These original Kirt's Cogitations™ may be reproduced
(no more than 5, please) provided proper credit is given to me, Kirt Blattenberger.
here to return to the Table of Contents.
Cog·i·ta·tion [koj-i-tey'-shun] – noun: Concerted
reflection; meditation; contemplation.
Kirt [kert] – proper noun: RF Cafe webmaster.
Plastic, Heal Thyself
Modeled after the way the human body heals itself, a new
breed of plastics is on the horizon that can not only heal micro-cracks, but prevent the propagation of a crack in
progress. Headed by a team at the U. of Illinois, the self-healing plastics incorporate small capsules that
release a healing agent when a crack forms. The agent travels to the break through small capillaries that simulate
how blood flows to a wound. Polymerization is triggered automatically when the healing agent makes contact with a
catalyst embedded in the plastic. The reaction forms a polymer to repair the broken edges of the material. The
rounded capsules act as stress relief points to arrest crack propagation.