
环状酸酐和环氧化物共聚制备聚酯及其性能研究
李思漩, 李鹏, 戴鑫, 李晓双, 胡君航, 宋昭峥, 蒋庆哲
环状酸酐和环氧化物共聚制备聚酯及其性能研究
Preparation and Properties of Polyesters from Copolymerization of Cyclic Anhydrides and Epoxides
为解决合成聚酯过程中缩聚聚合的高能耗和环酯开环聚合单体种类少的问题,使用胺基酚类铁系配合物催化环状酸酐与环氧化物共聚反应,成功合成了六种聚酯产物。采用核磁共振氢谱(1H NMR)、傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、接触角测量仪、热重分析(TG)、差示扫描量热(DSC)和凝胶渗透色谱(GPC)对聚酯的结构和性能进行表征。结果表明:所有聚酯均为无定型结构且具有亲水性能;聚酯起始分解温度(T 5%)为250~300 ℃,玻璃化转变温度(T g)为55~139 ℃。含有刚性环己烷分子结构的聚酯T g较高,热力学稳定性能较好。
In order to solve the problems of high energy consumption of condensation polymerization and small variety of monomers for ring-opening polymerization of cyclic esters in the process of synthesizing polyesters, six polyester products were successfully synthesized using aminophenolic iron-based complexes to catalyze the copolymerization reaction of cyclic anhydride and epoxides. Nuclear magnetic resonance hydrogen spectroscopy (1H NMR), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), contact angle meter, thermogravimetric analysis (TG), differential scanning calorimetry (DSC), and gel permeation chromatography (GPC) were used to characterize the structures and properties of polyester. The results showed that all the polyesters with hydrophilic properties were amorphous structures. The initial decomposition temperature (T 5%) of polyesters was 250~300 ℃ and the glass transition temperature (T g) of polyesters was 55~139 ℃. Polyesters containing rigid cyclohexane structure showed higher T g and better thermomechanical stability performance.
Polyester / Cyclic anhydrides / Epoxides / Copolymerizaiton
TQ323.4+1
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