Synthesis, Amphiphilic Property and Thermal Stability of Novel Main-chain Poly(o-carborane-benzoxazines)

3rd Annual International Workshop on Materials Science and Engineering

Yang, Xiaoxue^1 ; Han, Guo^1 ; Yang, Zhen^1 ; Zhang, Xiaoa^1 ; Jiang, Shengling^1 ; Lyu, Yafei^1

Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing

100029, China^1

关键词: Amphiphilic property;    Aromatic structures;    Elevated temperature;    Initial decomposition temperatures;    Mannich reactions;    Paraformaldehydes;    Polymer structure;    Water solubilities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/250/1/012010/pdf
DOI  :  10.1088/1757-899X/250/1/012010

来源: IOP

【 摘 要 】

Five poly(o-carborane-benzoxazines) were synthesized via Mannich reaction of o-carborane bisphenol, paraformaldehyde, and diamine, and their structures were well characterized. Light transmission and1H NMR in D2O confirmed that poly(o-carborane-benzoxazines) with PEG segments showed excellent water solubility and amphiphilic property. TGA analyses were conducted under nitrogen and air, and the results showed that the polymers own high initial decomposition temperatures owing to the shielding effect of carborane moiety on its adjacent aromatic structures. Besides, poly(o-carborane-benzoxazines) own high char yield at elevated temperatures, for the boron atom could combine with oxygen from the polymer structure or/and the air and be oxidized to form boron oxide, and thus the polymer weight is retained to a large extent. PEG segments had an adverse effect on the initial decomposition and char yield, and thus their concentration should be adjusted to control the polymer's thermal stability.