Block copolymers containing vinyl and arylene sulfide segments v

Details Block copolymers containing vinyl and arylene sulfide segments v Block copolymers containing vinyl and arylene sulfide segments v

1990-02-08

1991-03-05

Jacobs, L. T.

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

Synthetic resins

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

525189, C08L 8102

Patent

active

049978942

ABSTRACT:
Block copolymers of vinyl monomers and thioarylene segments are prepared from copoly(arylene sulfide-disulfides), i.e., copoly(arylene sulfides) having an appreciable quantity of disulfide linkages in the polymer chains. Such copoly(arylene sulfides) correspond to the structure [(--A--S--).sub.1-x (A--S--S--).sub.x ].sub.n, wherein X is in the range of 0.5 to 0.001 based on the combined number of (--A--S--) and (A--S--S--) units. In a preferred embodiment n is at least 200; however, polymers and prepolymers having a much lower degree of polymerization can be used, e.g., materials where n is about 25 or higher. To prepare the block copolymers, an unsaturated monomer capable of undergoing free radical addition polymerization under the reaction conditions employed is subjected to such polymerization in the presence of the copoly(arylene sulfide-disulfide) having the above formula. During the course of the polymerization, chain transfer occurs resulting in formation of the block copolymers.

REFERENCES:
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Hallensleben, Manfred L., European Polymer Journal, 13, 437-440 (1977).
Hallensleben, Manfred L., Polymer Bulletin, 1, 557-562 (1979).

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