An Ultrahigh Performance Cross-Linked Polybenzoxazole via Thermal Conversion from Poly(benzoxazine amic acid) Based on Smart o-Benzoxazine Chemistry
An Ultrahigh Performance Cross-Linked Polybenzoxazole via Thermal Conversion from Poly(benzoxazine amic acid) Based on Smart o-Benzoxazine Chemistry
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DOI：
10.1021/ma502297m
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发表时间：
2014-12
期刊：
影响因子：
5.5
通讯作者：
Kan Zhang;Jia Liu;H. Ishida
中科院分区：
文献类型：
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作者：
Kan Zhang;Jia Liu;H. Ishida
合成了一种以酰胺酸和苯并恶嗪基团为重复单元的主链型聚苯并恶嗪，统称为聚苯并恶嗪酰胺酸（poly（BZaa））。与传统的主链型聚苯并恶嗪不同，聚（BZaa）经过一定的热处理后，可以发生聚合和酰亚胺化反应，形成交联聚酰亚胺（cPI）。cPI可以进一步经历典型的环化，以在另外的热处理之后得到交联聚苯并恶唑（cPBO）。以3-苯基-2，4-二氢-2H-苯并[e][1，3]恶嗪-9-胺与邻苯二甲酸酐的反应为基础，设计了一个模型反应。采用傅里叶变换红外光谱（FTIR）和质子核磁共振（1H NMR）光谱来确认模型化合物的结构。用差示扫描量热法（DSC）研究了苯并恶嗪单体及主链型聚苯并恶嗪的开环聚合行为。通过动态力学分析研究了交联聚合物的热性能。
A main-chain-type polybenzoxazine with amic acid and benzoxazine groups as repeating units, generally termed as poly(benzoxazine amic acid) (poly(BZaa)), has been synthesized. Different from traditional main-chain polybenzoxazines, poly(BZaa) can undergo polymerization and imidization reactions to form cross-linked polyimide (cPI) after certain thermal treatment. cPI can further undergo a typical cyclization to give cross-linked polybenzoxazole (cPBO) after an additional thermal treatment. A model reaction is designed based on the reaction of 3-phenyl-2,4-dihydro-2H-benzo[e][1,3]oxazin-9-amine with a phthalic anhydride. Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopies are used to confirm the structure of model compound. The ring-opening polymerization behavior of benzoxazine monomers and main-chain polybenzoxazine is studied by differential scanning calorimetry (DSC). Thermal properties of the cross-linked polymers are also studied by dynamic mechanical analy...