Isophthaloyl chloride(IPC)

1

3

5-benzenetricarbonyl chloride(TMC)

and l

2

4

5- benzeneteraearbonyl tetrachloride(BTTC)were used to polymerize with l

3-benzenediamine(MPDA)

l

2- dimethylenediamine(DMDA) and piperazine(PIP)respectively on the surface of thermal stable copolymer poly(phthalazinone ether sulfone ketone)membranes．The components and characteristics of the composite membranes including their IR spectra

morphdogy

polymer crystallinity of the active layers and permeation properties

were carefully studied with various analytical methods such as infrared (IR) spectroscopy

atomic force microscopy(AFM)

X-ray diffraction and permeation testing．Results indicated that when MPDA was used as the diamine monomer

the NaCl salt rejection of the composite membranes increased and the flux decreased with the increasing of the crosslink degree of the active layer．When TMC was used as the chloftde monomer

the same tondency was exhibited with the increasing of the tight degree that molecules of the active layers were packed．Thus．according to the special separation system

the molecular stmcture of the function layer can be designed to acquire the best separation properties．