Aramid block copolymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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528335, 528324, 525420, C08L 7710

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active

052122573

ABSTRACT:
Aramid block copolymers which contains blocks which are crystalline and blocks that are noncrystalline after drawing and where polymer chains are flexible in solution and in undrawn polymer, but relatively rigid in drawn polymer, are disclosed. The aramids are tough materials with high modulus and tensile strength. Also disclosed is a process for making such block copolymers. The copolymers are useful as fibers and films, for example in ropes and composites.

REFERENCES:
W. R. Kirkbaum, et al., J. Polym. Sci., Polym. Chem. Ed., 25, 653 (1987).
A. Ya. Yakubovich, et al.; Vysokomol. Soyed. A14, 8, 1838 (1972).
J. Polym. Sci., Part A, Polym. Chem., vol. 25, pp. 653-667 (1987).
J. Polym. Sci., Part B, Polym. Phy., vol. 25, pp. 1043-1055 (1987).
Polym. J., vol. 20, pp. 83-91 (1988).
J. Polym. Sci., Part C, Polym. Lett., vol. 27, pp. 59-63 (1989).

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