• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Active and passive smart structures and integrated systems; 20090309-12; San Diego, CA(US) >Swelling effect actuation of shape-memory polymer: mechanism and demonstration
【24h】

Swelling effect actuation of shape-memory polymer: mechanism and demonstration

机译：形状记忆聚合物的溶胀效应驱动：机理与论证

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recently, there is increasing interest in triggering shape recovery of shape-memory polymers (SMPs) by novel inductive effect. In this paper, many hard works have been carried out to make SMP induced while along with swelling effect. Based on the Free-volume theory, Rubber Elasticity Theory and Mooney-Rivlin Equation, it is theoretically and experimentally demonstrated the feasibility of SMP activated by swelling effect. The mechanism behind it is solvent acting as plasticizer, to reduce the glass transition temperature (Tg) and melting temperature (Tm) of polymers, make them softer and more flexible, facilitating the diffusion of the molecules to polymer chains, and then separating them. In addition to this physical action, the intermolecular interactions among the chains are weakened, because interactions are hindered at the points where the plasticizer is located. Finally, the Dynamic mechanical analysis (DMA), FTIR study and glass transition temperature measurement tests were used to exemplify the feasibility of SMP driven by swelling effect. And it is qualitatively identified the role of swelling effect playing in influencing the transition temperature. Swelling effect occurs due to the interaction between macromolecules and solvent molecules, leading to free volume of polymeric chains increasing (namely the flexibility of polymer chains increasing), resulting in the Tg decreasing. All above mentioned investigation can be used to confirm that the shape recovery is induced by swelling effect. This actuation almost is applicable for all the SMP and SMP composite, as the swelling theory is almost applicable for all the polymeric materials.
机译：近来，人们对通过新型感应效应触发形状记忆聚合物（SMP）的形状恢复越来越感兴趣。在本文中，已经进行了许多艰苦的工作来使SMP诱导同时溶胀。基于自由体积理论，橡胶弹性理论和Mooney-Rivlin方程，从理论和实验上证明了溶胀作用激活SMP的可行性。其背后的机理是溶剂充当增塑剂，以降低聚合物的玻璃化转变温度（Tg）和熔融温度（Tm），使其变得更柔软，更柔韧，从而促进了分子向聚合物链中的扩散，然后将它们分离。除了这种物理作用之外，链之间的分子间相互作用被削弱，因为在增塑剂所处的点处相互作用被阻碍。最后，使用动态力学分析（DMA），FTIR研究和玻璃化转变温度测量测试来证明溶胀效应驱动SMP的可行性。并且定性地确定了溶胀作用在影响转变温度中的作用。溶胀作用是由于大分子与溶剂分子之间的相互作用而发生的，导致聚合物链的自由体积增加（即聚合物链的柔韧性增加），从而导致Tg降低。所有以上提到的研究可以用来确认形状恢复是由溶胀作用引起的。这种驱动几乎适用于所有SMP和SMP复合材料，因为溶胀理论几乎适用于所有聚合物材料。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号