11 Wischke C, Lendlein A. Shape-memory polymers as drug carriers—A multifunctional system. Pharm Res, 2010, 27: 527-529？？
[2]
12 Meng Q H, Hu J L, Mondal S. Thermal sensitive shape recovery and mass transfer properties of polyurethane/modified MWNT compositemembranes synthesized via in situ solution pre-polymerization. J Membrane Sci, 2008, 319: 102-110？？
[3]
14 Inomata K, Nakagawa K, Fukuda C, et al. Shape memory behavior of poly(methyl methacrylate)-graft-poly(ethylene glycol) copolymers.Polymer, 2010, 51: 793-798？？
[4]
16 Ahir S V, Tajbakhsh A R, Terentjev E M. Self-assembled shape-memory fibers of triblock liquid-crystal polymers. Adv Funct Mater,2006, 16: 556-560？？
[5]
17 Ishida K, Yoshie N. Two-way conversion between hard and soft properties of semicrystalline crosslinked polymer. Macromolecules, 2008,41: 4753-4757？？
20 Langer R, Tirrell D A. Designing materials for biology and medicine. Nature, 2004, 428: 487-492？？
[8]
23 Li F, Zhang X, Hou J, et al. Studies on thermally stimulated shape memory effect of segmented polyurethanes. J Appl Polym Sci, 1997, 64:1511-1516？？
[9]
24 Meng Q H, Hu J L. A review of shape memory polymer composites and blends. Compos Pt A-Appl Sci Manuf, 2009, 40: 1661-1672？？
[10]
27 Wang W S, Ping P, Chen X S, et al. Shape memory effect of poly(L-lactide) based polyurethanes with different hard segments. Polym Int,2007, 56: 840-846？？
[11]
29 Cohn D, Salomon A H. Designing biodegradable multiblock PCL/PLA thermoplastic elastomers. Biomaterials, 2005, 26: 2297-2305？？
[12]
30 Behl M, Lendlein A. Shape-memory polymers. Mater Today, 2007, 10: 20-28
[13]
32 Cheung H Y, Lau K T, Lu T P, et al. A critical review on polymer-based bio-engineered materials for scaffold development. Compos PtB-Eng, 2007, 38: 291-300？？
[14]
33 Wang Y L, Huang M N, Luo Y F, et al. In vitro degradation of poly(lactide-co-p-dioxanone)-based shape memory poly(urethaneeurea).Polym Degrad Stabil, 2010, 95: 549-556？？
[15]
37 Lendlein A, Zotzmann J, Feng Y K, et al. Controlling the switching temperature of biodegradable, amorphous, shape-memorypoly(rac-lactide)urethane networks by incorporation of different comonomers. Biomacromolecules, 2009, 10: 975-982？？
[16]
38 Meng Q H, Hu J L, Chen S J. The shape memory properties of biodegradable chitosan/poly(L-lactide) composites. Polym Environ, 2009,17: 212-224？？
[17]
40 Wang W, Jin Y, Su Z H, et al. Structure evolution in segmented poly(ester urethane) in shape-memory process. Macromolecules, 2010, 43:2942-2947？？
[18]
41 Yang Z H, Hu J L, Liu Y Q, et al. The study of crosslinked shape memory polyurethanes. Mater Chem Phys, 2006, 98: 368-372？？
[19]
42 Lendlein A, Jiang H, Junger O, et al. Light-induced shape-memory polymers. Nature, 2005, 434: 879-882？？
[20]
1 Charlesby A. Cross-linking of polythene by pile radiation. Proc R Soc Lond A, 1952, 215: 187-214？？
[21]
2 Cai W, Liu L L. Shape-memory effect of poly(glycerol-sebacate) elastomer. Mater Lett, 2008, 62: 2171-2173？？
[22]
3 Wong Y S, Venkatraman S S. Recovery as a measure of oriented crystalline structure in poly(L-lactide) used as shape memory polymer.Acta Mater, 2010, 58: 49-58？？
[23]
4 Zhu G M, Xu S G, Wang J H, et al. Radiation physics and shape memory behaviour of radiation-crosslinked PCL/PMVS blends. Chemistry,2006, 75: 443-448
[24]
5 Zheng X T, Zhou S B, Li X H, et al. Shape memory properties of poly(D,L-lactide)/hydroxyapatite composites. Biomaterials, 2006, 27:4288-4295？？
[25]
