中文

Journal of Shanghai University（Natural Science Edition） ›› 2010, Vol. 16 ›› Issue (5): 508-512.

• Environmental and Chemical Engineering • Previous Articles     Next Articles

Effect of Phosphoric Acid on Water-Soluble Phenol-Formaldehyde Resin Carbonization

  

  1. 1. Key Laboratory of Specially Functional Polymeric Materials and Related Technology,East China University of Science and Technology, Shanghai 200237， China; 2. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2010-06-28 Online:2010-10-30 Published:2010-10-30

PDF

1532

Cited

5

Abstract:

 The water-soluble phenol-formaldehyde resin (PF) with low free phenol was prepared from formaldehyde and phenol in the presence of barium hydroxide. The structure and charring mechanism of the water-soluble PF resin and phosphoric acid modified water-soluble PF resin were studied. The effect of mol ratio of phenol to formaldehyde and the reaction time on char yield ware discussed. The results indicate that the char yield of phosphoric acid modified water-soluble PF (66.7% at 800 ℃) is higher than water-soluble PF (55.0% at 800 ℃) due to an increase in aromaticity by the addition of phosphoric acid, resulting in low decomposition at elevated temperature.

Key words: charring performance; water-soluble; phenol-formaldehyde resin (PF); phosphoric acid

CLC Number: