Begley T H, Hollifield H C
Food and Drug Administration, Division of Food Chemistry and Technology, Washington, DC 20204.
Food Addit Contam. 1990 May-Jun;7(3):339-46. doi: 10.1080/02652039009373898.
The polymer polyethylene terephthalate (PET) is widely used for packaging food that will be heated or cooked in the PET container. A procedure was developed to predict the potential of PET to migrate from the container into the food. Migration experiments using crystallized polyethylene terephthalate (CPET) and corn oil were performed at 115, 146 and 176 degrees C. From these experiments diffusion coefficients were calculated for the cyclic trimer in PET. By using an Arrhenius plot to obtain the diffusion coefficient and a temperature versus time plot of a microwave susceptor-heated CPET tray, it was possible to predict migration of the cyclic trimer into corn oil under microwave conditions. Predicted values were in good agreement with measured results.
聚对苯二甲酸乙二酯（PET）这种聚合物被广泛用于包装将在PET容器中加热或烹饪的食品。人们开发了一种程序来预测PET从容器迁移到食品中的可能性。使用结晶聚对苯二甲酸乙二酯（CPET）和玉米油在115、146和176摄氏度下进行了迁移实验。通过这些实验计算出了PET中环状三聚体的扩散系数。利用阿仑尼乌斯图获得扩散系数，并通过对微波感受器加热的CPET托盘绘制温度与时间的关系图，得以预测在微波条件下环状三聚体向玉米油中的迁移情况。预测值与测量结果吻合良好。
