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以含均三嗪环结构的双氟单体2,4-二(4-氟苯基)-6-苯基-1,3,5-三嗪与商用2,6-二氟苯腈为共聚单体,与具有扭曲、非共平面结构的4-(4-羟基-苯基)-2H-二氮杂萘-1-酮(DHPZ)经溶液亲核取代逐步聚合,合成了一系列主链含三芳基均三嗪环结构和二氮杂萘酮结构线性共聚芳醚腈(PPENPs),其特性黏数为0.65～1.02 dL/g;采用FTIR和1H-NMR证明了聚合物结构与设计一致.PPENPs的DSC曲线中只有一个玻璃化转变温度,在301～337℃之间,且随着分子链中三嗪环结构的增加而升高.N2气氛5%热失重温度在510℃以上,800℃残碳率大于60%.当共聚物中三嗪环含量低于50%时,在室温下可溶于N-甲基吡咯烷酮(NMP)、N,N-二甲基乙酰胺(DMAc)和氯仿(CHCl3)等极性非质子溶剂中.其薄膜的拉伸强度为72～84 MPa,断裂伸长率为7.6%～11%,且随着分子链中三嗪环结构的增加而降低.
The copolymerization of 2,4-bis (4-fluorophenyl) -6-phenyl-1,3,5-triazine with a commercially available 2,6-difluorobenzonitrile (4- (4-hydroxy-phenyl) -2H-phthalazin-1-one (DHPZ) with a distorted and non-coplanar structure was synthesized via stepwise nucleophilic substitution. Containing triaryl-triazine ring structure and phthalazinone structure linear copolymerization ether nitrile (PPENPs), the intrinsic viscosity of 0.65 ~ 1.02 dL / g; using FTIR and 1H-NMR to prove that the polymer structure and design consistent The DSC curve of PPENPs had only one glass transition temperature between 301 and 337 ℃ and increased with the increase of the triazine ring structure in the molecular chain.The 5% weight loss temperature of N2 atmosphere was above 510 ℃, ℃ carbon residue is greater than 60%. When the triazine ring content of the copolymer is less than 50%, at room temperature soluble in N-methylpyrrolidone (NMP), N, N- dimethylacetamide (DMAc) and Chloroform (CHCl3), etc. The tensile strength of the film is 72-84 MPa and the elongation at break is 7.6-11%, which decreases with the increase of triazine ring structure in the molecular chain.