CONTINUOUS METHOD FOR OBTAINING OF NOVOLAC OLIGOMER AND MIXED COPOLYMER IN MELT
Journal Title: World Science - Year 2018, Vol 2, Issue 8
Abstract
A new continuous method for production of novolac-type oligomers by interaction of phenol with paraform in the melt in the presence of acid catalyst was developed. To establish the optimal conditions of the reaction, some kinetic regularities of the process were investigated. It is shown that the reaction is of the second order. The optimal conditions for formation of the oligomer are the following: temperature – 100-1200C; duration of the reaction – 10 min; phenolic component: formaldehyde molar ratio – 1.15:10; amount of the catalyst – 1% in relation to the phenolic component. Also, to enhance the heat resistance of the polymers, complex polymers with statistical arrangement of monomers in the macromolecule were synthesized by simultaneous condensation of phenol and card-type bisphenols in the melt. The softening temperature of co-oligomers was increased from 70 0C to 90-180 0C.
Authors and Affiliations
Zaza Molodinashvili, Nikoloz Zazashvili, Michaeli Tchichakua, Marina Chikaidze, Dali Razmadze
Keywords
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- EP ID EP545609
- DOI 10.31435/rsglobal_ws/30082018/6067
- Views 106
- Downloads 0
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