合成了一种新型的具有叔丁基和萘结构的二胺单体3,3′-二叔丁基-4,4′-二氨基-4′-萘甲烷(TAPN),分别与萘-1,4-二甲酸、4,4-二羧基二苯醚通过Yamazaki膦酰化反应缩聚制得两种聚芳酰胺薄膜,并对其耐热性能、溶解性能及形态结构等进行测试与分析.结果表明:该类聚合物表现出较好的溶解性能和热性能,常温下不仅能溶于N,N-二甲基甲酰胺(DMF)、N-甲基吡咯烷酮(NMP)、N,N-二甲基乙酰胺(DMAc)、二甲基亚砜(DMSO)等强极性溶剂,甚至加热条件下能较好的溶解于氯仿(CHCl3)、二氯甲烷(CH2Cl2)、四氢呋喃(THF)等低沸点溶剂.同时,聚合物的玻璃化转变温度(Tg)均高于205℃,氮气氛围下5%和10%的热分解温度均大于429℃和452℃.WAXD图谱表明该聚合物为无定形态.
A new diamine monomer 3,3′-ditert-butyl-4,4′-diamino-4′-naphthalene methane (TAPN) was pre-pared; then it reacted separately with naphthalene-l,4-dicarboxylate and 4,4-dicarboxydiphenyl ether, and two kinds of aromatic polyamide films were prepared through Yamazaki phosphorylation reaction. The heat resistance, solubility, and morphological structure of the films were tested and analyzed. The results show that these polymers have good solubility and heat resistance. They can not only dissolve in the intensive polar solvent such as N,N-dimethyl formamide (DMF), N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc), and dimethyl sulfoxide (DMSO) at room temperature, but also dissolve in the low-boiling point solvents such as CHCl3, CH2Cl2, and THF under heating. The glass transition temperature (Tg) of polymers is higher than 205℃, and the 5% weight loss temperature (T5%) and 10%weight loss temperature (T10%) of the polymers is above 429℃ and 452℃, respectively in nitrogen at-mosphere. The WAXD spectra indicate that the polymers have amorphous structures.
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