Influencing factors of resilience of polyurethane elastomer
The paper introduced the domestic and international standards for measuring resilience of rubber.The influence of chemical structure factors on resilience of Casting,thermoplastic and mixing polyurethane(PU)elastomer was inrestigated.The factors include type and relative molecular mass of the soft segment,type and mass fraction of the hard segment,type and isomer of isocyanates mass fraction of NCO in prepolymer and amines and alcohols of chain extender etc.The influence of additives(plasticizers and reinforcing agents)and temperature on the resilience of polyurethane elasto-mer was also discussed.The resilience of linear and crosslinked PU was also compared.The results showed that main factors affecting the resilience of PU elastomers are the type and relative molecular mass of soft segment,the content of hard segments,the isocyanate content of prepolymer,crosslinking and temperature.
NETL
NSTL
万方数据
维普
