In situ preparation of blends of polystyrene and poly(2,6-dimethyl-1,4-phenylene ether)

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Abstract

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)]
Original languageEnglish
Pages (from-to)3734-3738
JournalPolymer
Volume33
Issue number17
DOIs
Publication statusPublished - 1992

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