Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Embrittlement time-carbonyl concentration

The time to embrittlement of polyolefins during photo-oxidation is not directly related to initiation carbonyl concentration (9-11). This is exemplified for HOPE in Figure 3 and a similar relationship exists for LDPE and... [Pg.347]

Figure 18. Relationship between peroxide and carbonyl concentrations and embrittlement time for polypropylene. (—CD—) peroxide formation, open chamber (— —) carbonyl formation, open chamber (—A—) peroxide formation, closed chamber (— —) carbonyl formation, closed chamber. Figure 18. Relationship between peroxide and carbonyl concentrations and embrittlement time for polypropylene. (—CD—) peroxide formation, open chamber (— —) carbonyl formation, open chamber (—A—) peroxide formation, closed chamber (— —) carbonyl formation, closed chamber.
Concentration Carbonyl index Time to mols / 100 g (before exposure) embrittlement (hrs)... [Pg.346]

At the end of this time, no change could be observed in the vinylidene concentration, no hydroperoxide could be detected either by chemical analysis or by IR spectroscopy and no additional carbonyl was formed (31). On irradiation, vinylidene disappearence and carbonyl formation rates were identical to the control and the time to embrittlement was the same. [Pg.357]

See other pages where Embrittlement time-carbonyl concentration is mentioned: [Pg.52]    [Pg.53]    [Pg.828]    [Pg.67]    [Pg.299]    [Pg.173]   


SEARCH



Concentration time

Embrittled

Embrittled Embrittlement

Embrittlement times

© 2024 chempedia.info