Geosynthetics June/July 2019 - 9

The molecular weight of traditional
plasticizers, e.g., phthalates, range from
200 to 530 grams/mole (Stark et al.
2005). For comparison, KEE exhibits
a molecular weight of 100,000 to more
than 260,000 grams/mole or 500 times
greater than the molecular weight of traditional liquid plasticizers. A KEE molecular weight of 100,000 grams/mole is 250
times higher than currently required (400
grams/mole) by the FGI 1117 specification for PVC geomembranes.
KEE is a solid-phase (polymeric) plasticizer, not liquid, which helps explain
its high molecular weight and resistance
to migration. This allows the resulting
geomembranes plasticized with KEE to
maintain their flexibility for a longer time,
resulting in a longer service life. Because of
its flexibility and longevity, KEE-blended
material is used for exposed single-ply
roofing, environmental containment liner
systems, "no-dig" water and sewer pipe
repair liners, coated fabrics, footwear, and
wire and cable coatings.
Two broad classes of KEE are available under the Elvaloy product name
and are used to plasticize PVC geomembranes. These are the standard
grades (Elvaloy 741 and 742) and Elvaloy
High Performance (HP) series grades
that have an even higher molecular
weight. As a result of the confusion over
the acronyms, the geomembrane industry
most commonly uses EIA and KEE to
describe PVC-blended geomembranes,
which is only partially correct.
For geomembrane applications, PVC
resin is blended with KEE to produce a
flexible and durable geomembrane for
environmental containment applications.
The resulting blend of PVC resin and
KEE is called EIA or EIP. To clarify, EIA
and EIP are two names for the same polymer, which further causes confusion.

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Geosynthetics June/July 2019

Table of Contents for the Digital Edition of Geosynthetics June/July 2019

Geosynthetics June/July 2019 - Cover1
Geosynthetics June/July 2019 - Cover2
Geosynthetics June/July 2019 - 1
Geosynthetics June/July 2019 - 2
Geosynthetics June/July 2019 - 3
Geosynthetics June/July 2019 - 4
Geosynthetics June/July 2019 - 5
Geosynthetics June/July 2019 - 6
Geosynthetics June/July 2019 - 7
Geosynthetics June/July 2019 - 8
Geosynthetics June/July 2019 - 9
Geosynthetics June/July 2019 - 10
Geosynthetics June/July 2019 - 11
Geosynthetics June/July 2019 - 12
Geosynthetics June/July 2019 - 13
Geosynthetics June/July 2019 - 14
Geosynthetics June/July 2019 - 15
Geosynthetics June/July 2019 - 16
Geosynthetics June/July 2019 - 17
Geosynthetics June/July 2019 - 18
Geosynthetics June/July 2019 - 19
Geosynthetics June/July 2019 - 20
Geosynthetics June/July 2019 - 21
Geosynthetics June/July 2019 - 22
Geosynthetics June/July 2019 - 23
Geosynthetics June/July 2019 - 24
Geosynthetics June/July 2019 - 25
Geosynthetics June/July 2019 - 26
Geosynthetics June/July 2019 - 27
Geosynthetics June/July 2019 - 28
Geosynthetics June/July 2019 - 29
Geosynthetics June/July 2019 - 30
Geosynthetics June/July 2019 - 31
Geosynthetics June/July 2019 - 32
Geosynthetics June/July 2019 - 33
Geosynthetics June/July 2019 - 34
Geosynthetics June/July 2019 - 35
Geosynthetics June/July 2019 - 36
Geosynthetics June/July 2019 - 37
Geosynthetics June/July 2019 - 38
Geosynthetics June/July 2019 - 39
Geosynthetics June/July 2019 - 40
Geosynthetics June/July 2019 - 41
Geosynthetics June/July 2019 - 42
Geosynthetics June/July 2019 - 43
Geosynthetics June/July 2019 - 44
Geosynthetics June/July 2019 - 45
Geosynthetics June/July 2019 - 46
Geosynthetics June/July 2019 - 47
Geosynthetics June/July 2019 - 48
Geosynthetics June/July 2019 - 49
Geosynthetics June/July 2019 - 50
Geosynthetics June/July 2019 - 51
Geosynthetics June/July 2019 - 52
Geosynthetics June/July 2019 - 53
Geosynthetics June/July 2019 - 54
Geosynthetics June/July 2019 - 55
Geosynthetics June/July 2019 - 56
Geosynthetics June/July 2019 - Cover3
Geosynthetics June/July 2019 - Cover4
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