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Citation: LI Guo-Feng, HU Ke-Liang, HUANG Yun-Lan, YANG Hai-Yang, JI Ming-Rong. Modification of Asphalt by Tung Oil Prepolymer[J]. Chinese Journal of Applied Chemistry, ;2002, 19(6): 544-547. shu

Modification of Asphalt by Tung Oil Prepolymer

1.
Center of Physical Sciences, University of Science and Technology of China, Hefei 230026

Corresponding author: HU Ke-Liang,
Received Date: 15 September 2001
Available Online: 6 February 2002

Tung oil prepolymer was prepared by mixing tung oil with anhydrous aluminum chloride at 230℃ for 1 h. Asphalt was modified by tung oil perpolymer through mixing at 240℃ until no 993 cm^-1 band was observed. Intrinsic viscosity number [Z] measurement and TLC were used to monitor the prepolymerization reaction. The results showed that the prepolymer react mainly with the colloid and asphaltene compositions of asphalt. Part of the modified asphalt acts as an interfacial agent which is in favor of the compatibility of the mixture. The copolymer of asphaltene/tung oil prepolymer could not only reduce the asphaltene's rigidity and incompatibility, but also stabilize the colloid part of asphalt improving its penetration and low temperature ductility. A good result was obtained by adding 3%~6%(mass fraction) tung oil prepolymer into the asphalt.
- asphalt modification,
- tung oil prepolymer,
- low temperature ductility,
- penetration index
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