Effect of lactic/glycolic acid side chains on the thermal degradation kinetics of chitosan derivatives

被引：187

作者：

Qu, X ^{[1
]}

Wirsén, A ^{[1
]}

Albertsson, AC ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Polymer Technol, S-10044 Stockholm, Sweden

来源：

POLYMER | 2000年 / 41卷 / 13期

关键词：

chitosan; chitosan derivative; lactic acid;

D O I：

10.1016/S0032-3861(99)00704-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The thermal degradation properties of chitosan and lactic and/or glycolic acid grafted chitosan have been studied by differential scanning calorimetry (DSC) and thermogravimetric analyses (TG) in the range of 25-500 degrees C. Both DSC and dynamic TG results show that the samples are thermal degraded easily after grafting the lactic and/or glycolic acid. From the isothermal TG experiments, the initial activation energy and the activation energy at different stages is obtained. The initial activation energy of all grafted samples is much lower than that of chitosan, especially for the sample GA/CS = 2 and it varies with degree of conversion. The FT-IR spectra of thermally degraded residues give an indication of the chitosan polyscaccharide ring degradation after 30 min in 280 degrees C, while sample GA/CS = 2 will degrade only after 15 min. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：4841 / 4847

页数：7

共 22 条

[11] Interpolymer complexes of chitosan and polymethacrylic derivatives of salicylic acid: preparation, characterization and modification by thermal treatment [J].

Peniche, C ;

Elvira, C ;

Roman, JS .

POLYMER, 1998, 39 (25) :6549-6554

[12] A KINETIC-STUDY OF THE THERMAL-DEGRADATION OF CHITOSAN AND A MERCAPTAN DERIVATIVE OF CHITOSAN [J].

PENICHECOVAS, C ;

ARGUELLESMONAL, W ;

SANROMAN, J .

POLYMER DEGRADATION AND STABILITY, 1993, 39 (01) :21-28

[13]

Qu X, 1999, J APPL POLYM SCI, V74, P3193, DOI 10.1002/(SICI)1097-4628(19991220)74:13<3193::AID-APP23>3.0.CO

[14]

2-V

[15]

Qu X, 1999, J APPL POLYM SCI, V74, P3186, DOI 10.1002/(SICI)1097-4628(19991220)74:13<3186::AID-APP22>3.0.CO

[16]

2-Y

[17]

QU X, 1998, POLYM MAT SCI ENG 79, V216, P242

[18]

QU X, 2000, IN PRESS POLYMER

[19]

Roberts GAF, 1992, CHITIN CHEM, DOI DOI 10.1007/978-1-349-11545-7

[20]

SCREENIVASAN K, 1996, POLYM DEGRAD STABIL, V52, P85

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