Citation: Yuan-lin Li, Sai Li, Li-jie Ji, Bin He, Zhong-wei Gu. STUDIES ON THE DEGRADATION OF POLY(L-LACTIDE-r-TRIMETHENE CARBONATE) COPOLYMERS[J]. Chinese Journal of Polymer Science, ;2013, 31(7): 966-973. doi: 10.1007/s10118-013-1299-3 shu

STUDIES ON THE DEGRADATION OF POLY(L-LACTIDE-r-TRIMETHENE CARBONATE) COPOLYMERS

Corresponding author: Zhong-wei Gu,
Received Date: 26 November 2012
Revised Date: 24 December 2012

Fund Project: This work was financially supported by the National Basic Research Program of China (National 973 program, No. 2011CB606206), the National Natural Science Foundation of China (Nos. 50830105, 51133004), Program for New Century Excellent Talents in Universities, Ministry of Education (MOE, NCET-10-0564) and Program for Changjiang Scholars and Innovative Research Teams in Universities (IRT1163).

Biodegradable poly(L-lactide-r-trimethene carbonate) copolymers (P(LLA-co-TMC)) with different compositions were synthesized. The degradation of the copolymers was carried out in phosphate buffer saline solutions (pH=7.4) at 37 ℃. The compositions, structure and properties of the copolymers in degradation were characterized with 1H-NMR, DSC, XRD, GPC, and SEM. The weight loss of the P(LLA-co-TMC) 50/50 was much faster than that of P(LLA-co-TMC) 85/15 and PLLA homopolymer. Interestingly, though the molecular weight of the compolymers decreased greatly during degradation, the compositions were rarely varied. After long time degradation, the PLLA segments were induced to crystallize in the P(LLA-co-TMC) 85/15 copolymer. The SEM observation of the surface and cross-section of P(LLA-co-TMC) 85/15 copolymer films found it was similar to the bulk degradation of PLLA homopolymer.
- Copolymer
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