Synthesis and Characterization of Polyesters from Glycerol by-Product of Biodiesel Production

被引：10
|
作者：
Rodarte de Moura, Carla V. [1 ]
Nunes, Antonia S. L. [1 ]
Moita Neto, Jose M. [1 ]
Neres, Haroldo L. S. [1 ]
de Carvalho, Lee M. G. [1 ]
de Moura, Edmilson M. [1 ]
机构：
[1] Univ Fed Piaui, Dept Quim, BR-64049550 Teresina, PI, Brazil
来源：
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2012年 / 23卷 / 07期
关键词：
glycerol; resins; biodiesel; HYDROGEN-PRODUCTION; DENSITY; ACID;
D O I：
10.1590/S0103-50532012000700005
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Glycerol, a by-product from biodiesel production can react with di-carboxylic organic acids, resulting in polyesters, and can be used in the composition of urea/formaldehyde or phenol/formaldehyde resins to improve the qualities of adhesion and moisture resistance of them. In this work, six kinds of resins derived from glycerol, named as GAA (glycerol/adipic acid), GAAU (glycerol/adipic acid/urea), GAF (glycerol/phtalic acid), GU (glycerol/urea), GUF (glycerol/urea/formaldehyde) and GF (glycerol/formaldehyde), were synthesized. The resins derived from carboxylic acids had better thermal stability (up to 350 degrees C) than those derived from formaldehyde (up to 200 degrees C). The average molecular weights of the resins were determined by matrix assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) and gel-permeation chromatography (GPC), and are in the range of 1800-2800 Da, being oligomers, and the polydispersity indexes are in the range of 1.3 to 1.8. The H-1 and C-13 nuclear magnetic resonance (NMR) techniques were used to identify the structure of the resins.
引用
收藏
页码：1226 / 1231
页数：6
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