Shape memory polyurethane polymer fibers

Presently, the study of shape memory polyurethane (SMPU) has been widely conducted. For common elastic fibers, the elasticity should be defined as the instant recoverability of the length on release of the deforming stress. The recovery in shape memory fibers is the ability of deformed fibers to recover under external stimulus such as heat or chemicals. In this case, the external stimulus is a must. Figure 3.1 shows the net-points and switches which response to the stimulus (Hu et al., 2012). The elongation of shape memory polymer fiber are a little less than spandex, but mechanical... 

Healing of Thermosetting Polymer by Embedded Unidirectional (1-D) Shape Memory Polyurethane Fiber (SMPF)... 

Huang H., Zhang D., Wang T.J., Mao Z.P., Yu W.D. and Yan H.J. (2007), Influence of hard segment content on the water vapor permeabUity of segmented shape memory polyurethane membranes. Proceedings of the 2007 International Conference on Advanced Fibers and Polymer Materials, 1-2 ... 

Tobushi, H., Hara, H., Yamada, E., Hayashi, S. (1996), Thermo-mechaiucal properties in a thin film of shape memory polymer of polyurethane series. Smart Mater. Struct., 5,483. Zhu, Y, Hu, J. L., Yeung, L. Y, Liu, Y, Ji, F. L., Yeung, K. W. (2006), Development of shape memory polyurethane fiber with complete shape recoverability. Smart Materials and Structures, 15, p. 1385-94. 

Manufacture of and shape memory polyurethane (SMPU) polymer fibers... 

Meng Q, et al. Polycaprolactone-based shape memory segmented polyurethane fiber. J Appl Polym Sci 2007 106 2515-23. 

Meng Q.H., Hu J., Zhu Y, Lu J. and Liu Y. (2007), Polycaprolactone-based shape memory segmented polyurethane fiber. Journal of Applied Polymer Science, 106 pp. 2515-2523. 

Kaursoin, J., Agrawal, A. K. (2007), Melt spun thermoresponsive shape memory fibers based on polyurethanes Effect of drawing and heat-setting on fiber morphology and properties, J. Appl. Polym. Set, 1(13,2172-82. 

Gupta, V. B. (1997), Manufactured Fiber Technology, first edn, London Chapman Hall. Hu, J. L., Ji, F. L., Wong, Y. W. (2005a), Dependency of the shape memory properties of a polyurethane upon thermomechanical cyclic conditions, Polym bit, 54,600-5. 

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