A core unit for an energy recovery system for exchanging heat and vapor between two
independent intake and exhaust airstreams without intermixing thereof, the core unit having …

Described herein are modified sulfonated block copolymers which comprise at least two
polymer end blocks A and at least one polymer interior block B, wherein each A block …

A process for preparing sulfonated block copolymers that are solid in water having at least
two polymer end blocks A and at least one polymer interior block B involving sulfonating the …

The present invention further relates to a process for prepar ing the branched polyarylene
ethers (A) and to thermoplastic molding materials comprising the branched polyarylene …

A sulfonated block copolymer which is solid and non-dispersible in water having at least two
polymer end blocks A and at least one interior block B wherein each A block is a polymer …

6.45. 58s. A 1/2000 NE as al. 2004/0101753 A1 5/2004 Hwang et al. 6,306.419 B1 10/2001
Matt t 2004/O137813 A1 7, 2004 Faucher 6,383.391 B 5/2002 E. al 2004/014291.0 A1 …

(57) ABSTRACT A pre-cursor block copolymer for sulfonation which, prior to hydrogenation,
has the general configuration ABA, ABABA,(ABA) nX.(AB) nX, ADBDA, ABDBA.(ADB) …

(57) ABSTRACT A sulfonated block copolymer which is solid and non-dis persible in water
having at least two polymer end blocks A and at least one interior block B wherein each A …

A sulfonated block copolymer which is solid and non-dispersible in water having at least two
polymer end blocks A and at least one polymer interior block B wherein each A block is a …

Sulfonated block copolymer suitable for use as proton exchange membranes for fuel cells
comprise Sulfonated polyaryletherketone blocks and polyethersulfone blocks. The …