1. Department of Mechanical Engineering Quzhou University Quzhou 324000 P. R. China
2. School of Materials Science and Engineering Zhejiang Sci-Tech University Hangzhou 310006 P. R. China
3. Quzhou Xinhui Plastic Fittings Co., Ltd Quzhou 324000 P. R. China
4. Quzhou Xianfeng Advanced Materials Co., Ltd Quzhou 324021 P. R. China