High-molecular weight polymers and methods of manufacture

Abstract From the Canadian patent

A composition comprises a solid-stated block copolymer of an aromatic polyester and a caprolactone, wherein the copolymer has been solid state polymerized such that intrinsic viscosity increases at least 20% the , caprolactone content decreases no more than 1.2% absolute and the transesterification increases no more than 3.5% absolute and wherein the , solid-stated copolymer has an intrinsic viscosity of at least 0.82. Particularly preferred chain extension reactions are performed at a temperature of less than 175~C, and even more preferably at less than 165~C. In further aspects of the inventive subject matter yarns and methods of , producing a fiber include contemplated solid-stated …