Study on Technology of Poly (L-lactic acid) via Solid-state Polymerization

Wen-ting HOU; Song-chao TANG; Wen-liang PU; Hui-jun XU

doi:10.14028/j.cnki.1003-3726.2011.05.014

您当前的位置：

首页 >

文章列表页 >

Study on Technology of Poly (L-lactic acid) via Solid-state Polymerization

更新时间：2022-09-18

- Study on Technology of Poly (L-lactic acid) via Solid-state Polymerization
- Polymer Bulletin Vol. 24, Issue 5, Pages: 82-86(2011)
- 作者机构：
  
  华东理工大学材料科学与工程学院，上海市先进聚合物材料重点实验室，上海　200237
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2011.05.014
  CLC：
- Published：2011-05，
扫描看全文
Wen-ting HOU, Song-chao TANG, Wen-liang PU, Hui-jun XU. Study on Technology of Poly (L-lactic acid) via Solid-state Polymerization. [J]. Polymer Bulletin 24(5):82-86(2011)
DOI：

Wen-ting HOU, Song-chao TANG, Wen-liang PU, Hui-jun XU. Study on Technology of Poly (L-lactic acid) via Solid-state Polymerization. [J]. Polymer Bulletin 24(5):82-86(2011) DOI： 10.14028/j.cnki.1003-3726.2011.05.014.

摘要

以

-乳酸单体为原料

采用复合催化剂通过直接熔融法合成低聚左旋聚乳酸（PLLA）

然后分段控温进行固相缩聚（SSP）。对固相缩聚的工艺条件进行了详细的研究。采用粘度法和凝胶渗透色谱法（GPC）对固相缩聚产物PLLA 的特性粘数（［η］）和分子量进行了表征。用差示扫描量热（DSC）研究了固相缩聚产物的熔融行为和结晶度。结果表明：绝对压力80Pa 下

先在105℃下结晶2.5h

再升温至145℃反应35h

得到聚乳酸的重均分子量为42.6万

达到固相缩聚反应前的36倍；熔点达189.6℃

结晶度为69.25%

高分子量聚乳酸的成功制备为其工业化生产的新方法提供了方向。

Abstract

Starting from L-lactic acid

poly (L-lactic acid) with low polymerization degree was first synthesized through direct melt polycondensation with composite catalyst.Then PLLA with higher molecular weight was obtained by solid-state polymerization with different temperature controlling. The conditions of solid-state polymerization were especially studied.Viscosity measurements and gel permeation chromatography (GPC) were used to measure intrinsic viscosity and molecular weight of resulting PLLA polymers

respectively.The differential scanning calorimetry (DSC) was used to characterize the melt properties and crystallinity of PLLA.The results showed that under absolute pressure 80 Pa with subsection temperature controlling (first at105℃ for2.5h

then at145℃ for35h

the molecular weight ( M

) of PLLA is 426

000

which is 36 times higher than that of PLLA first prepared by melt polycondensation. The T

and crystallinity ( X

) are 189.6℃ and 69.25%

respectively.Preparation of high molecular weight polylactic acid provides direction for its industrial production of the new method.

关键词

L-聚乳酸固相缩聚生物降解材料

Keywords

L-Lactic acidSolid-state polymerizationBiodegradable material

references

更多指标>

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Preparation and Characterization of Poly(butylene adipate-co-terephthalate)/Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) Blends

Related Author

No data

Related Institution

School of Materials Science and Engineering, Hunan Institute of Technology

Shenzhen Esun Industrial Co., Ltd.

Xiaogan Esun New Material Co., Ltd

⁰