In vitro biostability evaluation of polyurethane composites in acidic, basic, oxidative, and neutral solutions.
New and improved properties can often be achieved by compounding two or more different but compatible materials. But, can failure possibility also be increased by such a compounding strategy? In this article, we compared the in vitro biostability of composites with that of the pure polymer. We tested three model composites in oxidative, acidic, basic, and neutral solutions. We found that oxidation degradation was much more profound in the composites than in the corresponding pure polymer. This degradation seemed to be an intrinsic property of composite materials. We also observed the well documented interfacial debonding between filler and matrix and its effects on the mechanical reinforcement of the hydrated composites. The improvements in acid and base resistance were also observed.
Lyu
Suping
S
Medtronic Corporate Science and Technology, 710 Medtronic Parkway, Minneapolis, Minnesota 55432, USA. suping.lyu@medtronic.com
Schley
James
J
Loy
Brian
B
Luo
Lian
L
Hobot
Chris
C
Sparer
Randall
R
Untereker
Darrel
D
Krzeszak
Jason
J
D006863:Hydrogen-Ion Concentration; D008422:Materials Testing / Q000379:methods; D010084:Oxidation-Reduction; D011140:Polyurethanes / Q000737:chemistry*
D011140:Polyurethanes