聚合物中的杂质是什么？

聚合物中的杂质是什么？

What is an impurity in a polymer?

聚合物中的杂质是指在制造的聚合物物质中存在的非预期成分。它可能来自起始原料，例如单体或任何其他反应物，也可能是生产过程中二次反应或不完全反应的产物。即使它存在于最终物质中，也并非有意添加。聚合物中的杂质包括未反应的单体或其他反应物、残留的聚合催化剂或制造过程中产生的任何污染物。有关杂质的定义和详细处理指南，请参阅《REACH 和 CLP 物质识别和命名指南》第 4.2 节“成分明确的物质”、第 4.3 节“UVCB 物质”以及第 5 章“检查物质是否相同的标准”：http://echa.europa.eu/guidance-documents/guidance-on-reach

An impurity in a polymer is defined as an unintended constituent present in the manufactured polymer substance. It may originate from the starting materials, such as the monomers or any other reactants, or be the result of secondary or incomplete reactions during the production process. While it is present in the final substance it was not intentionally added. Examples of impurities in a polymer include unreacted monomers or other reactants, residual polymerisation catalyst, or any contaminant from the manufacturing process. The definition and detailed guidance on how to handle impurities can be found in Section 4.2.- 'Substances of well defined composition', Section 4.3.- 'UVCB substances', and Chapter 5- 'Criteria for checking if substances are the same' of the Guidance for identification and naming of substances Under REACH and CLP: http://echa.europa.eu/guidance-documents/guidance-on-reach