Mechanical properties of supramolecular elastomers prepared from polymer-grafted polyrotaxane
Mechanical properties of supramolecular elastomers prepared from polymer-grafted polyrotaxane
复制标题
DOI：
10.1016/j.polymer.2017.02.090
复制
发表时间：
2017-10-16
期刊：
影响因子：
4.6
通讯作者：
Ito, Kohzo
中科院分区：
文献类型：
--
作者：
Minato, Kosuke;Mayumi, Koichi;Ito, Kohzo
通过交联聚合物接枝聚轮烷制备了无溶剂超分子滑环弹性体，其中聚己内酯侧链与α-环糊精（CD）连接在聚乙二醇（PEG）轴向线性链上。SR弹性体中的交联能够响应于所施加的应力而沿主链沿着滑动。将具有不同交联密度的SR弹性体的机械性能与由PCL接枝羟丙基纤维素（HPC）制备的固定交联（FC）弹性体的机械性能进行比较，以了解可滑动交联的影响。发现SR弹性体在大应变下经历较少的应变硬化，并且在断裂时表现出比具有相同杨氏模量的常规FC弹性体更高的应变。(C)2017爱思唯尔有限公司版权所有。
Supramolecular slide-ring (SR) elastomers without solvent were fabricated by cross-linking of polymer-grafted polyrotaxane in which alpha-cyclodextrins (CDs) with poly-epsilon-caprolactone (PCL) side chains are threaded on a polyethylene glycol (PEG) axial linear chain. The cross-links in the SR elastomers are capable of sliding along the backbone in response to applied stress. Mechanical properties of the SR elastomers with different cross-linking densities were compared with those of fixed cross-link (FC) elastomers prepared from PCL-grafted hydroxypropyl cellulose (HPC) to understand the influence of the slidable cross-links. The SR elastomers are found to undergo less strain-hardening at large strains and demonstrate higher strains at break than the conventional FC elastomers with the same Young's moduli. (C) 2017 Elsevier Ltd. All rights reserved.