## Abstract A microwave‐assisted method of synthesizing high‐molecular‐weight PLA using SSA as green catalyst was developed. Yellowish PLA with $\overline M \_{\rm v}$ above 2.0 × 10^4^ g · mol^−1^ was obtained when the reaction was run at 260 °C within 60 min under microwave irradiation with 0.4 w
Synthesis of high molecular weight poly(L-lactic acid) via melt/solid polycondensation: Intensification of dehydration and oligomerization during melt polycondensation
✍ Scribed by Fangchao Song; Linbo Wu
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 558 KB
- Volume
- 120
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract Directly starting from L‐lactic acid (LA) and L‐aspartic acid (Asp), biodegradable material poly(lactic acid‐__co__‐aspartic acid) [P(LA‐__co__‐Asp)] was synthesized via melt polycondensation. The synthetic conditions, including type and dosage of catalyst, temperature, and time of copo
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
## Abstract **Summary:** Stereoblock poly(lactic acid) consisting of D‐ and L‐lactate stereosequences can be successfully synthesized by solid‐state polycondensation of a 1:1 mixture of poly(L‐lactic acid) and poly(D‐lactic acid). In the first step, melt‐polycondensation of L‐ and D‐lactic acids is
## Abstract Starting from D,L‐acid and SnCl~2~ as catalyst, poly(D,L‐lactic acid) (PDLLA) was directly synthesized by melt polycondensation. Under the appropriate conditions such as 0.5 wt % SnCl~2~, 170–180°C, 70 Pa, and 10 h, the viscosity‐average molecular weight (__M__~η~) of PDLLA was 4100 Da.