Cryogenic and high speed grinding of viscoelastic polymers Cryogenic and high speed grinding of viscoelastic polymers
The manufacturing of high-precision flexible polymer thin film applied to the substrate of Flexible Electronics has been one of the problems impeding the development of Flexible Electronics.At present,the flexible polymer thin film is still difficult to achieve high precision in large area production.And it is also difficult to cut with traditional machining method due to high elastic plasticity.In this study,both the cryogenic grinding method and high-speed grinding method are applied based on the characteristics of polymer glass transition and high-speed characteristic.The study focuses on the deep analysis of flexible polymer film machining mechanism.The physical properties of the polymer after glass transition in the ultra-low temperature is also explored.By comparing the transparency of PDMS before and after grinding,the surface of quality was analyzed with laser scanning confocal microscope.The effect of grinding speed was investigated at grinding speeds ranging from 2.5 to 75 m/min.The effect of grinding depth was also investigated at grinding depth ranging from 5 to 2000 μm.Finally,the optimum grinding speed and depth were determined.Additionally,the removal and damage mechanism of grinding process is revealed,and the solution of large area and high precision flexible polymer film manufacturing is proposed.According to the results,the surface roughness Ra of the ground polymer can be reduced to 0.008 μm.This reveals the feasibility of polymer grinding process and embody the best machining quality.This study puts emphasis on grinding process with liquid nitrogen and provides a new grinding method for polymer materials with soft tenacity properties.Also,this study provides a theoretical basis for polymer grinding process.This research not only has important theoretical significance to the development of flexible electronics but also extends the application field of grinding.
Cryogenic grinding High-speed grinding viscoelastic polymer machining
Yan Ying Zhang Shangxiong Zhou Ping Guo Xiaoguang Wang Huiping Shan Shuhua
Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Dalian 116024,China
国际会议
第十七届国际制造会议(The 17th International Manufacturing Conference in China)(IMCC 2017))
深圳
英文
1-5
2017-11-23（万方平台首次上网日期，不代表论文的发表时间）