Alcohol and PVC trace chemical migration reaction is how?

1. Alcohol and PVC chemical migration reaction is the essence of alcohol caused by the plasticizer in PVC migration reaction. 2. Polyvinyl chloride (PVC) products contain certain plasticizer components (such as DEHA), these plasticizers in the products of the secondary processing and use of the process, there will be varying degrees of migration, volatilization. In addition to polyester and other large relative molecular mass plasticizers, plasticizers are organic small molecules, will be added to PVC, and not polymerized to the PVC polymer chain, but to hydrogen bonding or van der Waals force and PVC molecules combined with each other to retain their independent chemical properties. When soft PVC comes into contact with a stationary medium (gas phase, liquid phase, solid phase), the plasticizer is slightly resolved out of the PVC and into the medium. As the object of plasticizer migration of polymer media, and plasticizer compatibility, and strong polarity (such as alcohol), plasticizers are prone to migration phenomenon. 3. When using PVC, encountered in water or organic solvents (such as ethanol) and other substances, phthalate plasticizers can be transferred from the PVC plastic out of the pollution of the environment, and with the food chain for the enrichment and transfer, thus generating a larger biological Hazard. Plasticized PVC is widely used, and plasticizers can migrate from PVC, such as plasticizers can migrate from plasticized PVC medical devices and blood storage bags into physiological fluids. Nowadays, plasticizers have been detected in storage devices, plasma, serum, medicinal fluids, fatty foods, hemodialysis, and in patients receiving fluids. Therefore, PVC needs to be modified as necessary to prevent migration reactions. Hope this helps, thanks