Crystalline imide/arylene ether copolymers

Details Crystalline imide/arylene ether copolymers Crystalline imide/arylene ether copolymers

1994-04-08

1995-05-23

Carrillo, Ana L.

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

Synthetic resins

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

525420, C08L 7908

Patent

active

054183006

ABSTRACT:
Crystalline imide/arylene ether block copolymers are prepared by reacting anhydride terminated poly(amic acids) with amine terminated poly(arylene ethers) in polar aprotic solvents and chemically or thermally cyclodehydrating the resulting intermediate poly(amic acids). The block copolymers of the invention have one glass transition temperature or two, depending on the particular structure and/or the compatibility of the block units. Most of these crystalline block copolymers form tough, solvent resistant films with high tensile properties. While all of the copolymers produced by the present invention are crystalline, testing reveals that copolymers with longer imide blocks or higher imide content have increased crystallinity.

REFERENCES:
patent: 4870155 (1989-09-01), Metzner et al.
patent: 4873295 (1989-10-01), Kurosawa et al.

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