Spectrophotometric determination of the styrene content of alpha-methylstyrene — styrene copolymers

1988 ◽  
Vol 20 (6) ◽  
pp. 543-548 ◽  
Author(s):  
Bluma Guenther Scares ◽  
Ailton de Souza Gomes
Keyword(s):  
Spectrophotometric Determination ◽  
Styrene Copolymers ◽  
Styrene Content

Spectrophotometric Determination of the Styrene Content of Butadiene-Styrene Copolymers

1946 ◽  
Vol 19 (4) ◽  
pp. 1077-1084 ◽  
Author(s):  
E. J. Meehan
Keyword(s):  
Molecular Weight ◽  
Spectrophotometric Determination ◽  
Extinction Coefficient ◽  
Ultraviolet Spectrophotometry ◽  
Relative Precision ◽  
Specific Extinction Coefficient ◽  
Styrene Copolymers ◽  
Styrene Content ◽  
Butadiene Styrene

Abstract The ultraviolet absorption of polystyrene, with maximum absorption at 262 mµ, is due to the presence of phenyl residues in the polymer. The specific extinction coefficient is constant, i.e., independent of the molecular weight of the polymer. This shows that the extinction of the phenyl residues is additive. On the basis of this fact, it is shown that the styrene content of a butadiene-styrene copolymer (such as GR-S rubber) can be determined by ultraviolet spectrophotometry. The relative precision of the determination is about 1 per cent, the probable relative accuracy is about 3 per cent.

Spectrophotometric Determination of Total Cr in Water

2018 ◽  
Author(s):  
Xhulieta Hamiti ◽  
Ilirjana Boci ◽  
Pranvera Lazo
Keyword(s):  
Spectrophotometric Determination

Spectrophotometric Determination Of Piroxicam In Tablets And Gel Forms

2017 ◽  
pp. 1
Author(s):  
Nabil Bader ◽  
Monia Almaghboub ◽  
Nessma Alshelmani
Keyword(s):  
Spectrophotometric Determination
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