期刊
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
卷 28, 期 4, 页码 773-780出版社
WUHAN UNIV TECHNOLOGY
DOI: 10.1007/s11595-013-0767-5
关键词
waterborne polyurethane; supramolecular nanoplatelets; polyrotaxane; cyclodextrin inclusion; composites; mechanical properties
资金
- National Natural Science Foundation of China [20404014, 50843031]
- Fundamental Research Funds for the Central Universities (Self-Determined and Innovative Research Funds of WUT) [2012-Ia-006]
New composites of waterborne polyurethane (WPU) as a matrix were prepared by incorporating rigid supramolecular nanoplatelets (SNs) as filler, which were self-assembled by the selective inclusion of beta-cyclodextrin (beta-CD) onto poly(propylene oxide) (PPO) segment in the poly(ethylene oxide)-block-PPO-block-poly(ethylene oxide) (PEO-b-PPO-b-PEO). It is worth noting that, when the loading level of SN is lower than 3wt%, the SNs with moderate PEO length result in the simultaneous increase in strength, elongation and Young's modulus in contrast with neat WPU. If there is no stretching free PEO chain, both strength and elongation decrease in spite of an increase in Young's modulus. However, too long PEO chains result in the decrease of mechanical performances while the relatively higher loading-level of SNs also inhibits the enhancement of strength and elongation.
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