Lipase catalyzed copolymerization of 3(S)-isopropylmorpholine-2,5-dione and D,L-lactide.
The polymerization and copolymerization of 3(S)-isopropylmorpholine-2,5-dione (IPMD) and D,L-lactide (DLLA) were carried out in the presence of Porcine pancreatic lipase type II (PPL) as a catalyst at 100 degrees C for 168 h. Homopolymers and random copolymers of various compositions were obtained with a carboxylic acid group at one end and a hydroxyl group at the other end. The glass transition temperature of the copolymers decreases with increasing mole fraction of DLLA residue in the copolymers.
Lehrstuhl für Textilchemie und Makromolekulare Chemie der RWTH Aachen, Veltmanplatz 8, D-52062 Aachen, Germany. yakaifeng@hotmail.com
Yakai
Y
Feng
Doris
D
Klee
Hartwig
H
Höcker
D006358:Hot Temperature; D019344:Lactic Acid / Q000737:chemistry*; D008049:Lipase / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D009025:Morpholines / Q000737:chemistry*; D011091:Polyesters; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry* / Q000378:metabolism*; D013055:Spectrophotometry, Infrared
D009025:Morpholines; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide); D008049:Lipase