Accordingly, based on comprehensive consideration of the measured material properties of semi-crystalline polymer and amorphous polymer in fabrication of the microneedle array using LUμIM, it could be obtained that, for semi-crystalline polymer, the hardness and elastic modulus showed a trend of increasing first and then decreasing, where the highest crystallinity was generated with an optimal excitation voltage value.
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The Improvement Effect and Mechanism of Longitudinal Ultrasonic Vibration on the Injection Molding Quality of a Polymeric Micro-Needle Array.
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