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Citation: XU Hengzhi, WANG Huan, DAI Zhen, HUANG Yiping, XU Gewen. Synthesis and Properties of Waterborne Polyurethane Based Tetramethyl Xylene Diisocyanate[J]. Chinese Journal of Applied Chemistry, ;2012, 29(6): 623-627. doi: 10.3724/SP.J.1095.2012.00325 shu

Synthesis and Properties of Waterborne Polyurethane Based Tetramethyl Xylene Diisocyanate

1.
School of Chemistry and Chemical Engineering, Anhui University;Anhui Key Laboratory of Environment-friendly Polymer Materials, Hefei 230039, China

Corresponding author: XU Gewen,
Received Date: 22 July 2011
Available Online: 11 October 2011
Fund Project: 安徽大学研究生学术创新研究资助项目(Y9h090029) (Y9h090029)

A series of waterborne polyurethane(WPU) dispersions with different molar ratio of -NCO to -OH(n(-NCO)/n(-OH)) were synthesized using tetramethyl xylene diisocyanate(TMXDI),polyester diol and dimethylolpropionic acid as raw materials.The effect of n(-NCO)/n(-OH) on the properties of WPU was investigated.The experiment results showed that with the increase of n(-NCO)/n(-OH),the particle size increased while the particle size distribution became wider;the crystallinity,thermostability and the water resistance tend to decrease as well.When n(-NCO)/n(-OH) was 3.0,the particle size of WPU based TXMDI was fallen in the range of 10 to 30 nm,the decomposition temperature and 24 h water absorption of WPU film were 275℃ and below 10%,respectively.
- waterborne polyurethane,
- tetramethyl xylene diisocyanate,
- thermal properties,
- water resistance
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