Thermal degradation kinetics study of molten polylactide based on Raman spectroscopy

被引：48

作者：

Lin, Zenan ^{[1
]}

Guo, Xuemei ^{[1
]}

He, Zhangping ^{[1
]}

Liang, Xianrong ^{[1
]}

Wang, Mengmeng ^{[1
]}

Jin, Gang ^{[1
]}

机构：

[1] South China Univ Technol, Natl Engn Res Ctr Novel Equipment Polymer Proc, Guangdong Prov Key Lab Tech & Equipment Macromol, Key Lab Polymer Proc Engn,Minist Educ, Guangzhou, Peoples R China

来源：

POLYMER ENGINEERING AND SCIENCE | 2021年 / 61卷 / 01期

关键词：

complex viscosity; degradation kinetics; polylactide; Raman spectroscopy; real‐ time monitoring; thermal degradation; POLY(LACTIC ACID); THERMOMECHANICAL DEGRADATION; POLY(L-LACTIC ACID); MELT EXTRUSION; BLENDS; LINE; MORPHOLOGY; PLA; STABILIZATION; POLYETHYLENE;

D O I：

10.1002/pen.25568

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The thermal degradation of polylactide (PLA) during melt processing may lead to poor product properties. In this study, a unique Raman system was applied to explore the thermal degradation kinetics of molten PLA under five different temperatures and three atmospheres. It was found that the intensity of specific Raman bands correlated with the concentration of functional groups in the PLA during the degradation process. Kinetic models for thermal degradation were established based on the intensity of the characteristic band of C-COO. Kinetic parameters determined by kinetic models quantitatively revealed the effect of temperature and atmosphere on thermal degradation. Furthermore, time sweep rheological tests using the same degradation conditions were performed for verification, and the results corroborated the spectral analyses. This investigation demonstrates the feasibility of Raman spectroscopy for thermal degradation kinetic analysis.

引用

页码：201 / 210

页数：10

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