Affiliation:
1. Hebei Key Laboratory of Functional Polymers School of Chemical Engineering and Technology Hebei University of Technology Tianjin 300401 China
2. School of Materials Science and Engineering North China University of Science and Technology Tangshan 063210 China
3. National Institute for Materials Science (NIMS) Hybrid Materials Unit, Composite Materials Group 1-2-1 Sengen Tsukuba 305-0047 Japan
Abstract
AbstractThree phthalonitrile monomers containing pyrimidine ring and benzene ring side group were successfully synthesized with 4, 6‐dichloro‐2‐phenylpyrimidine, three kinds of phenols (resorcinol, bisphenol A and bisphenol AF) and 4‐nitrophthalonitrile via nucleophilic substitution reaction. All the phthalonitrile monomers exhibited excellent processing performance due to low melting points (Tm) (below 100 °C) and wide processing windows (difference between melting temperature and curing temperature) above 140 °C. By introducing pyrimidine ring and benzene ring side group, the lower melting point of monomers did not affect the thermal stability and thermal mechanical properties of the phthalonitrile resins based on different bisphenols. In particular, 5 % thermal decomposition temperature (T5%) and glass transition temperature (Tg) of phthalonitrile resin based on resorcinol surpassed 455 and 400 °C while storage modulus (E′) was 3209 MPa. Therefore, phthalonitrile resin containing pyrimidine ring and benzene ring side group have potential applications in the field of high temperature resistant polymers and composites.
Funder
National Natural Science Foundation of China