Synthesis and characterization of low crystalline waterborne polyurethane for potential application in water-based ink binder
Synthesis and characterization of low crystalline waterborne polyurethane for potential application in water-based ink binder
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DOI：
10.1016/j.porgcoat.2013.08.004
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发表时间：
2014-01-01
影响因子：
6.6
通讯作者：
Hu, Jingbo
中科院分区：
文献类型：
--
作者：
Fang, Changqing;Zhou, Xing;Hu, Jingbo
以聚丙二醇（PPG）、异佛尔酮二异氰酸酯（IPDI）、二羟甲基丙酸（DMPA）为原料，采用预聚体异氰酸酯法和丙酮法相结合的环保、简单的工艺合成了低结晶度、纳米粒子分布窄的水性聚氨酯分散体（PUD）。对于用作油墨粘合剂，对PUD的酸值进行了分析。结果表明，酸值随固含量的变化而变化，主要随硬段/软段摩尔比的增加而增加。采用傅里叶变换红外光谱（FTIR）、核磁共振氢谱（H-1 NMR）、透射电子显微镜（TEM）、差示扫描量热法（DSC）、热重分析（TG）、X射线衍射（XRD）和偏光显微镜（POM）等手段对PUD的结构和热性能进行了表征。结果表明，采用该工艺合成的纳米级水性聚氨酯分散体具有较好的热稳定性和较弱的结晶性，适合于水性油墨连接料的使用。当硬段/软段摩尔比为4或5时，PUD的性能可以被优化用于作为油墨粘合剂的应用。皇冠版权所有（C）2013由爱思唯尔B. V.出版保留所有权利。
Waterborne polyurethane dispersions (PUDs) with low crystallization and narrow nanoparticles distribution were synthesized from poly(propylene glycol) (PPG), isophorone diisocyanate (IPDI), dimethylolpropionic acid (DMPA) via a environmental and simple process combined prepolymer isocyanate process with acetone process. For used as ink binder, the acid numbers of PUDs were analyzed. It was found that the acid number changed with the solid content and mainly increased with increasing hard-/soft-segment molar ratio. Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic resonance spectroscopy (H-1 NMR), transmission electron microscope (TEM), differential scanning calorimetry (DSC), thermogravimetric (TG), X-ray diffractometer (XRD) and polarizing optical microscopy (POM) measurements were utilized to characterize the bulk structures and thermal properties of PUDs. The results show that nanoscale waterborne polyurethane dispersions synthesized through the combined process have good thermal stability and weakly crystallinity, which is suitable for the use of water-based ink binder. The performance of PUDs can be optimized for the application as ink binder when the hard-/soft-segment molar ratio is 4 or 5. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.