Sigma-Aldrich
Platinum-rhodium alloy, Pt90Rh10
Platinum-tungsten alloy, Pt92W8
Platinum/Iridium
POBPC
聚丙烯腈, Polyacrylonitrile
Polyamide-Nylon 12
Polyamide-Nylon 4, 6
Polyamide-Nylon 6