Thermally stable polybenzoxazines via ortho-norbornene functional benzoxazine monomers: Unique advantages in monomer synthesis, processing and polymer properties
作者:Kan Zhang、Hatsuo Ishida
DOI:10.1016/j.polymer.2015.04.044
日期:2015.6
corresponding thermosets. The benzoxazines containing norbornene groups can polymerize with multiple polymerization mechanisms rather than the single mechanism common to traditional 1,3-benzoxazine resins. The polymerization mechanisms are monitored by in situ FT-IR and differential scanning calorimetry (DSC). Activation energy of polymerization is also studied by DSC. Moreover, the thermoset derived from
Catalyst-Free and Low-Temperature Terpolymerization in a Single-Component Benzoxazine Resin Containing Both Norbornene and Acetylene Functionalities
作者:Kan Zhang、Xinye Yu
DOI:10.1021/acs.macromol.8b01558
日期:2018.8.28
balancing the processability and thermal and mechanical properties of polymers. However, the copolymerization system has rarely been observed in single component resins. Here we report a terpolymerization system in a novel ortho-norbornene functional benzoxazine containing acetylene group (oHPNI-ac), where the chemical structures of oHPNI-ac are confirmed by 1H and 13Cnuclearmagneticresonance (NMR) spectroscopy
多组分共聚是平衡聚合物的可加工性以及热和机械性能的有效方法。但是,在单组分树脂中很少观察到共聚体系。在这里,我们以一种新颖的报告系统三元共聚邻降冰片烯官能苯并恶嗪的含乙炔基(Ô HPNI-AC),其中的化学结构ø HPNI-AC被确认1 H和13 C核磁共振(NMR)光谱法和傅立叶变换红外(FT-IR)光谱。通过差示扫描量热法(DSC),原位FT-IR和固态13研究聚合行为1 H NMR。除了恶嗪环和乙炔基团,聚合ø HPNI-AC表现出降冰片烯官能团与其它报道的含有降冰片烯的单体或低聚物相比意想不到的下热活化的聚合温度。此外,被施加流变学测量揭示的流变行为的演变ø在不同温度下在聚合期间HPNI-AC。衍生自生成的热固性Ô HPNI-AC具有低温聚合,易加工性,高的热稳定性,和低介电常数的组合优点,表明在航天需要高性能聚合物基质其潜在的应用,电子产业等方面的。