Evidence map›Paper›PMID 35890697›Full record

ArticlePolymers2022

A Modified Langmuir Model for Moisture Diffusion in UGFRE of Composite Insulator Considering the Composite Degradation.

Zhikang Yuan, Cheng Wang, Lijun Jin, Youping Tu, Yingyao Zhang, Zhenlian An, Yongfei Zhao

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Polymers, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Zhikang YuanDepartment of Electrical Engineering, College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China.ORCID 0000-0003-1877-4402
Cheng WangState Grid Hunan Extra High Voltage Substation Company, Changsha 410004, China.
Lijun JinDepartment of Electrical Engineering, College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China.
Youping TuState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China.
Yingyao ZhangDepartment of Electrical Engineering, College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China.
Zhenlian AnDepartment of Electrical Engineering, College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China.
Yongfei ZhaoState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China.

Funding

National Natural Science Foundation of China U1966210Shanghai Sailing Program 22YF1450300
6 · The paper itself

Abstract

Water invasion induced aging and degradation of the unidirectional glass fiber reinforced epoxy resin (UGFRE) rod is inferred as the primary reason for the decay-like fracture of the composite insulator. In this paper, the moisture diffusion processes in the UGFRE from different directions at various test humidities and temperatures are studied. The moisture diffusion of the UGFRE sample obeys the Langmuir diffusion law under the humidity conditions of 53%, 82% and 100% at 40 °C. In deionized water, the moisture diffusion of the UGFRE sample also obeys the Langmuir diffusion law when the invading direction is vertical to the glass fiber. However, when the water invades the UGFRE sample, parallel with the glass fiber, the weight loss caused by composite degradation should not be neglected. A modified Langmuir model, taking Arrhenius Theory and the nonlinear aging characteristic of the composite into consideration, is proposed and can successfully describe the moisture diffusion process. Both the glass fibers and epoxy resin will degrade in the deionized water. The glass fibers show better resistance to degradation than the epoxy resin. The epoxy resin degrades from the glass fiber/epoxy resin interface and become fragments. For composite insulators, the water invasion through the ends should be avoided as far as possible, or the degradation of the UGFRE rod will result in decay-like fracture.

Indexed as

composite degradationmodified Langmuir modelmoisture diffusionunidirectional glass fiber reinforced epoxy resin (UGFRE)

Identifiers

PMID35890697
PMCPMC9324177

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