Correlation between stabilizer consumption and degree of polymerization of thermally upgraded paper aged in insulating natural ester and insulating mineral oil

被引：3
|
作者：
Mildemberger, Larissa [1 ,2 ]
Andreoli, Mario Carlos [3 ]
da Silva, Guilherme Cunha [1 ]
da Motta, Heloisa Nunes [1 ]
Gulmine, Joseane Valente [1 ]
Munaro, Marilda [1 ,2 ]
机构：
[1] Inst Tecnol Desenvolvimento LACTEC, Curitiba, Parana, Brazil
[2] Univ Fed Parana UFPR, Programa Posgrad Engn & Ciencia Mat PIPE, Curitiba, Parana, Brazil
[3] CTEEP, Sao Paulo, SP, Brazil
来源：
POLIMEROS-CIENCIA E TECNOLOGIA | 2016年 / 26卷 / 01期
关键词：
thermally upgraded paper; thermal degradation; insulating natural ester; insulating mineral oil; CHAIN-END GROUPS; CELLULOSE INSULATION; DEPOLYMERIZATION; METHANOL; KINETICS;
D O I：
10.1590/0104-1428.2003
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Insulating paper holds significant importance in the insulation system of power transformers, and thus, its degradation is the subject of many studies. A successful evaluation of the degradation rate of such paper contributes to reducing downtime and avoiding equipment failure. In this work, samples of thermally upgraded paper were thermally aged in insulating natural ester (INE) and insulating mineral oil (IMO) and were evaluated by degree of polymerization (DP) and FTIR-ATR. It was possible to identify characteristic bands of dicyandiamide, an inhibitory compound of the thermal degradation of the paper, and to establish a correlation between the decrease in DP and the consumption of dicyandiamide during aging, which was observed to develop in three distinct steps for both IMO and INE.
引用
收藏
页码：61 / 65
页数：5
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