6 Wischke C, Neffe A T, Steuer S, et al. Evaluation of a degradable shape-memory polymer network as matrix for controlled drug release. JControl Release, 2009, 138: 243-250？？
[26]
7 Deka H, Karak N, Kalita R D, et al. Biocompatible hyperbranched polyurethane/multi-walled carbon nanotube composites as shapememory materials. Carbon, 2010, 48: 2013-2022？？
[27]
8 Wang W S, Ping P, Chen X S, et al. Polylactide-based polyurethane and its shape-memory behavior. Eur Polym J, 2006, 42: 1240-1249？？
[28]
9 Yang J, Liu F, Yang L, et al. Hydrolytic and enzymatic degradation of poly(trimethylene carbonate-co-D,L-lactide) random copolymerswith shape memory behavior. Eur Polym J, 2010, 46: 783-791？？
[29]
10 Yakacki C M, Shandas R, Safranski D, et al. Strong, tailored, biocompatible shape-memory polymer networks. Adv Funct Mater, 2008, 18:2428-2435？？
[30]
13 Liu C, Qin H, Mather P T. Review of progress in shape-memory polymers. J Mater Chem, 2007, 17: 1543-1558？？
[31]
15 Rabani G, Luftmann H, Kraft A. Synthesis and characterization of two shape-memory polymers containing short aramid hard segmentsand poly(3-caprolactone) soft segments. Polymer, 2006, 47: 4251-4260？？
[32]
19 Koerner H, Price G, Pearce N A, et al. Remotely actuated polymer nanocomposites-stress-recovery of carbon-nanotube-filled thermalplasticelastomers. Nat Mater, 2004, 3: 115-120？？
[33]
21 Cuevas J M, Alonso J, German L, et al. Magneto-active shape memory composites by incorporating ferromagnetic microparticles in athermo-responsive polyalkenamer. Smart Mater Struct, 2009, 18: 075003？？
[34]
22 Zhang H, Wang H T, Zhong W, et al. A novel type of shape memory polymer blend and the shape memory mechanism. Polymer, 2009, 50:1596-1601？？
[35]
25 Debdatta R J, Karger K. Recent advances in shape memory polymers and composites: A review. Mater Sci, 2008, 43: 254-269？？
[36]
26 Sakurai S, Yoshida H, Hashimoto F, et al. Ultra small-angle X-ray scattering studies on structural changes in micrometers upon uniaxialstretching of segmented polyurethaneureas. Polymer, 2009, 50: 1566-1576？？
[37]
28 Chen S J, Hu J L, Zhuo H T, et al. Study on the thermal-induced shape memory effect of pyridine containing supramolecular polyurethane.Polymer, 2010, 51: 240-248？？
[38]
31 Zini E, Scandola M. Shape memory behavior of novel (L-lactide-glycolide-trimethylene carbonate) terpolymers. Biomacromolecules,2007, 8: 3661-3667？？
[39]
34 Zhang W, Chen L, Zhang Y. Surprising shape-memory effect of polylactide resulted from toughening by polyamide elastomer. Polymer,2009, 50: 1311-1315？？
[40]
35 Min C C, Cui W J, Bei J Z, et al. Biodegradable shape-memory polymer—Polylactide-co-poly(glycolide-co-caprolactone) multiblock copolymer.Polym Adv Technol, 2005, 16: 608-615？？
[41]
36 Liu Y P, Gall K, Dunn M L, et al. Thermomechanics of shape memory polymer nanocomposites. Mech Mater, 2004, 36: 929-940？？
[42]
39 Zhuo H T, Hu J L, Chen S J. Electrospun polyurethane nanofibres having shape memory effect. Mater Lett, 2008, 62: 2074-2076？？
[43]
43 Chen S J, Hu J L, Zhuo H T, et al. Two-way shape memory effect in polymer laminates. Mater Lett, 2008, 62: 4088-4090？？
[44]
44 Mantovani D. Shape memory alloys: Properties and biomedical applications. Smart Mater, 2000, 52: 36-44
[45]
45 Kolesov I S, Kratz K, Lendlein A, et al. Kinetics and dynamics of thermally-induced shape-memory behavior of crosslinked short-chainbranched polyethylenes. Polymer, 2009, 50: 5490-5498？？
[46]
46 Zhong Q, Ren J, Wang Q F. Preparation and characterization of polylactide-block-poly(butylene adipate) polyurethane thermoplasticelastomer. Polym Eng Sci, 2011, 51: 908-916？？
