Polyacrylonitrile (PAN) wopangidwa ndi kaboni imamveka mopepuka, yaying'ono pamtundu winawake wa kutentha, yofewa m'mapangidwe, yabwino pakuphatikizana komanso yosavuta kugwira ntchito, yomwe ingapulumutse mphamvu zambiri. Chifukwa chake, kutentha kwamphamvu kwa polyacrylonitrile base kumakhala kopambana kwambiri m'malo a vacuum kapena mpweya, makamaka, kugwira ntchito kwa polyacrylonitrile base kumakhala kokhazikika pamtunda wotentha kwambiri, ndipo ndiye chofunikira kwambiri pamatenthedwe otenthetsera Vutaum.