Towards Development of a Self-Healing Composite using a Mendable Polymer and Resistive Heating

Mendomers are a group of polymers that are mendable upon heating. Specifically, cracks in these polymers have been shown to heal themselves when heated close to the glass transition temperature. The main mechanism behind the healing is the thermally reversible Diels—Alder reaction, where a dicyclopentadiene unit in the polymer backbone breaks apart into two cyclopentadiene terminal groups, which then reunite upon heating. The present study investigates the feasibility of using a mendomer as a matrix for re-mending composites reinforced with graphite fibers. The graphite fibers are used as electrical conductors to provide the necessary heat to the polymer. Specimens were prepared by spreading a monomer, called mendomer, powder on a graphite/epoxy laminate substrate and curing in a vacuum oven. Microcracks were introduced by bending the substrate coupon, and the latter was heated by applying electric currents. The healing behavior was confirmed by disappearance of microcracks that were observed with an optical microscope and a scanning electron microscope (SEM).

[1]  H. Thomas Hahn,et al.  Resistance Heating for Self-healing Composites , 2007 .

[2]  I. Bond,et al.  A hollow fibre reinforced polymer composite encompassing self-healing and enhanced damage visibility , 2005 .

[3]  Mica Grujicic,et al.  The effect of thermal contact resistance on heat management in the electronic packaging , 2005 .

[4]  N. Sottos,et al.  Microcapsule induced toughening in a self-healing polymer composite , 2004 .

[5]  N. Sottos,et al.  Self-healing structural composite materials , 2003 .

[6]  N. Sottos,et al.  Fracture testing of a self-healing polymer composite , 2002 .

[7]  S. Nutt,et al.  A Thermally Re-mendable Cross-Linked Polymeric Material , 2002, Science.

[8]  P. Curtis,et al.  A smart repair system for polymer matrix composites , 2001 .

[9]  S. White,et al.  Self-activated healing of delamination damage in woven composites , 2001 .

[10]  N. Sottos,et al.  Autonomic healing of polymer composites , 2001, Nature.

[11]  Carolyn M. Dry,et al.  Three designs for the internal release of sealants, adhesives, and waterproofing chemicals into concrete to reduce permeability , 2000 .

[12]  Hideaki Itoh,et al.  Thermally Reversible IPN Organic−Inorganic Polymer Hybrids Utilizing the Diels−Alder Reaction , 2000 .

[13]  Naoki Takano,et al.  Intelligent Material Systems Using Epoxy Particles to Repair Microcracks and Delamination Damage in GFRP , 1999 .

[14]  U. Vaidya,et al.  Parametric studies on self-repairing approaches for resin infused composites subjected to low velocity impact , 1999 .

[15]  David M. Collard,et al.  Cross-Linking and Modification of Poly(ethylene terephthalate-co-2,6-anthracenedicarboxylate) by Diels-Alder Reactions with Maleimides , 1999 .

[16]  A. Chateauminois,et al.  In situ detection of damage in CFRP laminates by electrical resistance measurements , 1999 .

[17]  Yun Mook Lim,et al.  Feasibility study of a passive smart self-healing cementitious composite , 1998 .

[18]  Alessandro Gandini,et al.  Application of the Diels−Alder Reaction to Polymers Bearing Furan Moieties. 2. Diels−Alder and Retro-Diels−Alder Reactions Involving Furan Rings in Some Styrene Copolymers , 1998 .

[19]  Carolyn M. Dry,et al.  Three-part methylmethacrylate adhesive system as an internal delivery system for smart responsive concrete , 1996 .

[20]  Kenneth B. Wagener,et al.  Thermally reversible polymer linkages. II. Linear addition polymers , 1993 .

[21]  M. P. Stevens,et al.  Thermally reversible crosslinking of polystyrene via the furan-maleimide diels-alder reaction , 1992 .

[22]  J. Kennedy,et al.  Thermally reversible polymer systems by cyclopentadienylation. I. A model for termination by cyclopentadienylation of olefin polymerization , 1979 .