中国塑料 ›› 2008, Vol. 22 ›› Issue (08): 63-67 .DOI: 10.19491/j.issn.1001-9278.2008.08.014

• 加工与应用 • 上一篇    下一篇

复合力场下聚苯乙烯气泡形态及开孔行为的研究

李兵,周南桥,文生平
  

  1. 1.北京理工大学珠海学院机械与车辆工程学院,广东珠海519085; 2.华南理工大学聚合物成型加工工程教育部重点实验室,华南理工大学聚合物新型成型装备国家工程研究中心,广东广州510641
  • 收稿日期:2008-01-28 修回日期:1900-01-01 出版日期:2008-08-26 发布日期:2008-08-26

Cell Morphology and Open-cell Behavior of PS in Compound Force Field

LI Bing,ZHOU Nan-qiao,WEN Sheng-ping   

  1. 1 .Machine and Vehicle Institute, Zhuhai Campus of Beijing Institute of Technology, Zhuhai 519085,China;2. The Key Lab of Polymer Processing Engineering, Ministry of Education, National Engineering Research Center ofNovel Equipment for Polymer Processing, South China University of Technology, Guangzhou 510641,China
  • Received:2008-01-28 Revised:1900-01-01 Online:2008-08-26 Published:2008-08-26
  • Contact: LI Bing

摘要: 采用自行设计的动态模拟发泡挤出装置,通过改变加工过程中的压力、温度和力场进行微孔发泡实验。实验表明,对于超临界CO2,在6MPa时不能得到微孔泡沫塑料,8MPa以上才能得到微孔泡沫塑料;不同压力下形成开孔结构时的温度不同,16,12和10MPa压力下形成开孔结构时的温度分别是150,160,165 在相同的工艺条件下振动使产生开孔结构时的温度降低,并且随着振幅的增大和振动频率的提高,温度进一步降低。

关键词: 聚苯乙烯, 微孔塑料, 气泡形态, 振动力场

Abstract: Using a home-made dynamic simulation foaming extrusion equipment,experiments of PS micro-foaming were carried out with different temperature, pressure, and force fields. Microccllular structure of PS was obtained at 8 MPa. The temperature necessary for producing open-cells was found to be
150℃,160℃,and 165℃for pressures of 16 MPa,12 MPa, and 10 MPa, respectively. The addition of a vibration force field improved the cell nucleation.八t the same time, the vibration lowered the opcncell temperature. The open-cell temperature would be lower when the amplitude and frequency wereimproved.

Key words: polystyrene, microccllular plastics, cell morphology, vibration force field