基于单宁模型物的丙烯酸酯单体制备及性能研究

以没食子酸甲酯（MG）作为单宁模型物，利用丙烯酰氯（AC）对MG进行酯化反应改性，合成丙烯酸没食子酸甲酯（MG-AC）。考察了原料物质的量比和温度对产物得率的影响，并采用傅里叶变换红外光谱（FT-IR）、气相色谱-质谱联用仪（GC-MS）、元素分析、核磁共振碳谱（¹³C NMR）、凝胶色谱（GPC）对产物进行了分析。结果表明：合适的反应条件是35℃，n（AC）：n（MG）为1.1：1，该条件下产物得率为83.9%。FT-IR分析显示丙烯酸酯官能团成功接枝到没食子酸甲酯上；GC-MS分析产物的纯度为98.86%；元素分析结果显示碳、氢、氧的质量分数分别为55.46%、4.20%和40.33%，接近于MG-AC的理论值，说明产物是单取代丙烯酸没食子酸甲酯；¹³C NMR分析也表明产物为单取代；GPC分析结果显示，在引发剂作用下MG-AC可以发生溶液聚合，聚合物的重均相对分子质量（M_w）为13 637，数均相对分子质量（M_n）为11 820，M_w/M_n=1.15，表明MG-AC具有较好的聚合活性。

Sythesis and Characterization of Acrylate Monomer Derived from Tannins Model Compound

Methyl gallate acrylate (MG-AC) was prepared by reaction between methyl gallate (MG) (tannins model compound) and acryloyl chloride (AC).The effects of temperature and raw materials molar ratio on the yield of product were investigated.FT-IR,GC-MS,elemental analysis,¹³C NMR and GPC were used to characterize its structure and polymerization activity.And then,the optimum synthesis conditions were 35℃,molar ratio of AC and MG 1.1:1.Under these conditions,the yield of product was 83.9%.FT-IR results showed that the acrylate-functional-group was successfully grafted onto methyl gallate.GC-MS results showed that the purity of methyl gallate acrylate was 98.86%.Elemental analysis indicated that the mass fractions of carbon,hydrogen and oxygen were 55.46%,4.20% and 40.33%,respectively.They almost agreed to the theoretical value of MG-AC.Thus,the synthesized MG-AC was monosubsituted monomer.¹³C NMR results comfirmed the monosubsituted structure of monomer.GPC analysis results showed that the MG-AC could polymerize in the presence of the initiator,and the M_w,M_n and M_w/M_n of the polymer were 13 637,11 820 and 1.15.All the results showed that the methyl gallate acrylate was successfully synthesized and had good polymerization activity.