《Introducing rigid pyrimidine ring to improve the mechanical properties and thermal-oxidative stabilities of phthalonitrile resin》 was written by Yang, Kaixiong; Chen, Xinggang; Zhang, Zhenjiang; Yu, Xiaoyan; Naito, Kimiyoshi; Zhang, Qingxin. Formula: C4H2Cl2N2 And the article was included in Polymers for Advanced Technologies in 2020. The article conveys some information:
In this study, a novel phthalonitrile monomer containing pyrimidine ring, 4,6-bis[3-(3,4-dicyanophenoxy)phenoxy]pyrimidine (BCPM), was successfully synthesized by nucleophilic substitution reaction with resorcinol, 4,6-dichloropyrimidine and 4-nitrophthalonitrile. The BCPM monomer was cured by different temperature programs with 4-(aminophenoxy)phthalonitrile (APPH) as catalyst to give the polymers. The mol. structures of the BCPM monomer and the polymers were investigated by Fourier transform IR (FTIR) spectroscopy and NMR (NMR) spectroscopy. Differential scanning calorimetric (DSC) anal. was performed to study the processability of the BCPM monomer, which showed a wide processing window of about 117°. The mech. properties and thermal-oxidative stability of the polymer were characterized by dynamic mech. anal. (DMA) and thermogravimetric anal. (TGA), resp., which indicated that the polymers exhibited excellent storage modulus, high glass transition temperature over 400°, and outstanding thermal stability. The polymers also have low water absorption capacity and are suitable for humid environments. In the experiment, the researchers used 4,6-Dichloropyrimidine(cas: 1193-21-1Formula: C4H2Cl2N2)
4,6-Dichloropyrimidine(cas: 1193-21-1) is a member of organic chlorides. Organic chloride content in crude oil can be detected through specialized laboratory analysis. Care and attention are essential while sampling and testing.Formula: C4H2Cl2N2
Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia