上海充通大学 材料科学与工程学院 School of Materials Science and Enginecring.SITU AN203 Steels Modulus-density Technical Ti alloys Ni alloys 1000 ceramics WC o-一W alloys Composites. ●P 100 Glas- GFRP Metals Wood 10 Natural PMMA Lead alloys materials Zinc loys PEEK PET PS Families occupy Rigid polym discrete fields Polymers 10 Foams Slcone 10 elastomers Palyurethano 103 Neoprene Flexible polymor foams Butyl Elastomers tubber 10 MFA 06 0.01 0.1 10 Log Density,p(Mg/m3) scales