Alternating block copolymers of polyarylene polyethers and proce

Details Alternating block copolymers of polyarylene polyethers and proce Alternating block copolymers of polyarylene polyethers and proce

1987-01-16

1988-06-07

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525534, 528205, 528376, C08F28300, C08G 7504, C08L 8102

Patent

active

047497564

ABSTRACT:
A modified Williamson etherification in the presence of phase transfer catalyst is used to synthesize alternating block copolymers and regular copolymers. Unsaturated polyethers of a polynuclear dihydric phenol containing chloroallylic (electrophilic) end groups (prepared from cis- or trans-1,4-dichloro-2-butene and Bisphenol A) and aromatic poly(ether sulfone)s containing terminal phenol (nucleophilic) groups are polycondensed in the presence of tetrabutylammonium hydrogen sulfate as phase transfer catalyst to give alternating block copolymers. The same telechelic polymers were chain-extended with dinucleophilic or dielectrophilic monomers under similar reaction conditions. Both the regular copolymers and the alternating block copolymers were characterized by gel permeation chromatography and DSC.

REFERENCES:
patent: 3594446 (1971-07-01), Gabler
patent: 4362827 (1982-07-01), Yonezawa

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