Preparation and characterization of novel multi-branched polymers in situ cured from benzoxazine/epoxy resin/primary amines blends
Preparation and characterization of novel multi-branched polymers in situ cured from benzoxazine/epoxy resin/primary amines blends
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苯并恶嗪/环氧树脂/伯胺共混物原位固化新型多支化聚合物的制备和表征
DOI：
10.1039/c5ra26249f
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发表时间：
2016-02
期刊：
影响因子：
3.9
通讯作者：
Gu, Yi
中科院分区：
文献类型：
--
作者：
Wang, Hongyuan;Yang, Po;Zhu, Rongqi;Gu, Yi
以二氨基二苯甲烷（ddm）或六亚甲基二胺（6a）为固化剂，以苯并恶嗪（M）、脂环族环氧树脂（T）为固化剂，通过控制固化反应顺序，原位合成了具有多支化结构的高性能聚合物。采用差示扫描量热法（DSC）、傅里叶变换红外光谱（FTIR）、动态力学分析（DMA）和力学性能测试等方法研究了该体系的固化行为、交联结构和性能。结果表明，T与ddm或6a之间的反应比M与ddm或6a之间的反应更容易进行，并且在基于M、T和ddm或6a的三元体系中可以原位形成多支化聚合物。与聚苯并恶嗪或聚苯并恶嗪/环氧树脂体系相比，具有多支化结构的树脂固化物的耐热性和力学性能有较大提高。研究结果为控制聚苯并恶嗪的化学交联结构和性能提供了新的途径。
High performance polymers with multi-branched structures were prepared in situ from ddm-based benzoxazine (M), cycloaliphatic epoxy resin (T) and diaminodiphenylmethane (ddm) or hexamethylenediamine (6a) via controlling the curing reaction sequence of the system. The curing behavior, cross-linked structures and properties of the system were investigated by differential scanning calorimetry (DSC), Fourier transform infrared (FTIR), dynamic mechanical analysis (DMA) and mechanical properties test, respectively. The results suggest that the reaction between T and ddm or 6a was more easily processed than that of M and ddm or 6a, and the multi-branched polymers can be formed in situ in a ternary system based on M, T and ddm or 6a. The heat resistance and mechanical properties of the cured resins with multi-branched structures were greatly improved compared with the polybenzoxazine or poly-benzoxazine/epoxy resin systems. The obtained results provide a new approach to control the chemical cross-linked structures and properties of polybenzoxazines.
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