NOVEL POLYURETHANE/CLAY NANOCOMPOSITES WITH ULTRAHIGH ELONGATION AND UNIQUE MICROSTRUCTURE AT ORGANIC-INORGANIC INTERFACE
Polymer/clay nanocomposites exhibit unique physical and chemical properties typically not shared by their conventional macro- or micro-composite and have attracted much attention over the past decades. The final properties of nanocomposites are determined by the quality of the clay dispersion in the polymer matrix. Generally, inorganic filler addition in thermoplastic and thermosetting nanocomposites is accompanied by increased strength and stiffness at the expense of substantially reduced elongation at break. In this paper, a series of high-performance polyurethane (PU)/clay nanocomposites were prepared under mild and simple conditions, these novel nanocomposites exhibit ultrahigh elongation behavior without decrease of their strength. By using XRD and TEM techniques, the intercalation and exfoliation behavior of clay layers in these nanocomposites was verified. Especially, for the first time, an advanced solid-state NMR technique clearly reveals the presence of strong polymer-clay interaction and the unique microstructure at organic-inorganic interface which induces the ultrahigh elongation behavior of these nanocomposites. Alternatively, FTIR method was also used to study the influence of the clay sheets on the hydrogen bonding interaction in these nanocomposites. The correlations between the microstructure and mechanical properties of the prepared polyurethane/clay nanocomposites were then discussed.
Jianjun Zhu Tiehong Chen Pingchuan Sun Qinghua Jin Datong Ding An-Chang Shi
Key Laboratory of Functional Polymer Materials,Ministry of Education,College of Chemistry and Colleg Department of Physics and Astronomy,McMaster University,Hamilton,Ontario L8S 4M1,Canada
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
184-185
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）