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。
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.
出处
《功能高分子学报》
CSCD
北大核心
2017年第4期437-443,共7页
Journal of Functional Polymers
