The effect of residual stresses on shrinkage, balloon compliance, and mechanical properties was studied for nylon 12 dilatation balloons. Residual stresses of these balloons were relieved by oven heat treatment and liquid CO2 exposure. Residual stresses were measured by quantifying shrinkage at 80�C of excised balloon samples using a dynamic mechanical analyzer. Shrinkage was lower after oven heat treatment and liquid CO2 exposure compared to the as-received balloons, in the axial and radial directions. Significant differences were not observed between the stress-strain curves, balloon compliance, and average burst pressures of the as-received, oven heat treated, and liquid CO2-exposed balloons.

Physical properties of nylon 12 balloons after thermal and liquid carbon dioxide treatments

244th National Meeting (2012)

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