Poly(epsilon-caprolactone) polyurethane and its shape-memory property | |
Ping, P; Wang, WS; Chen, XS; Jing, XB | |
刊名 | BIOMACROMOLECULES
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2005-03-01 | |
卷号 | 6期号:2页码:587-592 |
ISSN号 | 1525-7797 |
DOI | 10.1021/bm049477j |
英文摘要 | A series of segmented poly(epsilon-caprolactone) polyurethanes (PCLUs) were prepared from poly(epsilon-caprolactone) (PCL) diol, 2,4-toluene diisocyanate and ethylene glycol. The molecular weight (M-n) of PCL was 50010 000, and the soft-to-hard molar ratio was 1:2 to 1:6. Their shape-memory behaviors were investigated as a function of PCL molecular weight, PCLU composition, and thermal/mechanical history. When a deformation temperature 15-20 degrees C below T-m was chosen, the lowest recovery temperature (LRT) was 15-18 degrees C below T-m and the recovery ratio was 94-100% for tensile deformation of 300% and for compression of 2.7-fold. The reasons for this deformation-recovery procedure and the mechanism for this shape recovery below T-m were discussed. The shape recovery was associated with the premelting of the crystals formed during the deformation and fixation, and, thus, it could be accomplished in the solid state. Its driving force was the inner stress stored in the deformed specimen during deformation and crystallization. Therefore, the LRT was a more practical temperature for shape-memory PCLU than T-m. It could be conveniently measured by means of thermal mechanical analysis. By adjusting the molecular weight of the PCL diol and the hard-to-soft ratio, the LRT of PCLU Could be adjusted to the range of 37-42 degrees C, and reasonable rigidity could be retained after shape recovery, fulfilling the essential requirements of medical implantations. |
语种 | 英语 |
出版者 | AMER CHEMICAL SOC |
WOS记录号 | WOS:000227687800010 |
内容类型 | 期刊论文 |
源URL | [http://ir.iccas.ac.cn/handle/121111/56225] ![]() |
专题 | 中国科学院化学研究所 |
通讯作者 | Jing, XB |
作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
推荐引用方式 GB/T 7714 | Ping, P,Wang, WS,Chen, XS,et al. Poly(epsilon-caprolactone) polyurethane and its shape-memory property[J]. BIOMACROMOLECULES,2005,6(2):587-592. |
APA | Ping, P,Wang, WS,Chen, XS,&Jing, XB.(2005).Poly(epsilon-caprolactone) polyurethane and its shape-memory property.BIOMACROMOLECULES,6(2),587-592. |
MLA | Ping, P,et al."Poly(epsilon-caprolactone) polyurethane and its shape-memory property".BIOMACROMOLECULES 6.2(2005):587-592. |
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