丙烯酸松香加成物与GMA酯化物的合成与表征

以丙烯酸松香加成物（RA）和甲基丙烯酸缩水甘油酯（GMA）为单体，三乙胺为催化剂，对苯二酚为阻聚剂，在有机溶剂甲苯中合成了RA与GMA酯化物（RAG），采用单因素和正交试验对酯化反应进行优化。通过傅里叶变换红外光谱（FT-IR）、凝胶渗透色谱（GPC）、黏度计、核磁共振氢谱（¹H NMR）和热重（TG）对酯化物进行了分析与表征。结果表明，RA与GMA酯化物较优合成条件为n_GMA：n_RA=2：1，三乙胺用量为RA质量的0.5%，120℃下反应4 h，该条件下合成的酯化物为深黄棕色澄清液体，酯化率为99.5%，数均相对分子质量为547，重均相对分子质量为848，25℃下测得其质量分数51%甲苯溶液的黏度为10 mPa·s。FT-IR和¹H NMR分析表明成功合成了RA与GMA酯化物。TG分析表明酯化物热稳定性高于丙烯酸松香加成物。

Synthesis and Characterization of Ester of Acrylic Rosin Adduct and GMA

The ester(RAG) was synthesized with acrylic rosin adduct(RA) and glycidyl methacrylate(GMA) as monomers, triethylamine as catalyst, hydroquinone as inhibitor in toluene solution. The esterification reaction conditions were optimized by single factor experiment and orthogonal experiments. The RAG was analyzed and characterized by Fourier transform infrared spectroscopy(FT-IR), gel permeation chromatography(GPC), viscometer, nuclear magnetic resonance(¹H NMR), and thermal gravimetric(TG) analysis. The results showed that the optimum conditions were the molar ratio of GMA and RA at 2:1, the dosage of triethylamine 0.5% (based on RA weight), 120℃ and 4 h. Under these conditions, the ester was deep yellowish brown clear liquid, the esterification rate was 99.5%, the number average relative molecular weight was 547, the weight average relative molecular weight was 848, and the viscosity of the ester in toluene was 10 mPa·s at 25℃ with the mass fraction of 51%. The FT-IR and ¹H NMR showed that RAG was successfully prepared. The TG showed that the thermal stability of the ester was higher than that of the acrylic rosin adduct.