ANSI/ASTM D5991-1997 聚乙烯对酞酰小片中聚氯乙烯杂质分离和鉴定惯例

标准号：ANSI/ASTM D5991-1997
中文标准名称：聚乙烯对酞酰小片中聚氯乙烯杂质分离和鉴定惯例
英文标准名称：Practice for Separation and Identification of Poly(Viny Chloride) (PVC) Contamination in Poly(Ethylene Terephthalate) (PET) Flake
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1997/3/5 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.10
适用范围：This practice covers four procedures for separation and qualitative identification of poly(vinyl chloride) (PVC) contamination in poly(ethylene terephthalate) (PET) flakes. Note 1 -Although not presented as a quantitative method, procedures presented in this practice may be used to provide quantitative results at the discretion of the user. The user assumes the responsibility to verify the reproducibility of quantitative results. Data from an independent source suggest a PVC detection level of 200 ppm (w/w) based on an original sample weight of 454 g. Procedure A is based on different fluorescence of PVC and PET when these polymers are exposed to ultraviolet (UV) light. Procedure B is an oven test based upon the charring of PVC when it is heated in air at 235C. Procedures C and D are dye tests based on differential staining of PVC and PET. Note 2 -Other polymers (for example, PETG) also absorb the stain or brightener. Such interferences will result in false positive identification of PVC as the contaminant. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazards see Section 8. Note 3 -There is no equivalent ISO standard.