Please use this identifier to cite or link to this item:
|Title:||Enzyme-catalyzed polycondensation of polyester macrodiols with divinyl adipate: A green method for the preparation of thermoplastic block copolyesters|
|Authors:||Dai, S. |
|Citation:||Dai, S., Xue, L., Zinn, M., Li, Z. (2009-12-14). Enzyme-catalyzed polycondensation of polyester macrodiols with divinyl adipate: A green method for the preparation of thermoplastic block copolyesters. Biomacromolecules 10 (12) : 3176-3181. ScholarBank@NUS Repository. https://doi.org/10.1021/bm9011634|
|Abstract:||Enzyme-catalyzed polycondensation for the synthesis of block copolymers was reported for the first time. Thermoplastic block copolyesters containing poly[(R)-3-hydroxybutyrate] (PHB) and poly[(R)-3-hydroxyoctanoate] (PHO) blocks were enzymatically prepared by one- or two-step lipase-catalyzed polycondensation. Novozym 435-catalyzed reaction of PHB-diol (Mn of 3100 g/mol, GPC), PHO-diol (Mn of 3200 g/mol, GPC), and divinyl adipate gave block poly(HB-co-HO) (Mn of 9800 g/mol, GPC) with randomly arranged blocks in 55% yield. In two-step polycondensations, Novozym 435-catalyzed reaction of PHB-diol and divinyl adipate afforded 73% of PHB containing two vinyl ester end groups (Mn of 2700 g/mol, GPC), which was further reacted with PHO-diol in the presence of Novozym 435 to give block poly(HB-co-HO)s (Mn of 8800-14 200 g/mol, GPC) with A-B-type arranged blocks in 55-62% yield. The enzymatically prepared block copolyesters demonstrated Tm of 136-142 ° C and 142-153 °C and T g of -37 to -39 °C and were potentially useful thermoplastic biodegradable and biocompatible materials. © 2009 American Chemical Society.|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Dec 6, 2018
WEB OF SCIENCETM
checked on Nov 27, 2018
checked on Nov 16, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.