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6607329 
Journal Article 
Structural study of styrene-butadiene copolymers by pyrolytic capillary gas chromatography 
Hausler, KG; Schroder, E; Muhling, P 
1977 
24 
8 
554-559 
INSPEC:1152722 
The results of qualitative and quantitative pyrolytic capillary gas chromatography and styrene-butadiene copolymers underline that this technique can be used both for identification of these polymers and for determining their microstructure. In the case of products of unknown sequence length distribution the styrene or butadiene content cannot be determined from the butadiene-(1-3) or styrene peak areas, but require the presence of trans and cis butene-(2). The compound 4-cinylcyclohexane, a dimer of butadiene-(1,3), is especially suitable for the determination of the 1,2- and 1,4- contents of the polybutadiene blocks. Quantitative data on the 1,4 trans content can be obtained with the aid of the cleavage products 4-methylpentadiene-(1,3), 2,2-dimethylheptane, and 1-ethyl-cis-2-methylcyclopentane. The area of the styrene peak can be used to differentiate between block copolymers and statistical copolymers.