A series of novel aromatic poly(arylene ether)s containing diphenylfluorene and phenyl-s-triazine groups in the main chain were prepared by a solution nucleophilic polycondensation of 2

4-bis(4-fluorophenyl)-6-phenyl-1

3

5-s-triazine (BFPT) with Biphenol (BP) and 9

9'-bis(4-hydroxyphenyl)fluorine (BHF) to investigate the effects of bulky diphenylfluorene units on solubility as well as thermal and mechanical properties.The synthetic procedure was efficiently optimized

resulting in high Mn up to 6.3104 (GPC).The structure of the resulting polymers were characterized by elemental analysis

FTIR

NMR

and their thermal properties were evaluated by DSC

DMA

TGA measurements in succession.The solubility of polymers obtained was modified by the presence of diphenylfluorene groups in the polymer main chain resulting in being readily dissolved in common organic solvents

such as N-methylpyrrolidone (NMP)

chloroform

1

1

1

2

-tetrachlorethane and pyridine

when the contents of diphenylfluorene structural units surpassed 20%.Moreover

PEPs had excellent thermal properties with glass transition temperarures (Tgs) in the range of 269~307 ℃ measured by DSC

and 269~291 ℃ detected by DMA

5% mass-loss temperatures lying between 544 ℃ and 580 ℃

char yields at 800 ℃ higher than 48% under N2atmosphere.The solubility and Tgs increase with the increase of diphenylfluorene contents in the polymer backbone.This kind of phenyl-s-triazine-based poly(arylene ether)s may be considered as a good candidate of high-performance structural materials.