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.
Feng
Yakai
Y
Lehrstuhl für Textilchemie und Makromolekulare Chemie der RWTH Aachen, Veltmanplatz 8, D-52062 Aachen, Germany. yakaifeng@hotmail.com
Klee
Doris
D
Höcker
Hartwig
H
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