Shape memory and mechanical properties of cross-linked polyethylene/clay nanocomposites |
| |
Authors: | Sayena Rezanejad |
| |
Institution: | Polymer Engineering Group, Chemical Engineering Department, Faculty of Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Islamic Republic of Iran |
| |
Abstract: | Shape memory polymer (SMP) such as cross-linked low-density polyethylene (XLDPE), can return from its temporary shape to the original (permanent) shape upon heating. SMP in comparison with shape memory alloy (SMA) and shape memory ceramic (SMC) has lower stiffness, so generates lower recovery force when it is being used as an actuator. Also, when SMP is reinforced with traditional micro-fillers, it often loses its shape memory effect due to the high weight fraction of filler (20-30%). To overcome these disadvantages, nanoclays can be used. The smart resultant nanocomposite, even in small clay loading level (0-10 wt.%), shows higher modulus, strength, and the other physical properties such as higher recovery force, required to act as an actuator.In this work, the effect of modified montmorillonite on mechanical and shape memory properties as well as the force generation of a shape memory cross-linked low density polyethylene were investigated.The results show that the modulus of elasticity, the recovery temperature, the recovery force and force recovery rate increase with increasing organoclay in nanocomposites, but final recovery strain decreases slightly. |
| |
Keywords: | Nanocomposite Shape memory effect Low density polyethylene Organoclay Actuator Smart polymer |
本文献已被 ScienceDirect 等数据库收录! |
|