The sample of low gold content is decomposed by mixed acid,then,carrying out dynamic separation and enrichment by using polyurethane foam plastic,then, roasting,ashing and getting the gold disolved and enriched into small volume,again,determining it by flame atomic absorption spectrophotometry to improve the accuracy of the assay of low content gold.

Research development of blowing agent of polyurethane foam in environmental protection;

Study on polyurethane foam modified by bismaleimide and epoxy resin;

Preparation and performance characterization of lignin-based polyurethane foam;

This paper mainly introduced the research and development of polyurethane foams,based on starch,rosin,plant oil,lignin and cellulose both at home and abroad.

The recent progress of silicone active agents both polydimethyl siloxane and oxyalkylene siloxane copolymer for polyurethane foams are reviewed.

The comparisions were made between the flame retardant behavior of EG and that of some halogen-free flame retardants (HFFR) in rigid polyurethane foams (RPUF).