4. PP geomembranes
4.1 Composition
Polypropylene (PP) is a polyolefin like polyethylene. PP is a relatively rigid thermoplastic polymer.
For example, PP is used to make geogrids, and PP geotextiles are only flexible thanks to the fineness of their filaments.
The base material used in PP geomembranes is a copolymer of polypropylene (20%) and ethylene-propylene (80%). This copolymer has a degree of crystallinity of 5% and is flexible. As with HDPE, a melt flow index can be measured for the waterproof compound in PP geomembranes. This is measured at 230ºC, instead of 190ºC for HDPE.
The waterproof compound used in PP geomembranes comprises approx. 97% polypropylene-ethylene-propylene copolymer,...
The Ultimate Scientific and Technical Reference
This article is included in
Public works and infrastructure
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
PP geomembranes
Conclusion
Bibliography
Websites
-
IGS – International Geosynthetics Society
-
CFG – French Geosynthetics Committee
- ...
Events
-
International Congress on Geosynthetics
Organized under the aegis of the International Geosynthetics Society (IGS), the congress is held every four years: Paris (1977), Las Vegas (1982), Vienna (1986), The Hague (1990), Singapore (1994), Atlanta (1998), Nice (2002), Yokohama (2006), Guaruja/Sao Paulo (2010), Berlin (2014), Seoul (2018).
Regional congresses,...
The Ultimate Scientific and Technical Reference
