TY JOUR TI Experimental research of PVC polymer materials’ coke residue through the CHNS elemental analysis method KW elemental analyzer KW coke residue KW CHNS indicators KW PVC KW experimental research JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Berov, K.K. AU Belshina, Y.N. AU Dementyev, F.A. PY 2014 IS 2014 PB Saint-Petersburg University of State Fire Service of Emercom of Russia