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A GC/MS method was developed and successfully validated for the determination of adipate plasticizers in ham sausage migrated from polyvinylidene chloride (PVDC) packaging film. The sample pretreatment includes liquid extraction, solvent evaporation, and reconstitution before and after solid phase extraction (SPE). For the 5 adipate plasticizers studied, the SPE process with Oasis MAX cartridge showed an extraction efficiency from 85.7% to 106%, and the calibration curves are all linear in the range of 5 to 1000 ng/g with correlation coefficients greater than 0.998. The method proved to be accurate and precise; the average intraday recovery ranges from 85.4% to 114.6% with a %CV value from 2.5 to 11.3, and the average interday recovery from 83.6% to 118.5% with a %CV value from 2.8 to 15.6, respectively, for the adipate plasticizers. The method is sensitive and was effectively applied in the kinetic and penetration studies of the adipate plasticizers migrating from food-grade PVDC packaging film into ham sausage. The experimental data showed that approximately 6.8% of dibutyl adipate (DBA) in the packaging film migrated into the ham sausage in 4 mo and the migration reached the innermost portion of the sausage in 6 mo.

Maleic anhydride (MA) grafted styrene ethylene butadiene styrene copolymer (SEBS-g-MA) and styrene MA copolymer (SMA) were used to compatibilise and toughen poly(2,6-dimethyl-1,4phenylene oxide)/polyamide 6 (PPO/PA6) blend. The mechanical properties, morphology and rheological behaviour of PPO/PA6/SEBS-g-MA/SMA blends with different SEBS-g-MA and SMA content were studied. SEBS-g-MA was an effective impact modifier for PPO/PA6/SMA blends, and the notched Izod impact strength reached 143 J m 21 at the SEBS-g-MA content of 25 parts per hundred rubber (phr). The morphology observation showed that the dispersed phase of PPO/ PA6 blends was more uniform, and its size became smaller after the addition of SMA, indicating an effective compatibilisation. Furthermore, the elongation at break of the blend reached 86?3% at the SMA content of 5 phr. In conclusion, PPO/PA6/SEBS-g-MA/SMA blends with better mechanical properties could be obtained at the SEBS-g-MA content of 20-25 phr and SMA content of 2-5 phr.