Plasticizer Retention in PVC Geomembranes | Waste Containment
The paper recommends that a minimum average plasticizer molecular weight of 400 be used to ensure long-term plasticizer retention in the field. The weighted-average method for calculating the average molecular weight is recommended when two or more plasticizers are incorporated into the PVC geomembrane.
Plasticizer Retention in PVC Geomembranes - ResearchGate
Plasticizers are used to make PVC flexible so it can be used as a geomembrane for containment purposes. Plasticizers can migrate from PVC geomembranes over time because of contact with...
PLASTICIZER MOLECULAR WEIGHT AND PLASTICIZER RETENTION IN PVC
The mechanisms controlling plasticizer retention in contact with these three media, air, liquid, or a solid, are described below. 2.1 Plasticizer retention in air Volatile loss or...
The influence of molecular weight on plasticizer retention
While this is true, sufficient amounts of plasticizer are retained by the PVC material after migration if a minimum molecular weight is used in the plasticizer. For this reason, the PVC Geomembrane Institute (PGI) has developed the PGI-1104 Specification, which requires an average plasticizer molecular weight greater than or equal to 400 to
Clarifying the nomenclature of Elvaloy-based geomembranes
As a result, plasticizer migration and loss decreases with increasing molecular weight. In 2004 the Fabricated Geomembrane Institute (FGI) set the minimum plasticizer molecular weight at 400 grams/mole to ensure suitable long-term performance of PVC geomembranes in containment applications.