高分子量PCT聚酯的合成及性能表征

发布时间：2018-05-28 17:09

  本文选题：均苯四甲酸酐 + 异氰尿酸三缩水甘油酯　； 参考：《功能高分子学报》2017年04期

【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(GeO_2)、三氧化二锑(Sb_2O_3)(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。
[Abstract]:The direct esterification was carried out by using 1,4-cyclohexane-dimethyl alcohol (CHDMN), terephthalate (PTAA), tetracarboxylic anhydride (PMDAs) and triglycidyl isocyanate (TGIC) as raw materials. A series of aromatic polyester, poly (terephthalic acid) -1 (4-cyclohexane dimethanolyl) (PCT) with controllable molecular weight, were prepared by decompression Polycondensation and melt chain extension. Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), differential scanning calorimetry (DSCC), thermogravimetric analysis (TGN), wide-angle X-ray diffraction (WXRD), electronic universal testing machine were used to study the molecular structure, thermal properties and mechanical properties. The results show that when n(CHDM):n(PTA)=1.2, The high molecular weight PCTs can be obtained by using the complex catalyst tetrabutyl titanate (TBT), germanium oxide (GE _ 2O _ 2) _ 2, antimony trioxide (SB _ 2O _ 3) (in the amount of 0.1 mg / g) and cobalt acetate (Co _ 2 O _ (2) O _ (2) at 290 鈩，

本文编号：1947514