The melting behaviour of poly(3-hydroxybutyrate) by DSC. Reproducibility study

被引：55
|
作者：
Wellen, Renate M. R. [1 ]
Rabello, Marcelo S. [2 ]
Fechine, Guilhermino J. M. [3 ]
Canedo, Eduardo L. [1 ]
机构：
[1] Pernambuco Inst Technol, BR-58109970 Recife, PE, Brazil
[2] Fed Univ Campine Grande, Campina Grande, PB, Brazil
[3] Presbiterian Univ Mackenzie, Sao Paulo, Brazil
来源：
POLYMER TESTING | 2013年 / 32卷 / 02期
关键词：
PHB; DSC; Melting; Reproducibility; CRYSTALLIZATION BEHAVIOR; THERMAL HISTORY; MORPHOLOGY; POLYPROPYLENE; POLY(ETHYLENE-TEREPHTHALATE); BIODEGRADATION; COPOLYESTERS; BLENDS; PHB;
D O I：
10.1016/j.polymertesting.2012.11.001
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This work is concerned with the melting behaviour and accuracy of differential scanning calorimeter (DSC) analyses of poly(3-hydroxybutyrate) (PHB), a semi-crystalline thermoplastic polymer completely biodegradable and biocompatible, and obtained from renewable resources. Melting parameters of PHB were determined for the first fusion event applying standard experimental procedures for thermal analysis, using heating rates ranging between 1 degrees C/min and 20 degrees C/min. The analyses of DSC energy flow scans showed a complex melting peak that may be resolved into three elementary peaks having different intensities at different melting temperatures. Peak temperatures depend on heating rate, while the total crystallinity detected was independent of the rate. A study of 24 DSC runs showed good temperature reproducibility (+/- 0.5 degrees C), but poor reproducibility of mass crystallinity (+/- 10%). (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：215 / 220
页数：6
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