Self-healing polymers

Details Self-healing polymers Self-healing polymers

2009-01-09

2011-11-22

Cano, Milton I (Department: 1763)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C528S272000

Reexamination Certificate

active

08063171

ABSTRACT:
A three dimensional structure fabricated from a self-healing polymeric material, comprising poly(ester amides) obtained from ethylene glycol, azelaic acid and 1,1-aminoundecanoic acid, wherein polymeric material has a melt index above 2.5 g/10 min. as determined by ASTM D1238 at 190° C. and 2.16kg, impact resistance and ductility sufficient to resist cracking and brittle fracture upon impact by a 9 mm bullet fired at a temperature of about 29° C. at subsonic speed in a range from about 800 feet/sec to about 1000 feet/sec. It has been determined that the important factors necessary for self-healing behavior of polymers include sufficient impact strength, control of the degree of crystallinity, low melting point and the ability to instantly melt at impacted area.

REFERENCES:
Wu et al . “Self-healing polymeric materials : A review of recent developments”, Prog.Polym.Sci.33(2008), pp. 479-522.

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