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Environmental stress cracking resistance of blow moded poly(ethylene terephthalate) containers
Author(s) -
Tekkanat Bora,
McKinney Bryan L.,
Behm Dale
Publication year - 1992
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760320602
Subject(s) - materials science , crazing , environmental stress cracking , cracking , composite material , poly ethylene , stress (linguistics) , container (type theory) , ethylene , stress corrosion cracking , polymer , philosophy , biochemistry , catalysis , chemistry , linguistics , alloy
A method is developed for determining the environmental stress cracking resistance (ESCR) of blow molded poly(ethylene terephthalate) (PET) containers. By this method, the internal chamber of a container is presurized in 68.9 kPa (10 psi) increments while the outside of the base is being exposed to an environmental stress cracking (ESC) agent. The base of the container is examined after each 68.9 kPa of pressurization if crazing has occurred. The process is continued until a threshold value of craze initiation pressure (CIP) can be determined. Low CIP for the type of containers tested generally corresponds to a high rate of field failures. The method does not only gage the susceptibility of different types of one‐piece PET containers to ESC but also provides helpful information to improve the container designs.