UNCROSSLINKED EPOXIDE-AMINE ADDITION POLYMERS, 45 - LINEAR ADDITION POLYMERIZATION OF 2,2-BIS[4-(2,3-EPOXYPROPOXY)PHENYL]PROPANE AND ARYLAMINES IN HIGHLY CONCENTRATED-SOLUTIONS
Je. Klee et al., UNCROSSLINKED EPOXIDE-AMINE ADDITION POLYMERS, 45 - LINEAR ADDITION POLYMERIZATION OF 2,2-BIS[4-(2,3-EPOXYPROPOXY)PHENYL]PROPANE AND ARYLAMINES IN HIGHLY CONCENTRATED-SOLUTIONS, Macromolecular chemistry and physics, 199(8), 1998, pp. 1603-1611
In highly concentrated solutions (40 to 70 wt.-%) such as in chloroben
zene (CB) or 2-methoxyethanol (ME) the addition polymerization of 2,2-
bis [4-(2,3 -epoxypropoxy)phenyl] propane (DGEBA) and disecondary diam
ines leads to high molecular weight linear addition polymers. The broa
d molecular weight distribution ((M) over bar(w)/(M) over bar(n) = 4 t
o 17) is caused by the formation of cyclic oligomers. After precipitat
ion in acetone, (M) over bar(w)/(M) over bar(n) values of 2.8 to 3.4 w
ere obtained which indicate a regular linear step-growth polymerizatio
n. Differential scanning calorimetry (DSC) investigations show that CB
retards the addition polymerization, whereas ME exhibits an accelerat
ion of the polymerization. The suggested kinetic model describes the r
eaction behavior over the whole range of polymerization by one paramet
er set only. In order to find the optimum parameters, the set of diffe
rential equations was solved numerically by multivariate non-linear re
gression. An excellent agreement between calculated and experimental c
urves was found.