Papers by Keyword: MTPF

Abstract: The molecule weight and distribution of molecule weight of a kind of medium temperature phenol formaldehyde resin（MTPF）was detected through Liquid Chromatogram-mass spectrum instrument（LC-MS）．The result showed that the distribution scope of molecule weight of the MTPF during the initial stage was approximately 200-400，and the degree of polymerization of the MTPF molecule was 2-4，At the same time，the MTPF during initial stage still has a certain amount of medium outcome hydroxymethyl phenol which was formed through the addition reaction between phenol and formaldehyde．The detection result，from the MTPF during initial stage through ZEN3600 nanometer grain analysis instrument， proved that the grain size of the MTPF during initial stage was about 80-180nm，and the distribution of the grain size presented a normal one that the grain size 96-130nm was about 67%．