TY - JOUR
T1 - In situ preparation of blends of polystyrene and poly(2,6-dimethyl-1,4-phenylene ether)
AU - Nelissen, L.N.I.H.
AU - Meijer, E.W.
AU - Lemstra, P.J.
PY - 1992
Y1 - 1992
N2 - A new approach to prep. blends of polystyrene (I) and poly(2,6-dimethyl-1,4-phenylene ether) (II) directly in the reactor is presented. The key step in this new route is the in-situ low-temp. end-capping of II, dissolved in styrene (III), by the acetylation of the reactive phenolic end-group of II. Without isolation of the acetylated II, the reaction mixt. is subjected to a classical III suspension polymn. procedure, yielding homogeneous beads of I/acetylated II. The presence of acetylated II does not interfere chem. with the III polymn. as demonstrated by gel permeation chromatog. anal. of the sepd. constituents of the blend. A series of blends with different compns. is prepd. The max. content of II in these reaction blends is 35 wt%, due to a limitation in viscosity of the II-III soln. Homogeneous transparent amorphous beads of I/acetylated II are obtained, possessing a single glass transition temp. between 105 Deg and 140 Deg, depending on the compn. [on SciFinder (R)]
AB - A new approach to prep. blends of polystyrene (I) and poly(2,6-dimethyl-1,4-phenylene ether) (II) directly in the reactor is presented. The key step in this new route is the in-situ low-temp. end-capping of II, dissolved in styrene (III), by the acetylation of the reactive phenolic end-group of II. Without isolation of the acetylated II, the reaction mixt. is subjected to a classical III suspension polymn. procedure, yielding homogeneous beads of I/acetylated II. The presence of acetylated II does not interfere chem. with the III polymn. as demonstrated by gel permeation chromatog. anal. of the sepd. constituents of the blend. A series of blends with different compns. is prepd. The max. content of II in these reaction blends is 35 wt%, due to a limitation in viscosity of the II-III soln. Homogeneous transparent amorphous beads of I/acetylated II are obtained, possessing a single glass transition temp. between 105 Deg and 140 Deg, depending on the compn. [on SciFinder (R)]
U2 - 10.1016/0032-3861(92)90664-I
DO - 10.1016/0032-3861(92)90664-I
M3 - Article
SN - 0032-3861
VL - 33
SP - 3734
EP - 3738
JO - Polymer
JF - Polymer
IS - 17
ER -