Rapid determination of residual monomer in polylactide using thermogravimetric analysis

被引：8

作者：

Feng, Lidong ^{[1
,2
,3
]}

Li, Gao ^{[1
]}

Bian, Xinchao ^{[1
,2
]}

Chen, Zhiming ^{[2
]}

Liu, Yanlong ^{[1
,2
]}

Cui, Yi ^{[1
]}

Chen, Xuesi ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Polymer Ecomat, Changchun 130022, Jilin, Peoples R China

[2] Zhejiang Hisun Biomat Co Ltd, Taizhou 31800, Zhejing, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

来源：

POLYMER TESTING | 2012年 / 31卷 / 05期

关键词：

Polylactide; Lactide; Monomer; Thermogravimetric analysis; RING-OPENING POLYMERIZATION; HIGH-MOLECULAR-WEIGHT; POLY(LACTIC ACID); TECHNOLOGIES; DEGRADATION;

D O I：

10.1016/j.polymertesting.2012.03.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A method has been developed to quantitatively determine the residual monomer in polylactide (PLA) using thermogravimetric analysis (TGA). The lactide monomer in PLA is evaporated completely below the decomposition temperature of PLA, thus the monomer content can be determined with a thermogram of PLA. Extensive experiments show that the residual monomer content is equal to the percent weight loss from 100 degrees C to 250 degrees C at a scanning rate of 10 degrees C/min. The measurement reliability has been evaluated by conducting parallel experiments and the results from TGA are in good agreement with the test data obtained using HPLC. The relative standard deviation (RSD) of the measurements is <8.0% at high contents (4.68%-10.33%), while RSD is <18% at a low level (0.3%), which indicates that the method is sufficiently precise for rapid determination of the residual monomer in PLA. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：660 / 662

页数：3

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