本文属塑化聚氯乙烯（ＰＶＣ—Ｐ）防水卷材中增塑剂损失机理及影响因素研究专题中的一部分。作者对防水卷材中的增塑剂的损失形式，损失的控制因素．损失的规律和机制进行了全面分析，并通过实验提出了有关防水卷材增塑剂的挥发损失，抽出损失和迁移损失的测试方法以及扩散速度、质量迁移系数的计算公式。 This article is part of the research topic of plasticizer loss mechanism and influencing factors in plasticized polyvinyl chloride (PVC-P) waterproofing membranes. The authors of the loss of plasticizers in waterproofing membranes, loss control factors. The loss laws and mechanisms were comprehensively analyzed. The test methods for the volatilization loss, extraction loss and migration loss of plasticizers for waterproofing membranes, and calculation formulas for diffusion rate and mass transfer coefficient were presented through experiments.