Effect of strain hardening of shape memory polymer fibers on healing efficiency of thermosetting polymer composites

被引：82
作者：
Li, Guoqiang [1 ,2 ]
Ajisafe, Oludayo [2 ]
Meng, Harper [1 ,2 ]
机构：
[1] Louisiana State Univ, Dept Mech & Ind Engn, Baton Rouge, LA 70803 USA
[2] Southern Univ, Dept Mech Engn, Baton Rouge, LA 70813 USA
来源：
POLYMER | 2013年 / 54卷 / 02期
基金：
美国国家科学基金会;
关键词：
Shape memory polymer fiber; Self-healing; Thermosetting polymer composites; NETWORKS; SYSTEM; DAMAGE;
D O I：
10.1016/j.polymer.2012.12.046
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Recently, shape memory polymer fibers (SMPFs) have been used in a biomimetic two-step (Close-Then-Heal) self-healing system for healing macroscopic cracks. The objective of this study was to investigate the effect of cold-drawing programming of SMPFs on the healing efficiency of conventional thermosetting polymer composites and the possibility of healing wide-opened crack by localized heating. To achieve the objective, continuous SMPF strand reinforced conventional epoxy composite beam specimens, which were dispersed with thermoplastic particles, were prepared. The SMPF strands were cold-drawn to various pre-strain levels before casting the polymer matrix. Repeated fracture/healing test was conducted by uniaxial tension. It is found that the composites were able to repeatedly heal macroscopic cracks. Strain-hardening by cold-drawing increased the healing efficiency considerably. It was demonstrated that healing can be achieved by heating locally surrounding the cracked region. The mechanism for the enhanced recovery stress was due to cold-drawing induced molecular alignment and formation of some perfect crystals in the hard segment domain of the SMPF. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：920 / 928
页数：9
相关论文
共 32 条
[1]   A smart repair system for polymer matrix composites [J].
Bleay, SM ;
Loader, CB ;
Hawyes, VJ ;
Humberstone, L ;
Curtis, PT .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2001, 32 (12) :1767-1776
[2]   A thermally re-mendable cross-linked polymeric material [J].
Chen, XX ;
Dam, MA ;
Ono, K ;
Mal, A ;
Shen, HB ;
Nutt, SR ;
Sheran, K ;
Wudl, F .
SCIENCE, 2002, 295 (5560) :1698-1702
[3]  
Dry C.M., 1991, CERAMIC T, V16, P729
[4]   Current Trends in the Field of Self-Healing Materials [J].
Guimard, Nathalie K. ;
Oehlenschlaeger, Kim K. ;
Zhou, Jiawen ;
Hilf, Stefan ;
Schmidt, Friedrich Georg ;
Barner-Kowollik, Christopher .
MACROMOLECULAR CHEMISTRY AND PHYSICS, 2012, 213 (02) :131-143
[5]   Self-Healing Materials [J].
Hager, Martin D. ;
Greil, Peter ;
Leyens, Christoph ;
van der Zwaag, Sybrand ;
Schubert, Ulrich S. .
ADVANCED MATERIALS, 2010, 22 (47) :5424-5430
[6]   A self-healing thermosetting composite material [J].
Hayes, S. A. ;
Jones, F. R. ;
Marshiya, K. ;
Zhang, W. .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2007, 38 (04) :1116-1120
[7]   Recent advances in shape-memory polymers: Structure, mechanism, functionality, modeling and applications [J].
Hu, Jinlian ;
Zhu, Yong ;
Huang, Huahua ;
Lu, Jing .
PROGRESS IN POLYMER SCIENCE, 2012, 37 (12) :1720-1763
[8]   Micromechanical behavior of self-healing epoxy and hardener-loaded microcapsules by nanoindentation [J].
Lee, Jim ;
Zhang, Mingqiu ;
Bhattacharyya, Debes ;
Yuan, Yan Chao ;
Jayaraman, Krishnan ;
Mai, Yiu Wing .
MATERIALS LETTERS, 2012, 76 :62-65
[9]   Thermomechanical behavior of thermoset shape memory polymer programmed by cold-compression: Testing and constitutive modeling [J].
Li, Guogiang ;
Xu, Wei .
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2011, 59 (06) :1231-1250
[10]   Shape memory polymer based self-healing syntactic foam: 3-D confined thermomechanical characterization [J].
Li, Guogiang ;
Uppu, Naveen .
COMPOSITES SCIENCE AND TECHNOLOGY, 2010, 70 (09) :1419-1427
1234