【摘要】 以1,4-环己烷二甲醇（CHDM）、对苯二甲酸（PTA）、均苯四甲酸酐（PMDA）和异氰尿酸三缩水甘油酯（TGIC）为原料,通过直接酯化、减压缩聚和熔融扩链的方法制备了一系列分子量可控的芳香族聚酯——聚对苯二甲酸-1,4-环己烷二甲醇酯（PCT）。采用傅里叶红外光谱（FTIR）、凝胶渗透色谱（GPC）、差示扫描量热（DSC）、热重分析（TG）、广角X-射线衍射（WXRD）、电子万能试验机分别研究了其分子结构、热性能和力学性能。结果表明:当n（CHDM）∶n（PTA）=1.2时,用复配催化剂钛酸四丁酯（TBT）、二氧化锗（GeO₂）、三氧化二锑（Sb₂O₃）（用量均为0.1mg/g）以及醋酸钴（Co（Ac）₂）（用量为0.05mg/g）,290℃下缩聚3h得到数均分子量较大的PCT,特性黏数（[η]）为0.560dL/g。PMDA-TGIC联用扩链可以获得特性黏数为0.680dL/g的扩链PCT,用其制备的薄膜拉伸强度可达27.6 MPa。更多还原

【Abstract】 A series of poly（1,4-cyclohexylenedimethylene terephthalate）（PCT） with controllable molecular weight was prepared by direct esterification,subsequent polycondensation and molten chainextending reaction using 1,4-cyclohexanedimethanol（CHDM）,terephthalic acid（PTA）,pyromellitic dianhydride（PMDA）and triglycidyl isocyanurate（TGIC）as materials.The molecular structure,thermal and mechanical properties of polymers were characterized by Fourier Transform Infrared Spectrum（FTIR）,Gel Permeation Chromatograph（GPC）,Differential Scanning Calorimetry（DSC）,Thermal Gravity（TG）analysis,Wide Angle X-ray Diffraction（WAXD）and electronic universal testing machine.Results showed that when n（CHDM）∶n（PTA）was 1.2,and combined catalysts including tetrabutyl titanate（TBT）,germanium dioxide（GeO₂）,antimony trioxide（Sb₂O₃）（0.1 mg/g）and cobalt acetate（Co（Ac）₂）（0.05 mg/g）,reaction 3 hat 290℃,the intrinsic viscosity of PCT was 0.560 dL/g.Then the product was used to react with combination chain-extend agent of PMDA-TGIC,which had the intrinsic viscosity 0.680 dL/g.The films of PCT and chain-extend PCT had excellent mechanical property.更多还原