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Yang X.,Wuhan Naval University of Engineering | Yang X.,CAS Beijing Institute of Acoustics | Shuai C.G.,Wuhan Naval University of Engineering | Shuai C.G.,CAS Beijing Institute of Acoustics | And 2 more authors.
Materials Research Innovations | Year: 2015

This paper mainly investigates the creep property of polyurethane composites. The polyurethane composites with different structures are first prepared and experiments are subsequently carried out to study their creep property in terms of molecular weight of soft segments, isocyanate structure and cross-linking degree. The results show that the creep property gradually gets poorer with the increase of molecular weight of soft-segment polyols. The isocyanate molecule features a well-defined structure, and better anti-creep property of polyurethane materials can be observed in better orderly arranged molecular chains. Besides, higher cross-linking degree would lead to better anti-creep property of the polyurethane materials. As a result, the experimental result suggests a reasonable formula when designing to improve the anti-creep property of polyurethane materials. © W. S. Maney & Son Ltd 2015. Source


Shuai C.G.,Wuhan Naval University of Engineering | Shuai C.G.,CAS Beijing Institute of Acoustics | Yang X.,Wuhan Naval University of Engineering | Yang X.,CAS Beijing Institute of Acoustics | And 3 more authors.
Materials Research Innovations | Year: 2015

This paper explores the influence of polycaprolactone, which is commonly used in the production of polyurethane, on the mechanical properties of polyurethane composites. Polycaprolactone with different molecular weights and mixed chain extenders with different mixing proportions were analysed for this study. The results show that a multi-formula system had advantages over a single-formula, in that, multi-formula systems created an optimal overall balance among all indices of mechanical properties, and provided optimised integration of comprehensive mechanical properties. Therefore, a multi-formula system approach can be adopted for polyurethane composites to satisfy usage requirements of a high-performance vibration isolator with respect to comprehensive mechanical properties, such as tensile, tear and creep properties. © W. S. Maney & Son Ltd 2015. Source


Yu W.X.,Wuhan Naval University of Engineering | Yang S.L.,Naval Aviation Military Representative Office in Chengdu District | Yang X.,University of Sichuan
Applied Mechanics and Materials | Year: 2013

The performance of magnetorheological (MR) elastomers can be controlled by an applied field, so we can design intelligent isolators with adjustable and controllable parameters. All isolators more or less suffer from creep deformation, and the intensity will directly affect the service life of the equipment to be isolated. In this paper, NDI polyurethane-based MR elastomers were prepared and their creep properties were tested. The results show that as the filling mass fraction of carbonyl iron powder was increasing, the creep intensity in MR elastomers was first increased and then reduced; when the mass fraction was 70%, the creep intensity was less than that of the base material. Therefore, the creep property of MR elastomers can be improved by designing an appropriate content of carbonyl iron powder according to use requirement. © (2013) Trans Tech Publications, Switzerland. Source

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