聚合物超声波熔融塑化试验研究-中南大学学报.pdf

41 4 ( ) Vol.41 No.4 2010 8 Journal of Central South University (Science and Technology) Aug. 2010 (410083) () 250 V1.50 MPa10 min 500 µm 200 µm TQ325.1+2 O426.9 A 1672−7207(2010)04−1369−05 Experimental study of polymer ultrasonic plastification HU Jian-liang, JIANG Bing-yan, LI Jun, LIN Ming-run, WANG Ren-quan (Key Laboratory of Education Ministry for Modern Complex Equipment Design and Extreme Manufacturing, School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China) Abstract: Considering the special requirement(homogeneous and no hard spots) of the quality of polymer melt in micro-injection, the experimental research of polymer ultrasonic plastification was carried out on the home-made ultrasonic melting plastification experimental device. The effect of the time and power of ultrasonic on the volume and the micro-morphology of the polymer were studied and the variety of ultrasonic active power affected by the power voltage of ultrasonic and pressure of plastification was studied. The melting plastification process during the action of ultrasonic was researched. The results show that the increase of action time and power of ultrasonic can obviously enhance the plastification volume, and the quality of polymer materials’ micro-morphology. Most polymer materials fully melt under the condition of ultrasonic power voltage of 250 V, the plastification pressure of 1.50 MPa and the plastification time of 10 min. The dimension of spherulites generated by heating plastification is about 500 µm, but that of spherulites generated by ultr