Thermally resistant polymers containing the s‐triazine ring

Abstract

Aromatic dinitriles cyclize to form aromatic polymers containing the s‐triazine ring. In this paper, these polymers are compared thermally with each other and with aromatic melamine polymers prepared via the aromatic diamine and cyanuric chloride. One perfluoroaromatic melamine polymer was prepared and compared with the other two types of polymers. The polymers (triazines and melamine) in which biphenyl was the backbone were increasingly stable up to 1000°C. in nitrogen. The triazine polymers as a group were the most stable. The perfluoroaromatic polymer was the most stable melamine up to 500°C. in air but was very unstable above 700°C.

The influence of cross‐linking reaction on the mechanical and thermal properties of polyarylene ether nitrile

“…Verborgt and Marvel14 prepared a series of polyethers with terminal nitrile groups and intensively studied their cross‐linking reactions. Anderson and John15 prepared aromatic S ‐triazine polymers through the thermal trimerization of aromatic nitriles by using chlorosulfonic acid as the catalyst and heat 16. The thermal stability of the cross‐linked polymers are enhanced because the resonance energy of the triazine (82.5 kcal/mol) is much higher than that of benzene (36 kcal/mol) 17, 18.…”

Hyperbranched polytriazine grafted reduced graphene oxide and its application

“…As shown in Figure (e), the temperature at maximum rate of weight loss of pure PS, RGO/PS, and HBP‐RGO/PS is 403 °C, 436 °C, and 451 °C, respectively. Various studies have demonstrated that graphene and its derivative with high aspect ratio and surface area in polymer provides a tortuous path for the diffusion of gas molecules and significantly reduced the permeation rate of gas . Herein, the graphene nanosheets act as physical barrier and delay the escape of degradation products .…”

“…Various studies have demonstrated that graphene and its derivative with high aspect ratio and surface area in polymer provides a tortuous path for the diffusion of gas molecules and significantly reduced the permeation rate of gas. 36,37 Herein, the graphene nanosheets act as physical barrier and delay the escape of degradation products. 38 The enhanced thermal stability of the nanocomposites may be mainly attributed to the excellent thermal stability of HBP-RGO, and the increased cross-linking degree of HBP-RGO/PS system, which results from the fact that the mobility of polymer segments at the interfaces between the graphene and the PS matrix is suppressed by strong interactions.…”

Synthesis of transparent and thermally stable polycyanurates and their thermal rearrangement

“…Recently, thermally stable and transparent films, whose solubility can be changed by thermal treatment or UV irradiation, were required as described above. Aromatic s ‐triazine‐based polymers have attracted much interest academically and industrially, due to their unique properties, such as excellent thermal resistance, good chemical resistance, and high tensile strengths and moduli . These properties may be attributed to the rigid s ‐triazine units and the strong charge‐transfer interactions between the s ‐triazine rings and the aromatic rings.…”

“…Aromatic s-triazine-based polymers have attracted much interest academically and industrially, due to their unique properties, such as excellent thermal resistance, good chemical resistance, and high tensile strengths and moduli. [6][7][8] These properties may be attributed to the rigid s-triazine units and the strong charge-transfer interactions between the s-triazine rings and the aromatic rings. Furthermore, triallyl cyanurate has been reported to rearrange to triallyl isocyanurate by thermal treatment.…”