Synthesis and Ballistic Evaluation of Selected Transparent Polyurethane Block Copolymers
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
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A series of transparent polyurethane block copolymers has been synthesized in-house and cast into sheet specimens for ballistic evaluation. The ballistic performances were generally superior to polycarbonate and were found to increase with the following independent variations higher cure temperature, longer room-temperature cure time, higher diisocyanate and diol content, and lower molecular weight lower weight composition of the polyether component. Concurrent high-speed photographs served to characterize the transient bowing of the polymer specimen, the velocities of plugs and fragments generated by the impact, and the FSP residual velocity.
- Polymer Chemistry