High solid and high performance UV cured waterborne polyurethanes

被引:41
|
作者
Jung, Dong Hee [1 ]
Kim, Eun Young [2 ]
Kang, Young Soo [3 ]
Kim, Byung Kyu [1 ]
机构
[1] Pusan Natl Univ, Dept Polymer Sci & Engn, Pusan 609735, South Korea
[2] Pukyong Natl Univ, Inst Ind Sci & Technol, Pusan 609737, South Korea
[3] Sogang Univ, Dept Chem, Seoul 121742, South Korea
关键词
Waterborne polyurethane; Terminal ion; Imide; UV cure; SEGMENTED POLYURETHANES; AGGREGATION STRUCTURE; IMIDE COPOLYMERS; CHAIN EXTENSION; SOFT SEGMENTS; DISPERSIONS; NEUTRALIZATION; HYBRIDS; SILICA;
D O I
10.1016/j.colsurfa.2010.08.046
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
High solid and thermally stable waterborne polyurethanes (WPUs) were designed and synthesized by introducing imide groups into the hard segment and locating the anionic groups at the chain termini (terminal ions). It was found that the terminal ions gave rise to a much finer dispersion, higher dispersion stability and viscosity, whereas the conventional hard ions (those containing ionic groups in the hard segments) produced greater water swelling. Also, the terminal ions lead to a high-solid content (50%) at a low ionic content (2%), due to the effective exposure of the ionic groups to the particle surface, owing to the high mobility of the ionic groups and low free energy of the chain ends. When imide groups replaced urethane groups in the hard segment, remarkably enhanced mechanical, dynamic mechanical properties and thermal stability were obtained. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:58 / 63
页数:6
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