[1]刘剑洪,李伦军.聚氨酯预聚物合成反应动力学研究[J].深圳大学学报理工版,1993,(1-2):62-68.
 Liu Jianhong and Li Lunjun.Studies on the Reaction Kinetics of NCO/OH in Preparing Polyurethane Prepolymer[J].Journal of Shenzhen University Science and Engineering,1993,(1-2):62-68.
点击复制

聚氨酯预聚物合成反应动力学研究()
分享到:

《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
期数:
1993年1-2期
页码:
62-68
栏目:
环境与能源
出版日期:
1993-06-30

文章信息/Info

Title:
Studies on the Reaction Kinetics of NCO/OH in Preparing Polyurethane Prepolymer
作者:
刘剑洪李伦军
深圳大学应用化学系
Author(s):
Liu Jianhong and Li Lunjun
Dept. of Appl. Chem., Shenzhen Univ.
关键词:
聚氨酯反应动力学支化核磁共振
Keywords:
PolyurethaneReaction KineticsBranch13C NMR
摘要:
本文提出了一种新的测试聚氯酯预聚物合成反应过程中氨酯化反应和支化反应的动力学参数的理论模型。通过化学定量分析4,4′—二苯基甲烷二异氰酸酯(MDI)与聚四甲撑醚二醇(PTMG)反应体系中的—NCO和—OH的浓度,分别获得了该体系的氨酯化反应和支化反应的速率常数的Arrhenius表达式: k1=27.17 exp(-19.79/RT) k2=5.886 ecp(-22.86/RT)在此基础上得到了支化概率Q与反应温度T、羟基转化率γ的关系: Q=0.2166 exp(-370.0/Y)γ/(1-γ)该结果与13C NMR所测得的结果相吻合。
Abstract:

A  new theoretical  model  to  study  the  reaction  kinetics  of  NCO  and  OH  in  preparing polyurethane prepolymer is proposed. The Arrhenius equations of urethane and branch reactions are obtained respectively as:

K1=27. 17exp( 19. 79/RT)

K2=5. 886exp( 22. 86/RT)

The relationship between branch probability Q and reaction temperature T and OH group shift ratio

y is derived as:

                  Q=0. 2166 exp( 370. 0/T)y/(1 y)

These results can be verified with 13C NMR.

相似文献/References:

[1]倪卓,杜学晓,王帅,等.UF微胶囊合成反应的动力学研究[J].深圳大学学报理工版,2011,28(No.3(189-282)):249.
 NI Zhuo,DU Xue-xiao,WANG Shuai,et al.Kinetics of synthesis of UF microcapsules[J].Journal of Shenzhen University Science and Engineering,2011,28(1-2):249.
[2]马睿,闫江龙,方琳,等.超临界水氧化去除污泥中化学需氧量的动力学[J].深圳大学学报理工版,2015,32(6):617.[doi:10.3724/SP.J.1249.2015.06617]
 Ma Rui,Yan Jianglong,Fang Lin,et al.Kinetics of removal of chemical oxygen demand in municipal sewage sludge by supercritical water oxidation[J].Journal of Shenzhen University Science and Engineering,2015,32(1-2):617.[doi:10.3724/SP.J.1249.2015.06617]
[3]吴奕光.主链改性聚醚聚氨酯电解质的合成与表征[J].深圳大学学报理工版,1993,(3-4):66.
 Wu Yiguang.Main Chain Modified Polyether-Urethanes Electrolytes[J].Journal of Shenzhen University Science and Engineering,1993,(1-2):66.
[4]李翠华,罗涛,张小雪,等.固体表面HTPB和TDI固化反应原位红外光谱分析[J].深圳大学学报理工版,2016,33(5):452.[doi:10.3724/SP.J.1249.2016.05452]
 Li Cuihua,Luo Tao,Zhang Xiaoxue,et al.In situ FT-IR spectroscopic studies of curing reaction of HTPB and TDI on solid surface[J].Journal of Shenzhen University Science and Engineering,2016,33(1-2):452.[doi:10.3724/SP.J.1249.2016.05452]
[5]刘剑洪,李伦军. 聚氨酯预聚物合成反应动力学研究(I)[J].深圳大学学报理工版,2003,20(4):14.
 LIU Jian-hong and LI Lun-jun.Studies on the Reaction Kinetics of NCO/OH in Preparing Polyurethane Prepolymer (I)[J].Journal of Shenzhen University Science and Engineering,2003,20(1-2):14.
[6]刘剑洪,逄艳,李伦军.聚氨酯合成反应动力学研究(II)[J].深圳大学学报理工版,2003,20(4):21.
 LIU Jian-hong,PANG Yan and LI Lun-jun.On the Reaction Kinetics of TDI and PPG (II)[J].Journal of Shenzhen University Science and Engineering,2003,20(1-2):21.

更新日期/Last Update: 2016-05-10