Investigation of the thermal self-healing mechanism in a cross-linked epoxy system

被引:33
作者
Bai, Nan [1 ]
Simon, George P. [1 ]
Saito, Kei [2 ]
机构
[1] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia
[2] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia
来源
RSC ADVANCES | 2013年 / 3卷 / 43期
关键词
NEAR-INFRARED SPECTROSCOPY; MENDABLE POLYMERS; CURE; COMPOSITES;
D O I
10.1039/c3ra43746a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The mechanism of self-healing of a cross-linked epoxy system based on the diglycidyl ether of bisphenol A (DGEBA) and a new diamine cross-linker with two Diels-Alder (DA) adducts has been investigated. The location of the DA adducts on the diamine means that the cross-linker is the structural element that can be thermally cleaved and reformed, thereby allowing the cross-linked polymer to flow and fill or heal cracks and scratches. Since the stimulus for opening up the cross-linked network to allow flow and heal is heat, the temperature of the original network cure also becomes an important variable, and in this work different curing conditions have been explored to find suitable curing conditions which can cause the epoxy-amine to react, whilst avoiding initial scission of the DA adducts. The thermal self-healing mechanism of cured samples was studied by following the effect of scission on a range of properties such as the chemistry of the adducts, the glass transition of the polymer network, the size of units into which the network fragments upon scission and the ability of the network to swell. The appropriate conditions required to heal surface scratches of a micrometre size-scale were also studied.
引用
收藏
页码:20699 / 20707
页数:9
相关论文
共 26 条
  • [11] Crosslinked epoxy materials exhibiting thermal remendablility and removability from multifunctional maleimide and furan compounds
    Liu, YL
    Hsieh, CY
    [J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2006, 44 (02) : 905 - 913
  • [12] Thermally reversible crosslinked polyethylene using Diels-Alder reaction in molten state
    Magana, Sylvain
    Zerroukhi, Amar
    Jegat, Corinne
    Mignard, Nathalie
    [J]. REACTIVE & FUNCTIONAL POLYMERS, 2010, 70 (07) : 442 - 448
  • [13] QUANTITATIVE-ANALYSIS OF THE CURE REACTION OF DGEBA DDS EPOXY-RESINS WITHOUT AND WITH THERMOPLASTIC POLYSULFONE MODIFIER USING NEAR-INFRARED SPECTROSCOPY
    MIN, BG
    STACHURSKI, ZH
    HODGKIN, JH
    HEATH, GR
    [J]. POLYMER, 1993, 34 (17) : 3620 - 3627
  • [14] Near- and mid-infrared spectroscopy studies of an epoxy reactive system
    Poisson, N
    Lachenal, G
    Sautereau, H
    [J]. VIBRATIONAL SPECTROSCOPY, 1996, 12 (02) : 237 - 247
  • [15] ACTIVATION-ENERGY FOR VISCOUS-FLOW AND MELT STRUCTURE OF LINEAR-POLYMERS
    PRIVALKO, VP
    LIPATOV, YS
    [J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1976, 14 (09) : 1725 - 1727
  • [16] A self-healing polymer network based on reversible covalent bonding
    Scheltjens, G.
    Diaz, M. M.
    Brancart, J.
    Van Assche, G.
    Van Mele, B.
    [J]. REACTIVE & FUNCTIONAL POLYMERS, 2013, 73 (02) : 413 - 420
  • [17] Bivalent bendamustine and melphalan derivatives as anticancer agents
    Scutaru, Ana Maria
    Wenzel, Maxi
    Gust, Ronald
    [J]. EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, 2011, 46 (05) : 1604 - 1615
  • [18] INFLUENCE OF THE STRUCTURE ON THERMOSET CURE KINETICS
    STUTZ, H
    MERTES, J
    [J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1993, 31 (08) : 2031 - 2037
  • [20] Talreja R., 1994, DAMAGE MECH COMPOSIT