## Abstract A microwaveβassisted method of synthesizing highβmolecularβweight PLA using SSA as green catalyst was developed. Yellowish PLA with $\overline M \_{\rm v}$ above 2.0βΓβ10^4^βgβΒ·βmol^β1^ was obtained when the reaction was run at 260βΒ°C within 60βmin under microwave irradiation with 0.4βw
Research on the Modification of Poly(L-Lactic Acid) by Glucose via Direct Melt Polycondensation
β Scribed by Luo, Shi He; Yu, Shi Qin; Li, Jian Xiao; Wang, Zhao Yang
- Book ID
- 120529788
- Publisher
- Trans Tech Publications, Ltd.
- Year
- 2011
- Tongue
- English
- Weight
- 330 KB
- Volume
- 311-313
- Category
- Article
- ISSN
- 1662-8958
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Starting from D,Lβacid and SnCl~2~ as catalyst, poly(D,Lβlactic acid) (PDLLA) was directly synthesized by melt polycondensation. Under the appropriate conditions such as 0.5 wt % SnCl~2~, 170β180Β°C, 70 Pa, and 10 h, the viscosityβaverage molecular weight (__M__~Ξ·~) of PDLLA was 4100 Da.
Poly(L-lactic acid) (PLLA) was produced by the melt polycondensation of L-lactic acid. For the optimization of the reaction conditions, various catalyst systems were examined at different temperature and reaction times. It was discovered that Sn(II) catalysts activated by various proton acids can pr