Carbodiimide-mediated synthesis of poly(L-lactide)-based networks

George, Karina A., Chirila, Traian V. and Wentrup-Byrne, Edeline (2010) Carbodiimide-mediated synthesis of poly(L-lactide)-based networks. Polymer, 51 8: 1670-1678. doi:10.1016/j.polymer.2010.02.009

Author George, Karina A.
Chirila, Traian V.
Wentrup-Byrne, Edeline
Title Carbodiimide-mediated synthesis of poly(L-lactide)-based networks
Formatted title
Carbodiimide-mediated synthesis of poly(L-lactide)-based networks
Journal name Polymer   Check publisher's open access policy
ISSN 0032-3861
Publication date 2010-04-06
Sub-type Article (original research)
DOI 10.1016/j.polymer.2010.02.009
Volume 51
Issue 8
Start page 1670
End page 1678
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2011
Language eng
Formatted abstract
Poly(l-lactide-co-succinic anhydride) networks were synthesised via the carbodiimide mediated coupling of poly(l-lactide) (PLLA) star polymers. When 4-(dimethylamino)pyridine (DMAP) alone was used as the catalyst, gelation did not occur. However, when 4-(dimethylamino)pyridinium p-toluenesulfonate (DPTS), the salt of DMAP and p-toluenesulfonic acid (PTSA), was the catalyst, the networks obtained had gel fractions comparable to those which were reported for networks synthesised by conventional methods. Greater gel fractions and conversion of the prepolymer terminal hydroxyl groups were observed when the hydroxyl-terminated star prepolymers reacted with succinic anhydride in a one-pot procedure than when the hydroxyl-terminated star prepolymers reacted with presynthesised succinic-terminated star prepolymers. The thermal properties of the networks, glass transition temperature (Tg), melting temperature (Tm) and crystallinity (Xc) were all strongly influenced by the average molecular weights between the crosslinks (over(Mc, -)). The network with the smallest over(Mc, -) (1400 g/mol) was amorphous and had a Tg of 59 °C while the network with the largest over(Mc, -) (7800 g/mol) was 15% crystalline and had a Tg of 56 °C.
© 2010 Elsevier Ltd. All rights reserved.
Keyword PLLA
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Medicine Publications
Australian Institute for Bioengineering and Nanotechnology Publications
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Created: Sun, 25 Apr 2010, 00:00:34 EST