Preparation and properties of poly HTBN-based urethane--urea/organo reactive montmorillonite nanocomposites |
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Authors: | Zai-Feng LI Yuan WU Fu-Tao ZHANG Yu-Yang CAO Shou-Peng WU Ting WANG |
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Affiliation: | 1. State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China; 2. Oil Production Institute of Shengli Oilfield, Dongying 257001, China |
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Abstract: | With ultrasonic assistant mixing way, an intercalated mixture of polyol/organo reactive montmorillonite (ORMMT) was pretreated. The prepolymer composed MMT clay was prepared by reaction of polyol/ORMMT mixture with toluene diisocyanate (TDI). The resultant prepolymer reacted with extender (DMTDA) and then the polyurethane--urea/organo reactive montmorillonite (PUU/ORMMT) nanocomposites were obtained. The structure, morphology and properties of PUU/ORMMT nanocomposites were characterized by FT-IR, TEM, AFM, strain-stress machine, TGA, and dynamic mechanical analysis (DMA). The results showed that when the OMMT content is 3%, the PUU/ORMMT nanocomposities performed super mechanical properties. Because of the presence of ORMMT, both Tg of the soft segment and tanδ of the PUU increased, and the decomposition temperature for the first step and the second step increased respectively. TEM images showed that the organophilic MMT particles in the PUU composite exhibit a high degree of intercalation and exfoliation. |
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Keywords: | polyurethane--urea (PUU) organo-MMT morphology dynamic mechanical analysis (DMA) nanocomposite |
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