<正>1 Results Rosin is a sort of important renewable resources,which is a foremost product of our country forestry. It has very important meaning to modify the rosin based on its molecule structure and active group, to develop some deep processing products, and to endure with rosin new characteristic[1]. This work uses the rosin and acrylic acid to form rosin adduct, and then reacted with 2-hydroxyethyl methacrylate (HEMA) to form ester under the different condition. The effect of different ratios with the adduct and HEMA, catalyst types and levels on the esterification was investigated. The molecular structure of the adduct and the ester was characterized with IR spectrum. Their thermal stabilities were conducted with thermal analyzer. Experiment results show that the rosin ester was prepared successful, the best esterification condition was found out. The thermal stability of the rosin ester from acrylic acid rosin and HEMA was improved. The rosin ester may be used as negative photoresist[2].
