合成了含碘的甲基丙烯酸酯单体 1-(2，3，5-三碘苄基)-N-甲基丙烯酰氧乙基氨 基甲酸酯(TIMEC)，通过核磁共振氢谱( 1 H-NMR)和傅里叶变换红外光谱(FT-IR)确认其 结构与设计结构相符． 将 TIMEC 加入到双酚 A 甲基丙烯酸缩水甘油酯/聚三乙二醇二甲 基丙烯酸酯(Bis-GMA/TEGDMA)光固化树脂体系中制备 X 射线阻射性牙科树脂，研究了 单体含量(质量分数)对树脂的相对 X 射线阻射性(RXO)、双键转化率、体积收缩率、吸水 率、溶解率和力学性能的影响;发现:与对照组相比，含 TIMEC 的树脂的相对 X 射线阻射 性显著提高，吸水率、溶解率以及收缩率也有不同程度的改善;虽然某些配方的树脂的双 键转化率和力学性能有所下降，但含 20% TIMEC 的树脂的各项性能都较为优良，RXO 值 达 113%，双键转化率为 57. 5%，体积收缩率为 6. 41%，吸水率为 2. 65%，溶解率为 0. 49%，弯曲模量为 3038MPa，弯曲强度为 123. 1MPa，除双键转化率外均优于对照组，表 明含 TIMEC 的树脂具较大的应用潜力．

2,3,5-triiodobenzyl methacryloyloxyethylcarbamate (TIMEC),an iodine-containing methacrylate mono- mer,was synthesized,and the consistency of its structure with the designed one was confirmed by means of 1 H- NMR and FT-IR. Then,the monomer was incorporated into the Bis-GMA/TEGDMA light-curable dental resin sys- tem to prepare a X-ray radio-opaque dental resin,and the effects of the monomer mass concentration on the relative radiopacity (RXO),double bond conversion (DC),volumetric shrinkage (VS),water sorption (WS),solubili- ty (SL) and mechanical properties of the TIMEC-containing resin formulations were investigated.It is found that,as compared with the control resin，namely the Bis-GMA/TEGDMA without TIMEC,the TIMEC-containing resins are of higher RXO and lower WS,SL and VS.Moreover,although the DC and mechanical properties of part resins are moderately reduced,the resin containing 20% TIMEC is excellent in each index,specifically,its RXO,DC,VS,WS,SL,flexural modulus and flexural strength are 113%,57. 5%,6. 41%,2. 65%,0. 49%,3038MPa and 123. 1MPa respectively,all of which are superior to those of the control resin except the DC.The results show that TIMEC is of potential application prospects.