Diethylphosphonate-containing benzoxazine compound as a thermally latent catalyst and a reactive property modifier for polybenzoxazine-based resins

作者：Lin Liang Kai; Wu Chuang Shao; Su Wen Chiung; Liu Ying Ling^*

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2013, 51(16): 3523-3530.

DOI：10.1002/pola.26754

• catalyst
• curing of polymers
• flame retardance
• thermosets

A diethylphosphonate-containing benzoxazine compound (DEP-Bz) to be used as a multi-functional reaction agent for preparation of high performance polybenzoxazine thermosetting resins has been reported. The chemical structure of DEP-Bz has been characterized with FTIR, H-1 NMR, and elemental analysis. The phosphonate groups of DEP-Bz could convert into phosphonic acid groups which could catalyze the ring-opening addition reaction of benzoxazines, to demonstrate the thermally latent catalytic effect of DEP-Bz on the polymerization of benzoxazine compounds. Moreover, DEP-Bz could also serve as a reactive-type modifier for polybenzoxazines and other thermosets. DEP-Bz modified polybenzoxazine resins have shown relatively low reaction temperature (about 190 degrees C), high mechanical strength with a storage modulus of about 3.0 GPa, and high flame retardancy with a limit oxygen index of about 32.

• 出版日期2013-8-15
• 单位清华大学