Abstract: Polyester has unique biodegradability, bioabsorbability and biocompatibility. The existing raw materials for the production of polyester products generally come from the petrochemical industry is not a biomass material. In this experiment, methylene succinic acid (IA) and its sulfonated product succinic acid⁃2⁃methyl sulfonate (ISNa) and 1,4⁃butanediol (BD) were used as raw materials, Polycondensation method to prepare a new type of water⁃based polyester (PBIINa). The effects of catalyst type, polycondensation time and system temperature on the properties of PBIINa were investigated. The product structure was characterized by Fourier transform infrared spectroscopy (FT⁃IR) and nuclear magnetic resonance (1H⁃NMR) and the water solubility of the polyester was tested. The study found that the optimum conditions for the synthesis of the polyester: the esterification stage 5.0 h system temperature 180 ℃, n(BD)/n(IA)/n(ISNa)=1.00∶0.88∶0.17, catalyzed by SnCl2, system pressure 0.1 MPa, polycondensation stage 2.5 h, system temperature 160 ℃.

Key words: Methylene succinic acid, Succinic acid-2-methyl sulfonate, 1,4?butanediol, Water?based polyester

摘要： 聚酯具有独特的可生物降解性、生物可吸收性及生物相容性。现有聚酯产品生产原料一般来源于石油化工材料，并非生物质材料。以亚甲基丁二酸（IA）、磺化产物丁二酸⁃2⁃甲基磺酸钠(ISNa)和1,4⁃丁二醇(BD)为原料，采用直接酯化⁃缩聚法制备了一种新型水溶性聚亚甲基丁二酸丁二醇酯（PBIINa）。考察了催化剂种类、缩聚时间、体系温度等对PBIINa性能的影响。利用傅立叶红外光谱（FT⁃IR）、核磁共振氢谱（1H⁃NMR）对产物结构进行表征，并检测该聚酯的水溶性。结果表明，该聚酯的最佳合成条件为：酯化反应时间5.0 h、酯化反应温度180 ℃、 n（BD）/n（IA）/n（ISNa）=1.00∶0.88∶0.17，催化剂SnCl2、体系压力0.1 MPa、缩聚反应时间2.5 h、缩聚反应温度160 ℃。

关键词: 亚甲基丁二酸, 　甲基丁二酸?5?磺酸钠, 　1, 4?丁二醇, 　水性聚酯