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Mechanical properties and chemistry of carbonization of Phenol formaldehyde resin

✍ Scribed by Z. Laušević; S. Marinković

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
454 KB
Volume
24
Category
Article
ISSN
0008-6223

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✦ Synopsis

Phenol formaldehyde precursors in the form of powder and I mm thick platelets were carbonized in flowing nitrogen up to 1000°C with a heating rate of 2O"/h. Evolution of carbonization products is different for the bulk and powdered samples. The observed differences are caused by secondary reactions of water with surrounding polymer producing H, and CO,, which occur in the bulk samples. Flexural strength and modulus show minima at about 550°C which are related to maximum rate of H: and CO, evolution produced by the secondary reactions of water with the polymer structure.

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