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cracking
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cracking

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The lighter alkanes methane, ethane, propane, and butane, showing the aliphatic chains, where a hydrogen atom bonds to a carbon atom at all available sites.
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Cracking occurs when a larger molecule is broken down into a smaller molecule by the heating or the addition of a catalyst. When ethane is heated ethylene is formed.

Chemical reaction in which a large alkane molecule is broken down by heat into a smaller alkane and a small alkene molecule. The reaction is carried out at a high temperature (600°C/100°F or higher) and often in the presence of a catalyst. Cracking is a commonly used process in the petrochemical industry.

It is the main method of preparation of alkenes and is also used to manufacture petrol from the higher-boiling-point fractions that are obtained by the fractional distillation of crude oil (unrefined petroleum).
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Mentioned in?  References in periodicals archive?   Hutchinson browser?   Full browser?
 
Relating Craze Behavior to Failures of PE Pipes in Service A review of the literature addressing crazing in polymers indicates that a number of different models have been proposed to predict craze formation, growth, and subsequent separation in polymers.
Fracture prediction in tough polyethylene pipes using measured craze ... by Davis, P.; Burn, S.; Gould, S. / Polymer Engineering and Science
INTRODUCTION The occurrence of crazing in semicrystalline polymers, particularly in polyethylene, is well documented [1, 2].
Characterization of the fracture behavior of polyethylene using ... by Ting, S.K.M.; Williams, J.G.; Ivankovic, A. / Polymer Engineering and Science
The residual mechanical properties of crazed polycarbonate were then correlated to the crazing stress, relative craze density and strain rate.
Measurement of the residual mechanical properties of crazed ... by Clay, Stephen B.; Kander, Ronald G. / Polymer Engineering and Science
 
 
 
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