Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solvents due to its ionic crosslinking structure.

Recently, in drug controlled release system, polyelectrolyte complexes have been rewarded much attention.

his review introduced the forming mechanism and character of polyelectrolyte(PEL) and polyelectrolyte complex(PELC),gave a retrospect to their contribution in the leather theory study, and pointed out their important denotation in theory studying and practice.

METHODS Chitosantripolyphosphate sodium polyelectrolyte was prepared according to the principle of static electricity polymerization.

Polyelectrolyte, a new developed drug delivery system, which has many advantages, such as simple and mild preparation procedure, biocompatibility and biodegradability, excellent responsive drug release properties, and the merits to keep the bioactivity of polypeptide and proteins etc.

Polyelectrolyte complexes(PECs) are formed by static interactions between macromolecules that carry oppositely charged polyions.

This paper introduced the strengthening techniques of polymer latex,polyelectrolyte complexes,nanofibrils,polymer mincrogels and polyelectrolyte multilayers,which have been widely investigated in recent years.

FTIR spectrum of the polyelectrolyte complexes (PECs)showed that -NH+3-OOC-secondary valent bond was formed between chitosan and pectin.

In view of the existing deficiency and shortcoming of the ionic conductivity model based on effective medium theory(EMT),a modified ionic conduction model of the layer between the inorganic fillers and the polymer matrix was introduced by analyzing the enhancement mechanism of conductivity of composite solid polymer electrolyte(CSPE) and the new model parameters were introduced too.