• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer: The International Journal for the Science and Technology of Polymers >Improved dielectric and actuated performance of thermoplastic polyurethane by blending with XNBR as macromolecular dielectrics
【24h】

Improved dielectric and actuated performance of thermoplastic polyurethane by blending with XNBR as macromolecular dielectrics

机译：通过用XNBR与XNBR作为大分子电介质来改进热塑性聚氨酯的介电和致动性能

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

In the present study, carboxylated nitrile rubber (XNBR) with high dielectric constant (epsilon(r)) and low elastic modulus (Y) was introduced into thermoplastic polyurethane (TPU) with good mechanical properties to prepare macroscopic homogeneous high performance dielectric elastomer (DE) blends. The results show that the XNBR macromolecules can disrupt the N-H/C = O hydrogen bonds of TPU, leading to the increase in dipole polarizability of TPU matrix. On the other hand, the formation of hydrogen bonds between XNBR and TPU increases the interfacial interaction and thus the interfacial polarizability of XNBR/TPU blends. The improvement of both the dipole polarizability and the interfacial polarizability result in the significant improvement of epsilon(r) of TPU with increasing the content of XNBR. Meanwhile, the Y of TPU is decreased due to the disruption of hydrogen bonds of TPU and the softening effect of XNBR. The simultaneous increase in epsilon(r) and decrease in Y of TPU results in the large increase in electromechanical sensitivity (beta) and actuated strain at low electric field of XNBR/TPU blends. Interestingly, the epsilon(r) at 10(3) Hz, the beta and the actuated strain at certain electrical field of the blend with XNBR/TPU blending ratio of 80/20 is even higher than that of pure XNBR, which is attributed to the co-continuous structure of this blend as well as the synergetic effect of the increase in dipole polarizability of both TPU and XNBR and the increase in interfacial polarizability. Comparing with our previous study on TPU DE blend by adding low molecular weight plasticizer, XNBR/TPU macromolecular DE blend show better overall performance such as higher mechanical strength, higher breakdown strength and better stability, thus are more likely to be applied in biological and medical fields, where a low electric field is required.
机译：在本研究中，将具有高介电常数（ε（R））和低弹性模量（Y）的羧化丁腈橡胶（XNBR）引入热塑性聚氨酯（TPU）中，具有良好的机械性能，以制备宏观均匀高性能介电弹性体（DE ）混合。结果表明，XNBR大分子可以破坏TPU的N-H / C = O氢键，导致TPU基质的偶极极化性的增加。另一方面，XNBr和TPU之间的氢键的形成增加了界面相互作用，从而增加了XNBR / TPU混合物的互加极化性。偶极极化性和界面极化性的改善导致TPU随着XNBR含量的显着改善TPU的显着改善。同时，由于TPU的氢键和XNBR的软化效果，TPU的Y降低。 ε（R）同时增加，TPU的y降低导致XNBr / TPU混合物低电场的机电敏感性（β）和致动应变的大幅增加。有趣的是，在与XNBr / TPU混合比的情况下，10（3）Hz，β和致动菌株的ε在10（3）Hz，致动菌株为80/20的XNBr / TPU混合比的情况下甚至高于纯XNBR的电场，归因于该混合物的共同结构以及TPU和XNBR的偶极极化性增加的协同作用以及界面极化性的增加。与先前通过加入低分子量增塑剂的TPU De混合物的研究相比，XNBr / TPU大分子de混合物表现出更好的整体性能，如更高的机械强度，更高的击穿强度和更好的稳定性，因此更有可能应用于生物和医学需要低电场的字段。

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