N-acetylating Hexamethylene-diamine Curing Reaction Kinetics

doi:10.3969/j.issn.1000-1565.2010.02.013

Abstract

Abstract: Diacetyl hexamethylene-diamine, a new chain extender, was prepared with hexamethylene-diamine, acetic acid and phosphoric for decreasing reaction activity of synthesizing polyurea. Micro-kjeldahl method, FTIR and ~1H-NMR were employed to characterize chemical structure of the synthetic product. Polyureas were synthesized using 4,4′-diphenyl diisocyanate and amine terminated poly (oxypropylene) with two different chain extenders. The gel time is prolonged, that is, the reaction activity is decreased when diacetyl hexamethylene-diamine is used as chain extender instead of hexamethylene-diamine. The kinetics of curing of polyurea reaction was studied by FTIR. The results show that the reaction belongs to the second-order reaction.

Key words: N-acetylating, hexamethylene-diamine, gel time, curing reaction

CLC Number:

TQ316.3 TQ323.8

LIU Zong-yu,SONG Wei,HAO Jing-mei,DENG Yu. N-acetylating Hexamethylene-diamine Curing Reaction Kinetics[J]. Journal of Hebei University (Natural Science Edition), 2010, 30(2): 171-175.

References

[1] ZHANG Qiang, ZHANG Pei-pei, JIAO Qing-ze. Synthesis and Characterization of Microcapsules with Chlorpyrifos Cores and Polyurea Walls [J]. 高等学校化学研究（英文版） 2006.
[2] 浦鸿汀, 刘泰, 杨正龙, 袁俊杰, PU Hong-ting, LIU Tai, YANG Zheng-long, YUAN Jun-jie. 聚脲的合成与应用 [J]. 高分子材料科学与工程 2008.doi:10.3321/j.issn:1000-7555.2008.07.001
[3] 陈旭东, 刘林, 汪加胜, CHEN Xu-dong, LIU Lin, WANG Jia-sheng. 喷涂聚脲弹性体的凝胶时间研究 [J]. 弹性体 2005.doi:10.3969/j.issn.1005-3174.2005.05.004
[4] 邓宇, 荆琪. 微波诱导催化合成四乙酰乙二胺的初步研究 [J]. 皮革化工 2003.doi:10.3969/j.issn.1674-0939.2003.02.006
[5] 李雪莲, 陈大俊, LI Xue-lian, CHEN Da-jun. 芳香族聚脲的合成与表征 [J]. 化学世界 2005.doi:10.3969/j.issn.0367-6358.2005.05.006
[6] 钟发春, 王晓川, 张晓华. IPN中聚氨酯固化反应动力学的FTIR研究 [J]. 化学推进剂与高分子材料 2004.doi:10.3969/j.issn.1672-2191.2004.03.008
[7] 李再峰, 张彤, 牛淑妍, 徐春明. FTIR法研究3, 5-二甲硫基-2, 4-/2, 6-二氨基甲苯二胺扩链剂的扩链动力学 [J]. 光谱学与光谱分析 2003.doi:10.3321/j.issn:1000-0593.2003.06.020
[8] 王敏捷, 张青, 李春子, 巴信武, WANG Min-jie, ZHANG Qing, LI Chun-zi, BA Xin-wu. 超支化不饱和聚(酰胺-酯)的改性及热分解动力学 [J]. 河北大学学报（自然科学版） 2007.doi:10.3969/j.issn.1000-1565.2007.03.018
[9] 王士财, WANG Shi-Cai. 氨酯改性聚异氰脲酸酯体系反应动力学 [J]. 应用化学 2005.doi:10.3969/j.issn.1000-0518.2005.10.017
[10] 黄微波. 喷涂聚脲弹性体技术 [M]. 北京:化学工业出版社 2005.
[11] 刘瑾, 李真, 罗筱烈. 不同软段结构对聚脲基氨酯扩链反应动力学的影响研究 [J]. 1997.