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Citation: SUN Li-Mei, LI Ming-Yuan, LIN Mei-Qin, GUO Ji-Xiang, PENG Bo, DONG Zhao-Xia. Synthesis and Hydration Properties of Water Soluble Phenol-formaldehyde Resin[J]. Chinese Journal of Applied Chemistry, ;2008, 25(8): 961-965. shu

Synthesis and Hydration Properties of Water Soluble Phenol-formaldehyde Resin

1.
Enhanced Oil Recovery Research Center, China University of Petroleum-Beijing, Beijing 102249

Corresponding author: LI Ming-Yuan,
Received Date: 17 August 2007
Available Online: 13 December 2007

The hydration properties of a synthesized water soluble phenol-formaldehyde resin, and the influences of reaction parameters on the properties of it were investigated with dynamic light scattering technology, and by means of viscosity and critical coagulating concentration(CCC) determination. The results show that the resin prepared with sodium hydroxide as catalyst at a phenol/formaldehyde mole ratio of 3:1 can be dissolved in distilled water to form a transparent solution. The viscosity of a 10% resin solution ranges from 1.529 1 mPa·s to 6.064 7 mPa·s, and the dispersed unit in a 50 mg/L resin solution exhibits a hydrodynamics diameter between 2.1 nm and 21.1 nm and a Zeta potential varying from -54.38 mV to -10.07 mV. NaCl can weaken the resin hydration and make the resin flocculate, the CCC for different resin product solution is from 0.014 mol/L to 0.099 mol/L. The hydration properties of the resin under different reaction conditions show that along with the prepolymer mass fraction, the polymerization degree of the resin product is increased as the reaction time and reaction temperature increase, causing the viscosity of 10% resin solution and the hydrodynamics diameter of resin aggregate in dilute solution to increase. On the contrary, the CCC of the resin dilute solution and the Zeta potential of the rein aggregate are decreased. Furthermore, the change of the resin caused by the prepolymer mass fraction difference is comparatively insignificant. Otherwise, reaction time can intensively affect the product. In addition, the polycondensation below 90℃ is difficult to take place.
- water soluble phenol-formaldehyde resin,
- hydration,
- viscosity,
- hydrodynamics diameter,
- Zeta potential,
- critical coagulating concentration
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