1. Department of Polymeric Materials and Engineering College of Materials Science and Engineering, Xi'an Polytechnic University Xi'an China
2. Shaanxi Research Design institute Petroleum and Chemical Industry Xi'an China
3. Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an China
4. Department of Applied Chemistry School of Science, Xi'an University of Technology Xi'an China