at the operating wavelength (633 nm) of the laser light scattering photometer was calculated by an approximate method. This value can be used to determine the absolute molar mass and the second virial coefficient of inulin by light scattering photometry.

scholarly journals Determination of the absolute molar mass of acetylated eucalyptus kraft lignin by two types of size-exclusion chromatography combined with multi-angle laser light-scattering detectors

Holzforschung ◽  
2019 ◽  
Vol 73 (4) ◽  
pp. 363-369 ◽  
Author(s):  
Linping Wang ◽  
Yasumitsu Uraki ◽  
Keiichi Koda ◽  
Aori Gele ◽  
Xuesong Zhou ◽  
...  
Keyword(s):  
Light Scattering ◽  
Size Exclusion Chromatography ◽  
Molar Mass ◽  
Laser Light ◽  
Kraft Lignin ◽  
Laser Light Scattering ◽  
Size Exclusion ◽  
Compact Structure ◽  
Exclusion Chromatography

AbstractThe molar mass (MM) and polydispersity indices (PDI) of acetylated hardwood kraft lignin (Ac-HWKL) and Ac-HWKL fractions were measured by size-exclusion chromatography with multi-angle laser light scattering (SEC-MALLS). The detectors worked at LL658 nmand LL785 nm. The MM of Ac-HWKL measured at 785 nm was much smaller than that measured at 658 nm. The number-average (Mn) and weight-average (Mw) molar masses of Ac-HWKL determined at 785 nm were approximately 6.2 and 6.5 times larger, respectively, than the values estimated using a conventional calibration curve created with authentic polystyrene standards in tetrahydrofuran (THF). Based on the Mw of Ac-HWKL fractions, the Mark-Houwink-Sakurada equation for Ac-HWKL was established to be [η]/ml g−1=0.320 M0.24in THF and [η]/ml g−1=0.142 M0.26in dimethyl sulfoxide (DMSO). These results demonstrate that Ac-HWKL has a more compact structure in an organic solvent than polystyrene.

Laser Light Scattering Studies of Soluble High-Performance Polyimides:  Solution Properties and Molar Mass Distributions

1996 ◽  
Vol 29 (23) ◽  
pp. 7426-7431 ◽  
Author(s):  
Mohammad Siddiq ◽  
Huizhen Hu ◽  
Mongxian Ding ◽  
Baozhang Li ◽  
Chi Wu
Keyword(s):  
Light Scattering ◽  
High Performance ◽  
Molar Mass ◽  
Laser Light ◽  
Laser Light Scattering ◽  
Solution Properties ◽  
Mass Distributions

A Progress in Development and Application of Size Exclusion Chromatograph/Multi-Angle Laser Light Scattering

2014 ◽  
Vol 936 ◽  
pp. 1597-1602
Author(s):  
Xue Yang ◽  
Ze Quan Liu ◽  
Qiang Zhang
Keyword(s):  
Molecular Weight ◽  
Light Scattering ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Laser Light ◽  
Laser Light Scattering ◽  
Size Exclusion

This paper reveals the development and significance of size exclusion chromatograph/multi-angle laser light scattering(SEC-MALLS) for determination of the molecular weight and characterization of the molecular weight distribution. This technque has been applied in many aspects, such as biology, polymer and carboxylate surfactant. It has made a big contribution to study the property of macromolecular substances.

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