Open AccessTHE RESEARCH OF CONDITIONS FOR THE FORMATION OF PHENOL FORMALDEHYDE RESINS MODIFIED WITH HYDROXYL CONTAING POLYETHER POLYOL
Publication year - 2020
Publication title -
himiâ i himičeskaâ tehnologiâ/chemistry and chemical engineering
Language(s) - English
Resource type - Journals
eISSN - 2181-1121
pISSN - 1992-9498
DOI - 10.51348/rrzs6230
Subject(s) - maleic anhydride , phenol , polyol , formaldehyde , chemistry , alcohol , polymer chemistry , oligomer , organic chemistry , allyl alcohol , extender , catalysis , polymer , copolymer , polyurethane
The aim of the study was to study the conditions of copolycondensation of phenol alcohol with hydroxyl-containing polyether polyol in the presence of maleic anhydride chain extender in order to obtain modified thermoset phenolic-formaldehyde oligomers. Investigation of the dependence of the content of free phenol, formaldehyde and methylol groups on time during the synthesis of the modified phenol-formaldehyde resin with the ratios hydroxyl-containing polyether polyol:phenol alcohol 1:60 mol/mol and 1:100 mol/mol. It was revealed that maleic anhydride, present in the reaction medium as a copolycondensation catalyst, also participates in copolycondensation reactions as a chain extender. Moreover, as the molar fraction of phenol alcohol increases in the synthesis, an increase in the amount of maleic anhydride involved as a chain extender and an increase in the molecular weight of the resulting modified phenol-formaldehyde oligomer are observed.