Depolymerization of Waste Polyethylene Terephthalate - PET: Effects of Surfactants and Excess of Alkaline Solutions

被引：10
|
作者：
Di Souza, Luiz [1 ]
Torres, Maria Conceicao M. [1 ]
Ruvolo Filho, Adhemar C. [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Quim, Ctr Ciencias Exatas & Tecnol, Grp Processamento & Propriedades Polimeros, BR-13560905 Sao Carlos, SP, Brazil
来源：
POLIMEROS-CIENCIA E TECNOLOGIA | 2008年 / 18卷 / 04期
关键词：
Recycling; PET; depolymerization; tensoatives;
D O I：
10.1590/S0104-14282008000400013
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 depolymerization of waste polyethylene terephthalate (PET) in aqueous solutions 7.5 M of sodium hydroxide was tested at 100 degrees C and 1 atm, in order to obtain the terephthalic acid monomers (TPA). The effect from surfactants and concentration of sodium hydroxide (NaOH) on the reaction extent of depolymerization was studied quantitatively by gravimetric and thermal measurements. Excess of alkaline solution catalyze the reaction and doubled the reaction rate with larger particle size PET. The surfactants DDS and Tween are efficient in catalyzing larger particle size PET under equimolar conditions, but do not affect the reactions under excess of alkaline solution.
引用
收藏
页码：334 / 340
页数：7
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