Quantification of residual monomer in polylactide by gas chromatographic internal standard method

被引：7

作者：

Bian, Xinchao ^{[1
,2
]}

Feng, Lidong ^{[1
,2
]}

Li, Gao ^{[1
]}

Chen, Zhiming ^{[2
]}

Chen, Xuesi ^{[1
]}

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, Hangzhou 31800, Zhejiang, Peoples R China

来源：

POLYMER TESTING | 2016年 / 50卷

基金：

中国国家自然科学基金;

关键词：

Polylactide; Residual monomer; Lactide; Gas chromatography; POLY(LACTIC ACID); LACTIDE; DEGRADATION; KINETICS;

D O I：

10.1016/j.polymertesting.2015.11.022

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An analytical method has been developed to quantitatively determine the residual lactide monomer in polylactide (PLA) using an internal standard method of gas chromatography (GC). The experimental results showed that diphenyl ether (DPE) was an appropriate internal standard for quantitative analysis of residual lactide in PLA. PLA and DPE were dissolved in dichloromethane and precipitated in hexane. At the same time, the residual lactide in PLA and DPE as an internal standard were extracted to hexane from the polymer solution. The resulting solution could be directly injected into a GC system. Therefore, the residual lactide was determined quantitatively using an internal standard method of GC. This method is practical for measuring the residual lactide content in PLA. When the lactide content is 5.0%, the relative standard deviation (RSD) of the measurements is 1.7%, while RSD is 6.9% at the low level of 0.4%, which indicates that the method is sufficiently precise. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：79 / 82

页数：4

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