| Preparation and properties of PU/OMMT nanocomposites |
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| DOI： |
| Key Words: PU；OMMT；composite；tensile strength |
| Author Name | Affiliation | | WANG Jian-hua | China Academy of Engineering Physics | | TIAN Chun-rong | China Academy of Engineering Physics | | GU Yuan | China Academy of Engineering Physics | | ZHOU Qiu-ming | China Academy of Engineering Physics | | LIANG Shu-en | China Academy of Engineering Physics |
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| Abstract: |
| The PU/organic montmorillonite(OMMT) nanocomposites were prepared by one-step method and prepolymer method respectively.The influences of the dispersing method of OMMT in polytetrahydrofuran glycol(PTMG)，the addition level of OMMT and the preparing method of composite on the physical properties of nanocomposite were investigated.The results showed that both the high speed shearing dispersing method and the ultrosonic dispersing method could be used to intercalate the molecular chain of PTMG into the gallery between OMMT layers；the tensile strength of PU/OMMT nanocomposite prepared by prepolymer method was higher than that by one step method；the strength and toughness of PU/OMMT nanocomposite prepared by one-step method increased by using 0.5 phr OMMT；and the tensile strength and the elongation at break of nanocomposite increased by 54% and 19.4% respectively by using 7 phr DK1N?OMMT compared to those of PU. |
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