A simple method to introduce phosphoester groups into a polybenzoxazine backbone as multifunctional modifiers

作者：Zhang, Min; Tan, Zhiwei; Hu, Siqian; Qiu, Jinjun; Liu, Chengmei^*

来源：RSC Advances, 2014, 4(83): 44234-44243.

DOI：10.1039/c4ra05136j

• BENZOXAZINE MONOMERS
• CYCLOTRIPHOSPHAZENE SYNTHESIS
• THERMAL-PROPERTIES
• THIOL-ENE
• POLYMERIZATION
• MAIN
• POLYMERS
• THERMOSETS
• SEPARATION
• MALEIMIDE

Phosphoester groups were conveniently introduced into benzoxazine monomers by chemical bonding through nucleophilic reaction of a benzoxazine ring with diethyl phosphite (DEP). The reaction process was monitored by phosphorus 31 nuclear magnetic resonance (P-31-NMR). The characteristic peaks of P-31-NMR corresponding to DEP disappeared entirely when the reaction was run at 90 degrees C for 24 h, which implied the completion of the nucleophilic reaction. The products obtained then underwent direct ring-opening polymerization to produce DEP-modified polybenzoxazines. The introduction of DEP into polybenzoxazines led to a reduction of the onset of the polymerization temperature The adsorption ability for Cd(II) was improved because the phosphoester group provided an efficient chelating site for heavy metal ions.

• 出版日期2014
• 单位江汉大学; 华中科技大学