Ultrasonic improvement of weld line strength of injection-molded polystyrene and polystyrene/polyethylene blend parts

被引：22

作者：

Lu, C ^{[1
]}

Yu, XF ^{[1
]}

Guo, SY ^{[1
]}

机构：

[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Polymer Res Inst, Chengdu 610065, Sichuan, Peoples R China

来源：

POLYMER ENGINEERING AND SCIENCE | 2005年 / 45卷 / 12期

关键词：

D O I：

10.1002/pen.20456

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The effect of melt temperature, ultrasonic oscillations, and induced ultrasonic oscillations modes on weld line strength of polystyrene (PS) and polystyrene/polyethylene (PS/HDPE) (90/10) blend was investigated. The results show that the increase of melt temperature is beneficial to the increase of weld line strength of PS and PS/HDPE blend. Compared with PS, the increase of melt temperature can greatly enhance the strength of PS/HDPE blends. For PS, the presence of ultrasonic oscillations can enhance the weld line strength of PS at different melt temperatures. But for PS/HDIPE blends, the presence of ultrasonic oscillations can improve the weld line strength when the melt temperature is 230 degrees C, but when the melt temperature is 195 degrees C, the induced ultrasonic oscillations hardly enhance the weld line strength. Compared with Mode I (ultrasonic oscillations were induced into the mold at the whole process of injection molding), the induced ultrasonic oscillations as Mode II (ultrasonic oscillations were induced into the mold after injection mold filling) is more effective at increasing the weld line strength of PS and PS/HDPE blends. The mechanism for ultrasonic improvement of weld line strength was also studied.

引用

页码：1666 / 1672

页数：7

共 22 条

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