文献类型：期刊文献

英文题名：Crosslinking Reaction and Properties of Two-Component Waterborne Polyurethane from Terpene-Maleic Ester Type Epoxy Resin

作者：Wu, Guo-min[1,2,3,4] Kong, Zhen-wu[1,2,3,4] Chen, Cai-feng[1,2,3,4] Chen, Jian[1,2,3,4] Huo, Shu-ping[1,2,3,4] Jiang, Jian-chun[1,2,3,4]

第一作者：吴国民;Wu, Guo-min

通信作者：Wu, GM[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China;[2]Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[3]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Jiangsu, Peoples R China;[4]State Forestry Adm, Key & Open Lab Forest Chem Engn, Nanjing 210042, Jiangsu, Peoples R China

年份：2013

卷号：128

期号：1

起止页码：132-138

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20130415921802);Scopus(收录号：2-s2.0-84872356890);WOS:【SCI-EXPANDED(收录号:WOS:000314924700017)】；

基金：The work was supported by National Natural Science Foundation of China, grant number 30972320.

语种：英文

外文关键词：polyurethanes; resins; water-soluble polymers

摘要：A two-component waterborne polyurethane (2K-WPU) is prepared with the terpene-maleic ester type epoxy resin-based polyol dispersion and a hydrophilically modified hexamethylene diisocyanate tripolymer. Laser particle size analyzer and transmission electron microscopy are used to characterize the particle size distribution and the micromorphology of the 2K-WPU. Crosslinking reaction kinetics of the 2K-WPU is examined by fourier transform infrared spectrometry (FTIR) spectra. In the preliminary stage of the crosslinking reaction, it shows a very good fit with a second order reaction kinetics, and the apparent activation energy is 94.61 kJ mol(-1). It is also shown from the FTIR spectra that the complete crosslinking reaction of the 2K-WPU needs 7 h at 70 degrees C. The crosslinked products of the 2K-WPU have good thermal resistant properties, with glass-transition temperatures (T-g) in the range of 35-40 degrees C and 10% weight loss temperatures (T-d) in the range of 275-287 degrees C. The films obtained from the crosslinked products have good water-resistance, antifouling, blocking resistance properties and impact strength of >50 cm, flexibility of 0.5 mm, adhesion of 1 grade, pencil hardness of HB-2H. The pencil hardness and thermal-resistant properties of the crosslinked products increase with the molar ratio of isocyanate (-NCO) group to hydroxyl (-OH) group. (C) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 128: 132-138, 2013