Molecular Weight Characterization of Conjugated Polymers Through Gel Permeation Chromatography and Static Light Scattering

2021 ◽  
Author(s):  
Ryan A. Fair ◽  
Renxuan Xie ◽  
Youngmin Lee ◽  
Ralph H. Colby ◽  
Enrique D. Gomez
Keyword(s):  
Molecular Weight ◽  
Light Scattering ◽  
Conjugated Polymers ◽  
Gel Permeation Chromatography ◽  
Static Light Scattering ◽  
Gel Permeation

scholarly journals Chromatographic characterization of products isolated from chrome shavings

1999 ◽  
Vol 42 (3) ◽  
pp. 281-290
Author(s):  
Edivaldo E Garcia ◽  
Cláudia C.M Kimura ◽  
Ariovaldo C Martins ◽  
Gisele O Rocha ◽  
Jorge Nozaki
Keyword(s):  
Amino Acids ◽  
Molecular Weight ◽  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Chemical Characterization ◽  
Gel Permeation Chromatography ◽  
Gel Permeation ◽  
Chromatographic Characterization ◽  
Free Aminoacids

Gel permeation chromatography and high performance liquid chromatography were employed for separation and chemical characterization of products isolated from chrome shavings. After enzymatic hydrolysis, the products isolated were peptides of higher molecular weight. Peptides of lower molecular weight and free aminoacids were the main products using sulfuric acid in chrome shavings solubilization. Glycine (17%) , glutamic acid (10.6%) , alanine (9.2%) , and arginine (8.2%) were the principal amino acids found. Phenylalanine(1.8%) was the main aromatic amino acid , while tryptophane was completely absent.

The effect of heterogeneity in composition on the determination of molecular weight distribution of block copolymers by gel permeation chromatography

1969 ◽  
Vol 22 (3) ◽  
pp. 543 ◽  
Author(s):  
JR Urwin ◽  
DN Cramond
Keyword(s):  
Molecular Weight ◽  
Light Scattering ◽  
Block Copolymers ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Gel Permeation Chromatography ◽  
Scattering Data ◽  
Gel Permeation

The molecular weight of samples of block copolymers of poly(isoprene : styrene) determined by gel permeation chromatography (g.p.c.) are found to deviate from the values obtained by light scattering and osmometry. The extent of the deviation depends on composition, and comparision of (g.p.c.) values with osmometry (MN) can be interpreted if account is taken of the effect of heterogeneity. The drift in composition with molecular weight calculated from light scattering data can be used to predict the direction of the deviation, at least qualitatively.

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