By Jinlian Hu
Form reminiscence fabrics are immensely helpful due to their power to get better their unique shapes upon publicity to an exterior stimulus comparable to warmth, moisture, mild or a magnetic box. This e-book stories key fresh learn healthy reminiscence polymers, their houses and purposes. issues contain the connection among morphological constructions and form reminiscence homes; excessive functionality Tg and Tm sort form reminiscence polymers; constructions of form reminiscence polymers with supramolecular switches; and the thermally-active and moisture-active form reminiscence impression of supermolecular form reminiscence polymers.
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Extra info for Advances in shape memory polymers
Yeung, K. , Liu, Y. , Liem, H. M. (2006b), Influence of ionic groups on the crystallization and melting behavior of segmented polyurethane ionomers, J. Appl. Polym. , 100, 4603–13. , Hu, J. , Yeung, L. , Ji, F. , Yeung, K. W. (2006c), Development of shape memory polyurethane fiber with complete shape recoverability, Smart Materials and Structures, 15, 1385–94. , et al. (2007a), Effect of steaming on shape memory polyurethane fibers with various hard segment contents, Smart Materials and Structures, 16, 969–81.
2002), Shape-memory polymers, Angew. Chem. Int. , 41, 2034–57. , Schmidt, A. , Langer, R. (2001), Ab-polymer networks based on oligo(εcaprolactone) segments showing shape-memory properties, PNAS, 98, 842. , Schmidt, A. , Langer, R. (2005), Shape-memory polymer networks from oligo(ε-caprolactone) dimethacrylates, J. Polym. , Polym. Chem. , 43, 1369. , Du, S. (2007), Electroactivate shape-memory polymer filled with nanocarbon particles and short carbon fibers, Appl. Phys. , 91, 144105. , Du, S. (2008a), Conductive nanoparticles in electro activated shape memory polymer sensor and actuator, Proceedings of SPIE – The International Society for Optical Engineering, vol.
2 presents the melting temperature Tm, heat of fusion (∆Hm) and Xc of the two phases. , 2005). It was found that Tm, ∆Hm and Xc of the soft phase decrease with the increase of HSC and drop abruptly when HSC ≤ 40%. This is ascribed to the increasing limitation imposed on soft segments. The Tm and ∆Hm of the hard phase increase with the increase of HSC, indicating an increase of fraction of the hard phase. In the foregoing DSC tests, the segmented polyurethanes with HSC ≤ 20% clearly show no endotherm of hard phase.
Advances in shape memory polymers by Jinlian Hu