Styrene oligomers, NMR spectra

In order to assign resonances in the 1H and 13C NMR spectra of polystyrene, styrene oligomers having methyl end groups have been prepared and separated into diastereomers up to tetramer... [Pg.181]

SATO AND TANAKA NMR Spectra of Styrene Oligomers and Polymers 185... [Pg.185]

In this chapter IH and 13C NMR spectra of polystyrene are analysed utilizing styrene oligomers having propyl end groups. [Pg.182]

Figure 4 shows the typical H-NMR spectra of DBV oligomers fractionated from a reaction product obtained at a low conversion. All these spectra are consistent with structure 11, with relative peak intensities being in agreement with the calculated values for 11 (shown in parentheses in Fig. 4). The spectra are very similar to that of the linear styrene dimer 1, except for the virtual absence of vinyl protons. In contrast, the products obtained with BF30Et2 in polar solvents, such as (GHjC j, are cross-linked polymers insoluble in organic solvents.

$Figure 4 shows the typical H-NMR spectra of DBV oligomers fractionated from a reaction product obtained at a low conversion. All these spectra are consistent with structure 11, with relative peak intensities being in agreement with the calculated values for 11 (shown in parentheses in Fig. 4). The spectra are very similar to that of the linear styrene dimer 1, except for the virtual absence of vinyl protons. In contrast, the products obtained with BF30Et2 in polar solvents, such as (GHjC j, are cross-linked polymers insoluble in organic solvents.$

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