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首页> 外文期刊>Journal of Applied Polymer Science >Shape-memory effects of radiation crosslinked poly(epsilon-caprolactone)
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Shape-memory effects of radiation crosslinked poly(epsilon-caprolactone)

机译：辐射交联聚ε-己内酯的形状记忆效应

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Poly(epsilon-caprolactone) (PCL) with different molecular weight were crosslinked by gamma-radiation. The radiation crosslinking features were analyzed by Soxhlet extraction with toluene and the Charlesby-Pinner equation. The crosslinking degree is relative to molecular weight and radiation dose; the relation between sol fraction and dose follows the Charlesby-Pinner equation. All the samples were crystalline at room temperature, and the radiation crosslinking had a little effect on the crystallinity and the melting behavior of PCL. The shape-memory results indicated that only those specimens that had a sufficiently high crosslinking degree (gel content is higher than about 10%) were able to show the typical shape-memory effect, a large recoverable strain, and a high final recovery rate. The response temperature of the recovery effect (about 55degreesC) was related to the melting point of the samples. The PCL shape-memory polymer was characterized by its low recovery temperature and large recovery deformation that resulted from the aliphatic polyester chain of PCL. (C) 2003 Wiley Periodicals, Inc. [References: 17]
机译：分子量不同的聚ε-己内酯（PCL）通过γ辐射交联。通过用甲苯的索氏提取和Charlesby-Pinner方程分析了辐射交联特征。交联度是相对于分子量和辐射剂量的。溶胶分数与剂量之间的关系遵循Charlesby-Pinner方程。所有样品在室温下均是结晶，并且辐射交联对PCL的结晶度和熔融行为几乎没有影响。形状记忆结果表明，只有那些具有足够高的交联度（凝胶含量高于约10％）的样品才能显示出典型的形状记忆效应，较大的可恢复应变和较高的最终回收率。恢复效果的响应温度（约55℃）与样品的熔点有关。 PCL形状记忆聚合物的特征在于其低恢复温度和PCL的脂族聚酯链导致的大恢复变形。 （C）2003 Wiley Periodicals，Inc. [参考：17]

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