The ladderlike structure of PPSQ synthesized by using four kinds of catalysts (MgF<sub>2</sub>,LiF, KOH and DCC) at different polymerization conditions has been i
Photoinduced grafting of acrylic and allyl monomers on polyethylene surface wasgenerally studied by using benzophenone (BP) as a photoinitiator. The grafting pr
Five chitosan derivatives, i.e. O-butyryl chitosan, O-benzoyl chitosan, N-phthaloyl chitosan, N-maleoyl chitosan and O-cyanoethyl chitosan, were prepared from c