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中南大学学报(自然科学版)

Journal of Central South University

第41卷    第4期    总第194期    2010年8月

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文章编号:1672-7207(2010)04-1369-05
聚合物超声波熔融塑化实验研究
胡建良,蒋炳炎,李俊,林名润,王仁全

(中南大学 机电工程学院,现代复杂装备设计与极端制造教育部重点实验室,湖南长沙,410083)

摘 要: 针对微注射成型对聚合物塑化质量的特殊要求(均质、无硬质点),利用自制的聚合物超声波熔融塑化实验装置进行聚合物超声波熔融塑化实验研究。研究超声波作用时间和作用功率对聚合物塑化量和塑化物料微观形态的影响;研究超声波电源电压、塑化压力对超声波作用功率的影响;揭示超声波作用下聚合物的熔融塑化过程。实验结果表明:提高超声波作用时间和作用功率都能显著提高聚合物超声波熔融塑化量,改善塑化物料的微观形态;当超声波电源电压为250 V,塑化压力为1.50 MPa,塑化时间为10 min时,超声波作用后的聚合物物料基本熔融塑化;加热塑化生成的球晶比较大,粒径为500 μm左右,而超声塑化生成的球晶比较小,粒径为200 μm左右;与加热塑化相比,超声塑化的塑化效果更好,更适合微注射成型。

 

关键字: 超声波熔融塑化;塑化量;微观形态;微注射成型

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 ultrasonic plastification is relatively small, only about 200 μm. Compared with heating plastification, the ultrasonic plastification is more suitable for micro-injection molding with a better plastification quality.

 

Key words: ultrasonic plastification; plastification volume; microstructure; micro injection molding

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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