Next Article in Journal
Preparation and Evaluation of Core–Shell Magnetic Molecularly Imprinted Polymers for Solid-Phase Extraction and Determination of Sterigmatocystin in Food
Previous Article in Journal
A Concise Synthesis of Three Branches Derived from Polysaccharide RN1 and Anti-Pancreatic Cancer Activity Study
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Polymers 2017, 9(10), 537; https://doi.org/10.3390/polym9100537

Effect of Moisture on Mechanical Properties and Thermal Stability of Meta-Aramid Fiber Used in Insulating Paper

1
,
1,2,* , 1
and
1
1
College of Engineering and Technology, Southwest University, Chongqing 400715, China
2
School of Electronics and Computer Science, University of Southampton, SO171BJ Southampton, UK
*
Author to whom correspondence should be addressed.
Received: 19 September 2017 / Revised: 13 October 2017 / Accepted: 18 October 2017 / Published: 22 October 2017
View Full-Text   |   Download PDF [4765 KB, uploaded 22 October 2017]   |  

Abstract

Seven composite models of meta-aramid fibers with different moisture contents were studied using molecular dynamics simulation. The effects of moisture on the thermal stability and mechanical properties of the fibers and their mechanisms were analyzed, considering characteristics such as hydrogen bonding, free volume, mean square displacement, and mechanical parameters. The simulation results showed that the large number of hydrogen bonds between water molecules and meta-aramid fibers destroyed the original hydrogen-bond network. Hydrogen bonds between the molecular chains of meta-aramid fibers were first destroyed, and their number decreased with increasing moisture content. The free volume of the fibers thereby increased, the interactions between fiber chains weakened with increasing moisture content, and the fiber chain movement intensified accordingly. The ratio of diffusion coefficients of the water molecules to moisture contents of the composite models increased linearly, and the water molecule diffusion increased, which accelerated the rate of damage to the original hydrogen-bond network of the meta-aramid fibers and further reduced their thermal stability. In general, the mechanical properties of the composites were negatively related to their moisture content. View Full-Text
Keywords: meta-aramid fibers; moisture; hydrogen bond; mean square displacement; free volume meta-aramid fibers; moisture; hydrogen bond; mean square displacement; free volume
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Yin, F.; Tang, C.; Li, X.; Wang, X. Effect of Moisture on Mechanical Properties and Thermal Stability of Meta-Aramid Fiber Used in Insulating Paper. Polymers 2017, 9, 537.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top