Study of the Mechanical and Rheological Behavior of Polymer Materials

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Physics and Theory".

Deadline for manuscript submissions: closed (25 May 2024) | Viewed by 1974

Special Issue Editors

Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety, Zhengzhou, China
Interests: polymer grouting material; nanoscale properties; molecular dynamics simulation
Special Issues, Collections and Topics in MDPI journals
School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China
Interests: polymer grouting diffusion; numerical modeling; grouting reinforcement; intelligent assessment
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Yellow River Laboratory, Underground Engineering Research Institute, Zhengzhou University, Zhengzhou, China
Interests: polymer grouting material; underground infrastructures; mechanical properties; safety assessment; trenchless repair; finite element simulation

Special Issue Information

Dear Colleagues,

Polymer materials are a type of high-molecular-weight material with unique chemical structures and diverse physical and chemical properties. Widely used in fields such as food, medicine, materials, and electronics, the mechanical and rheological properties of polymer materials are among the key characteristics for their applications. In recent years, due to the advantages derived from low density, high corrosion resistance, high waterproofness, and easy manufacturing, polymers have also been widely used in civil and environmental engineering. Therefore, the scientific community must develop a deep understanding of and conduct thorough research into the mechanical and rheological behaviors of polymer materials. To this end, we are launching a Special Issue of Polymers, entitled "Study of the Mechanical and Rheological Behavior of Polymer Materials". This volume aims to explore the mechanical and rheological behavior of polymer materials, promote academic exchange and cooperation, provide a platform for scholars to showcase research results and exchange research ideas, improve scholars' and engineers' understanding and awareness of the mechanical and rheological properties of polymer materials, and provide a more scientific basis to and guidance for the design and application of polymer materials.

Dr. Mingrui Du
Dr. Xueming Du
Dr. Bin Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • polymer properties
  • material characterization and processing
  • applications in engineering
  • sustainable development
  • research methods and analysis
  • biomimetic and tissue engineering
  • drug delivery systems and packaging materials
  • electronic and magnetic materials
  • corrosion resistance and waterproofing

Published Papers (2 papers)

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Research

18 pages, 7018 KiB  
Article
Comprehensive Analysis of Rheological, Mechanical, and Thermal Properties in Poly(lactic acid)/Oxidized Graphite Composites: Exploring the Effect of Heat Treatment on Elastic Modulus
by Mónica Elvira Mendoza-Duarte and Alejandro Vega-Rios
Polymers 2024, 16(3), 431; https://doi.org/10.3390/polym16030431 - 4 Feb 2024
Cited by 1 | Viewed by 906
Abstract
This study is focused on investigating the rheological and mechanical properties of highly oxidized graphite (GrO) incorporated into a poly (lactic acid) (PLA) matrix composite. Furthermore, the samples were annealed at 110 °C for 30 min to study whether GrO concentration has an [...] Read more.
This study is focused on investigating the rheological and mechanical properties of highly oxidized graphite (GrO) incorporated into a poly (lactic acid) (PLA) matrix composite. Furthermore, the samples were annealed at 110 °C for 30 min to study whether GrO concentration has an effect on the elastic modulus (E’) after treatment. The incorporation of GrO into PLA was carried out by employing an internal mixing chamber at 190 °C. Six formulations were prepared with GrO concentrations of 0, 0.1, 0.5, 1, 1.5, and 3 wt%. The thermal stability, thermomechanical behavior, and crystallinity of the composites were evaluated utilizing thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and differential scanning calorimetry DSC, respectively. The thermal stability (according to Tmax) of the PLA/GrO composites did not change substantially compared with PLA. According to DSC, the crystallinity increased until the GrO concentration reached 1 wt% and afterward decreased. Regarding the heat treatment of the PLA/GrO composites, the E’ increased (by two orders of magnitude) at 80 °C with the maximum value achieved at 1 wt% GrO compared with the non-heat-treated composites. Full article
(This article belongs to the Special Issue Study of the Mechanical and Rheological Behavior of Polymer Materials)
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14 pages, 4076 KiB  
Article
Effect of Thermal Aging on Viscoelastic Behavior of Thermosetting Polymers under Mechanical and Cyclic Temperature Impact
by Maxim Mishnev, Alexander Korolev and Alexander Zadorin
Polymers 2024, 16(3), 391; https://doi.org/10.3390/polym16030391 - 31 Jan 2024
Viewed by 724
Abstract
Development of load-bearing fiber reinforced plastic (hereinafter referred to as FRP) composite structures in civil engineering, exploited under high temperatures, such as industrial chimneys and gas ducts, requires the knowledge of their long-term behavior under constant and cyclic mechanical and temperature loads. Such [...] Read more.
Development of load-bearing fiber reinforced plastic (hereinafter referred to as FRP) composite structures in civil engineering, exploited under high temperatures, such as industrial chimneys and gas ducts, requires the knowledge of their long-term behavior under constant and cyclic mechanical and temperature loads. Such conditions mean that the viscoelasticity of FRP should be considered along with the thermal aging effect. This research is devoted to the effects of thermal aging on the viscoelastic behavior of polymers. Two sets of experiments were conducted: creep tensile tests and cyclic heating in a constrained state. The Kelvin–Voigt viscoelasticity model was used to determine the rheological parameters of binder from experimental creep curves. Cyclic heating was used to compare the behavior of normal and thermally aged binders and to evaluate the possibility of temperature stress accumulation. Fourier-transform infrared spectroscopy was used for polymer’s structural changes investigation. Both tests showed that non-aged glassed polymer (hereinafter referred to as GP) was prone to viscoelastic behavior, while the thermally aged GP lost viscosity and worked almost perfectly elastic. It was assumed that long heat treatment had caused changes in the inner structure of the GP, reducing the number of weak bonds and increasing the number of elastic ones. Therefore, the results show that the designing of FRP structures, exploited under thermomechanical load, requires using the elastic model while taking into account the properties of FRP after long-term heat treatment. Full article
(This article belongs to the Special Issue Study of the Mechanical and Rheological Behavior of Polymer Materials)
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