1. Heilongjiang
Key Laboratory of Molecular Design and Preparation of Flame Retarded
Materials, College of Science, Northeast Forestry University, Harbin 150040, PR China
2. College
of Wildlife Resource, Northeast Forestry University, Harbin 150040, PR China
3. State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China