%0 Journal Article
%T A high performance polybenzoxazine via smart ortho
%A Kan Zhang
%A Lin Sun
%A Yuqi Liu
%A Yuting Wang
%J High Performance Polymers
%@ 1361-6412
%D 2019
%R 10.1177/0954008318780995
%X Monofunctional benzoxazine with ortho-norbornene functionality (oHPNI-a) has been synthesized via Mannich condensation. The benzoxazine monomer containing norbornene group can be polymerized by ring-opening metathesis polymerization (ROMP) to form a side-chain benzoxazine functionalized polynorbornene (poly(oHPNI-a)side) with number-average molecular weight 3840 and weight-average molecular weight 7290. The structures of synthesized monomer and side-chain functionalized linear polymer have been confirmed by 1H nuclear magnetic resonance spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The further thermal curing polymerization mechanisms of poly(oHPNI-a)side are monitored by in situ FTIR and differential scanning calorimetry (DSC). Activation energy of polymerization for poly(oHPNI-a)side is also studied by DSC. The polybenzoxazine obtained by ROMP and further thermally activated ring-opening polymerization exhibits much higher thermal stability than the polybenzoxazine directly formed by traditional thermal curing
%K Norbornene
%K ring-opening metathesis polymerization
%K polybenzoxazine
%K high performance
%U https://journals.sagepub.com/doi/full/10.1177/0954008318780995