赵明良,俞建勇,李发学,王学利
ZHAO Ming-Liang1,YU Jian-yong2,LI Fa-xue1,WANG Xue-Li 2(1.College of Textile

• 1:东华大学纺织学院
• 2:东华大学现代纺织研究院

摘要(Abstract)：

在5 L聚合装置上,成功合成了一系列用间苯二甲酸乙二醇酯-5-磺酸钠(SIPE)和聚乙二醇(PEG)改性的共聚酯(MECDP)。核磁氢谱(1H-NMR)的测试结果表明:聚合物大分子中的对苯二甲酸(PTA)、PEG、SIPE的摩尔比与其投料比基本相符;共聚酯分子链的化学结构,与设想的分子链结构较好地吻合。热重分析仪(TGA)试验结果表明:在氮气和空气的氛围里,热降解温度(T)d均随着PEG质量分数的增加而下降;在空气氛围里的热降解,比在氮气氛围内的热降解更容易发生;在氮气氛围里的TGA曲线,只有一个热失重平台,而在空气氛围里的TGA曲线,有两个热失重平台。特性黏度变化的测试结果表明:PEG的质量分数越高,干燥温度越高,干燥时间越长,共聚酯的特性黏度值变得越小。
A series of copolyesters based on poly(ethylene terephthalate)(PET) were successfully prepared with sodium-5-sulfo-bis-(hydroxyethyl)-isophthalate(SIPE) and poly(ethylene glycol)(PEG) units as modifiers in 5 L reactors.Their chemical structures were characterized by 1H-NMR,and results showed that the actual molar ratio of PTA ∶PEG ∶SIPE were basically consistent with the relative feed ratio.The chemical structures were better accordant with the expected structures of them.Thermal properties of these copolyesters under different conditions were characterized by TGA.Experimental results indicated that thermal degradation temperature(Td) gradually reduced with the PEG content increasing.The results also indicated that the thermal degradation under oxygen conditions happened easily compared to that under nitrogen conditions.The TGA curves under nitrogen atmosphere had only one weight-loss stage,while the curves under oxygen atmosphere owned two weight-loss stages.Experimental results of the intrinsic viscosity indicated that the intrinsic viscosity decreased when the drying temperature was increased,or the drying time was prolonged,or more PEG units were incorporated into molecular chains.

关键词(KeyWords)： 共聚酯;聚乙二醇;热降解性能;特性黏度
copolyester,PEG,thermal degradation property,the intrinsic viscosity

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项资金(No.12D10143)资助

作者(Author): 赵明良,俞建勇,李发学,王学利
ZHAO Ming-Liang1,YU Jian-yong2,LI Fa-xue1,WANG Xue-Li 2(1.College of Textile

DOI: 10.16090/j.cnki.hcxw.2013.02.005

参考文献(References)：

• [1]Bouma K,Regelink M,Gaymans RJ.Crystallization of poly(ethyleneterephthalate)modified with codiols[J].Journal of Applied PolymerScience,2001,80:2 676.
• [2]Dadashian F,Montazer M,Ferdowsi S.Lipases improve the grafting ofpoly(ethylene terephthalate)fabrics with acrylic acid[J].Journal ofApplied Polymer Science,2010,116:203.
• [3]Dadsetan M,Mirzadeh H,Sharifi-Sanjani N.Surface modification ofpolyethylene terephthalate film by CO2 laser-induced graft copolymeriza-tion of acrylamide[J].Journal of Applied Polymer Science,2000,76:402.
• [4]Lee MS,Lee M,Wakida T,et al.Ozone-gas treatment of cationicdyeable polyester and poly(butylene terephthalate)fibers[J].Journal ofApplied Polymer Science,2007,104:2 423.
• [5]Pal SK,Gandhi RS,Kothari VK.Effect of comonomer on structureand properties of textured cationic dyeable polyester[J].Journal of Ap-plied Polymer Science,1996,61:401.
• [6]吕小芳.阳离子可染聚酯纤维的染色[J].印染,2006,32(20):23-24.
• [7]Guo XY,Gu LX,Feng XX.The glass transition,crystallization,andmelting characteristics of a class of polyester ionomers[J].Journal ofApplied Polymer Science,2002,86:3660.
• [8]Li G,Yang S,Jiang J,et al.The complicated influence of branching on crystallization behavior of poly(ethylene terephthalate)[J].Journal of Applied Polymer Science.2008,110:1649-1650.
• [9]Hsiao K J,Kuo J L,Tang J W,et al.Physics and kinetics of alkaline hydrolysis of cationic dyeable poly(ethylene terephthalate)(CDPET)and polyethylene glycol(PEG)-modified CDPET polymers:Effects of dimethyl 5-sulfoisophthalate sodium salt/PEG content and the number-average molecular weight of the PEG[J].Journal of Applied Polymer Science,2005,98:550.
• [10]陈放,方小兵,张大省.对苯二甲酸酯/聚乙二醇共聚醚酯的热性能研究[J].合成纤维,2011,40(12):10-11.
• [11]王秀华,王伟星,陈连,等.阳离子易染共聚酯的热性能研究[J].合成纤维工业,2011,34(1):27-28.
• [12]Finelli L,Fiorini M,Siracusa V,et al.Synthesis and characterization of poly(ethylene isophthalate-co-ethylene terephthalate)copolyesters[J].Journal of Applied Polymer Science,2004,92:189.
• [13]Chaouch W,Dieval F,Le Nouen D,et al.1 H-NMR spectroscopic study of the effect of aging vascular prostheses made of poly(ethylene terephthalate)on the macromolecular weight[J].Journal of Biomedical Materials Research Part A,2009,91A:939-952.
• [14]Chen B,Gu L.Isothermal crystallization and melting behavior of2-methyl-1,3-propanediol substituted sulfonated poly(ethylene terephtha-late)copolyesters[J].Journal of Applied Polymer Science,2010,117:2456.
• [15]Li FX,Xu XJ,Li Q,et al.Thermal degradation and their kinetics of biodegradable poly(butylene succinate-co-butylene terephthate)s under nitrogen and air atmospheres[J].Polymer Degradation and Stability,2006,91:1688.
• [16]Wei G,Hua D,Gu L.Thermal stability of poly(ethylene-co-trimethylene terephthalate)s[J].Journal of Applied Polymer Science,2006,101:3334.