Abstract: A process for preparing a thermoplastic copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): wherein n=2, 3 or 4, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester, wherein the process comprises the steps of: (i) reacting said aliphatic glycol with said aromatic dicarboxylic acid to form a bis(hydroxyalkyl)-ester of said aromatic dicarboxylic acid; and (ii) reacting said bis(hydroxyalkyl)-ester of said aromatic dicarboxylic acid with the monomer (I) under conditions of elevated temperature and pressure in the presence of a catalyst, wherein the monomer (I) is present in a range of from 5% to about 20 mol % of the glycol fraction of the copolyester, wherein the aromatic dicarboxylic acid is selected from naphthalene dicarboxylic acid and terephthalic acid, and wherein the aliphatic glycol is ethylene glycol.

Abstract: Disclosed herein are film, fiber, molding composition and molded article including copolyesters that exhibit improved heat-resistance and thermo-mechanical stability. The copolyester is derived from an aliphatic glycol, an aromatic dicarboxylic acid selected from naphthalene dicarboxylic acid and terephthalic acid, and 5-50 mol % (based on 100 mole % of all glycols) of an additional monomer, bis(2-hydroxyalkyl)-2,2?-(1,4-phenylene)bis(1,3-dioxoisoindoline-5-carboxylate). The aromatic dicarboxylic acid is at least one of naphthalene dicarboxylic acid and terephthalic acid and the aliphatic glycol is selected from C2, C3 or C4 aliphatic diols. Furthermore, the copolyesters have crystallinity of at least 10%.

Abstract: A copolyester includes repeating units derived from an aliphatic glycol, terephthalic acid, and the monomer of formula (I): wherein n=2, 3 or 4; Z is C?O; comonomer (I) constitutes a proportion of the glycol fraction of the copolyester and is present in a range of from about 5 to about 15 mol % of the glycol fraction of the copolyester; wherein said copolyester is semi-crystalline. A process tor making the copolyester includes annealing a copolyester of formula (I) at 20-80° C. below the crystalline melting point (Tm) and above the glass transition temperature (Tg).

Abstract: A copolyester includes repeating units derived from an aliphatic glycol, terephthalic acid, and the monomer of formula (I): wherein n=2, 3 or 4; Z is C?O, comonomer (I) constitutes a proportion of the glycol fraction of the copolyester and is present in a range of from about 5 to about 15 mol % of the glycol fraction of the copolyester; wherein said copolyester is semi-crystalline. A process tor making the copolyester includes annealing a copolyester of formula (I) at 20-80° C. below the crystalline melting point (Tm) and above the glass transition temperature (Tg).

Abstract: A semi-crystalline biaxially oriented film comprising a copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (I) wherein n=2, 3 or 4, Z is C?O, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester and is present in an amount of at least about 4 mol % of the glycol fraction of the copolyester.

Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (Formula (I)) wherein n=2, 3 or 4, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester; and a film, fibre or moulding composition or moulded article comprising said copolyester.

Abstract: A film comprising a copolyester wherein said copolyester comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and a comonomer (M) selected from the group consisting of N,N?-bis-(2-hydroxyalkyl)-bicyclo-[2,2,2]-oct-7-ene-2,3,5,6-tetracarboxylic diimide (BODI) and 2-hydroxyalkyl-2-[p-(2-hydroxyethoxycarbonyl)phenyl]-1,3-dioxo-2H-isoindole-5-carboxylate (DOIC), wherein the number of carbon atoms is the 2-hydroxyalkyl group is 2, 3 or 4, and wherein comonomer (M) constitutes a proportion of the glycol fraction of the copolyester.

Abstract: A film comprising a copolyester wherein said copolyester comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and a comonomer (M) selected from the group consisting of N,N?-bis-(2-hydroxyalkyl)-bicyclo-[2,2,2]-oct-7-ene-2,3,5,6-tetracarboxylic diimide (BODI) and 2-hydroxyalkyl-2-[p-(2-hydroxyethoxycarbonyl)phenyl]-1,3-dioxo-2H-isoindole-5-carboxylate (DOIC), wherein the number of carbon atoms is the 2-hydroxyalkyl group is 2, 3 or 4, and wherein comonomer (M) constitutes a proportion of the glycol fraction of the copolyester.

Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (Formula (I)) wherein n=2, 3 or 4, Z is S(?O)2, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester; and films, fibers, molding compositions or molded articles comprising said copolyester.

Abstract: A semi-crystalline biaxially oriented film comprising a copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (I) wherein n=2, 3 or 4, Z is C?0, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester and is present in an amount of at least about 4 mol % of the glycol fraction of the copolyester.

Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (Formula (I)) wherein n=2, 3 or 4, Z is S(?O)2, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester; and films, fibres, moulding compositions or moulded articles comprising said copolyester.

Abstract: A polyester film comprising a copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): wherein n=2, 3 or 4, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester.

Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, naphthalene-dicarboxylic acid, and the monomer of formula (I) wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.

Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, terephthalic acid, and the monomer of formula (I): wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.

Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, terephthalic acid, and the monomer of formula (I): wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.

Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, naphthalene-dicarboxylic acid, and the monomer of formula (I) wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.

Abstract: An ion-conducting polymer wherein at least 80% of the repeat units comprise an ion-conducting region and a spacer region is disclosed. The ion-conducting region has an aromatic backbone of one or more aromatic groups, wherein at least one ion-conducting functional group is attached to each aromatic group. The spacer region has an aromatic backbone of at least four aromatic groups, wherein no ion-conducting functional groups are attached to the aromatic backbone. The polymer is suitable for use as a fuel cell membrane, and can be incorporated into membrane electrode assemblies.