A B C E F H L M P PA PA11 PA12 PAA PAN PANI PAR PBAN PBI PBN PBT PC PCL PCT PCTA PCTFE PDMS PE PEA PEC PEEK PEI PEK PEM PEN PEO PES PESU PET PETG PF PFA PGA PHB PI PIB PK PMAA PMMA PMP POE POM PP PPA PPE PPG PPMA PPO PPP PPS PPSU PPV PS PSF PSU PTFE PTMG PTT PU PUR PVA PVB PVC PVDC PVDF PVF PVK PVP   S T U