Polyimides serve as reinforcing rigid-backbone segments in nylon 6 copolymers. In a first embodiment, the copolymers are prepared from polyimides containing acylated caprolactam moieties pendant therefrom which provide sites for polycaprolactam grafts. In a second embodiment, polyimide oligomers end-capped with acyl-activated caprolactam rings permit the formation of block caprolactam copolymers that include polyimide reinforcing segments. The polyimide/nylon 6 copolymers have properties superior to those of nylon 6 and can also serve as compatibilizing agents.
Diamine Compound Having Phosphorylcholine Group, Polymer Thereof, and Process for Producing the Polymer
申请人:Nagase Yu
公开号:US20100036081A1
公开(公告)日:2010-02-11
Highly polymerizable diamine compounds having a phosphorylcholine group are disclosed. High-molecular weight polymers are obtained from the highly polymerizable diamine compound having a phosphorylcholine group as a monomer, and the polymers have improved mechanical strength, water resistance and heat resistance while maintaining excellent biocompatibility and processability of MPC polymers. Processes for producing the polymers are disclosed. The diamine compounds having a phosphorylcholine group are represented by Formula (I). The polymers contain at least 1 mol % of a specific structural unit with a phosphorylcholine group represented by Formula (II) and have a number average molecular weight of not less than 5,000. In the processes, the diamine compound is used as a monomer.