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Filler effect on polymerization kinetics and phase separation in polymer blends formed in situ
Author(s) -
Lipatov Yu S,
Kosyanchuk L V,
Nesterov A E,
Antonenko O I
Publication year - 2003
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.937
Subject(s) - fumed silica , polyurethane , materials science , polymer , filler (materials) , kinetics , phase (matter) , polymerization , spinodal , chemical kinetics , chemical engineering , polymer chemistry , chemical reaction , composite material , chemistry , organic chemistry , physics , quantum mechanics , engineering
The kinetics of formation of a mixture of two polymers [poly(methyl methacrylate) and polyurethane] in situ in the course of two simultaneously proceeding reactions was studied in the presence of various amount of a filler (fumed silica). It was shown that the filler affects the rates of both reactions. In addition, the filler exerts an influence on the phase separation induced by the chemical reaction increasing the amount of a filler increases the time for the onset of phase separation. The effects observed may be explained both by the increase in the viscosity of the reaction system due to introduction of a filler and by selective adsorption of reaction system components at the interface with filler particles. In all cases, phase separation in the early stages of reaction proceeds in a four‐component system (two polymers formed and two initial compounds) and obeys the spinodal mechanism. It is also shown that the final morphology is determined far from the end of the reaction and before establishing the equilibrium state. © 2003 Society of Chemical Industry