以等物质的量比的间苯二甲酸（A2型单体）和三羟甲基丙烷（B3型单体）为原料,采用熔融聚合工艺制备了一种具有芳香-脂肪骨架的新型超支化聚酯（HBPE）。利用红外光谱、核磁共振、凝胶渗透色谱和热分析等手段对HBPE进行了表征。同时对合成HBPE的反应动力学进行了研究,建立了适合该体系的反应动力学方程,实验结果与理论研究符合良好。研究结果表明,该缩聚反应为外加酸的催化反应过程,反应级数为二级,反应速率由羧基浓度和羟基浓度共同决定。
A new hyperbranched polyester（HBPE） with aromatic-aliphatic skeleton was prepared by melt polymerization of isophthalic acid（A2 type monomer） and trimethylolpropane（B3 type monomer） with equimolar ratio,and the HBPE was characterized using Fourier transform infrared spectroscopy,nuclear magnetic resonance,gel permeation chromatography and thermal analyzer.A suitable kinetics equation of the system was established.It is found that the experimental results are in good agreement with theory.The research results show that the reaction is a second order.The condensation reaction is a acid-catalyzed process,and reaction rate is decided by the concentrations of carboxyl and hydroxyl together.
参考文献
| [1] | C.Gao;D.Yan .Hyperbranched polymers:from synthesis to applications[J].Progress in Polymer Science,2004(3):183-275. |
| [2] | Voit B .Hyperbranched polymers - All problems solved after 15 years of research?[J].Journal of Polymer Science, Part A. Polymer Chemistry,2005(13):2679-2699. |
| [3] | Jianda Xie;Lihua Hu;Wenfang Shi .Synthesis and characterization of hyperbranched polytriazole via an 'A2+ B3' approach based on click chemistry[J].Polymer international,2008(8):965-974. |
| [4] | 张新荔,许培俊.A2+B3体系制备超支化聚合物的研究进展[J].石化技术与应用,2009(04):365-369. |
| [5] | 张新荔,高治,井新利.Boltorn型超支化聚酯的合成与表征[J].应用化工,2009(04):567-571. |
| [6] | Zagar E.;Zigon M. .Characterization of a commercial hyperbranched aliphatic polyester based on 2,2-bis(methylol)propionic acid[J].Macromolecules,2002(27):9913-9925. |
| [7] | Malmstrom E.;Hult A. .KINETICS OF FORMATION OF HYPERBRANCHED POLYESTERS BASED ON 2,2-BIS(METHYLOL)PROPIONIC ACID[J].Macromolecules,1996(4):1222-1228. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%