Abstract
The determination of residual 4-vinyl-1-cyclohexene (4-VCy, butadiene dimer) in polybutadiene (PBD) household wrapping films and acrylonitrile-butadiene-styrene (ABS) products was studiedPBD films and ABS products were dissolved in tetrahydrofuran and N, N-dimethyl-formamide, respectively. The concentration of 4-VCy in each polymer solution was determined by gas chromatography and mass fragmentography. The extents of 4-VCy migration from ABS sheet to water, 4% acetic acid, 20% ethanol and n-heptane were measured by mass fragmentography, using selected ion recording at m/e 54.The recovery of 4-VCy added to ABS sheet was found to be 89.3-103.0% in the range of 40.0-80.0μg per sample, and the coefficient of variation was found to be 5.4%. Commercial ABS products such as sheets, ladles, graters and lunch trays were analyzed and found to contain 14-210ppm 4-VCy.No 4-VCy migration from ABS sheet to four food simulants was found, though some migration into n-heptane occurred.
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