1. Institute of Plastic Machinery and EngineeringBeijing University of Chemical Technology Beijing 100029 China
2. State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, Institute of Photonics & Photon‐TechnologyNorthwest University Xi'an 710069 China
3. School of Material and Mechanical EngineeringBeijing Technology and Business University Beijing 100048 China