In situ miniemulsion polymerization for waterborne polyurethanes: Kinetics and modeling of interfacial hydrolysis of isocyanate
In situ miniemulsion polymerization for waterborne polyurethanes: Kinetics and modeling of interfacial hydrolysis of isocyanate
复制标题
水性聚氨酯原位细乳液聚合：异氰酸酯界面水解的动力学和建模
DOI：
10.1016/j.colsurfa.2011.10.016
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发表时间：
2012-01
期刊：
影响因子：
--
通讯作者：
Chen, Fengqiu
中科院分区：
文献类型：
--
作者：
Zhang, Qinghua;Shi, Ying;Zhan, Xiaoli;Chen, Fengqiu
本文对微乳液聚合法直接合成水性聚氨酯的一个重要副反应异氰酸酯水解进行了实验和理论研究。考虑了在形成的聚合物中扩散的阻力和单体微乳液中的界面反应，建立了动力学模型。该模型从反应速率控制步骤出发，以反应程度作为时间的函数对水解过程进行定量研究。实验结果和文献报道的数据都很好地拟合了动力学模型。高反应活性的芳香族异氰酸酯的水解是一个扩散控制的快速反应过程，而中等反应活性的脂肪族异氰酸酯的水解是一个反应控制的过程。研究了脂肪族异氰酸酯在不同温度下的水解过程，也发现了一个反应控制的过程。
Isocyanates hydrolysis, an important side reaction in direct synthesis of waterborne polyurethanes by miniemulsion polymerization has been studied experimentally and theoretically in the paper. A kinetic model has been developed considering the resistances due to the diffusion through the formed polymer and interfacial reaction in monomer miniemulsion. This model studied the hydrolysis process quantitatively by reaction degree as a function of time in terms of the reaction rate-controlling step. Both experimental results and reported data from literatures fit the kinetic model well. It has been found that the hydrolysis of aromatic isocyanate with high reactivity is a diffusion controlled fast reaction process, while the hydrolysis of aliphatic isocyanate with moderate reactivity is a reaction-controlled process. The hydrolysis of aliphatic isocyanate at different temperatures has also been studied and it was also found a reaction-controlled process.
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DOI：
10.1002/pola.22577
发表时间：
2008-04
期刊：
Journal of Polymer Science Part A
影响因子：
--
作者：
Ying Shi;Xiao-li Zhan;Z. Luo;Qinghua Zhang;Feng-qiu Chen
通讯作者：
Ying Shi;Xiao-li Zhan;Z. Luo;Qinghua Zhang;Feng-qiu Chen
影响因子：
9.5
作者：
Leon M. Janssen;K. Nijenhuis
通讯作者：
Leon M. Janssen;K. Nijenhuis
DOI：
10.1016/j.colsurfa.2006.05.036
发表时间：
2006-11
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
影响因子：
--
作者：
H. Jeong;M. H. Lee;B. Kim
通讯作者：
H. Jeong;M. H. Lee;B. Kim
影响因子：
6.6
作者：
Tielemans, M;Roose, P;Vanovervelt, JC
通讯作者：
Vanovervelt, JC
影响因子：
3
作者：
Jin‐Lin Han;C. H. Yu;Yan‐Cheng Lin;K. Hsieh
通讯作者：
Jin‐Lin Han;C. H. Yu;Yan‐Cheng Lin;K. Hsieh