Functional, High Modulus Polymer Based Organic/Inorganic Composites

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

Deadline for manuscript submissions: closed (31 October 2020) | Viewed by 4486

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Department of Fiber and Composite Materials, Feng Chia University, Taichung 40768, Taiwan
Interests: biomaterials, nano-materials, green textiles, polymer hybrid composites, high performance polymer composites, and medical and health protection composites
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Special Issue Information

Dear Colleagues,

Functional, high-modulus polymer-based composites have been widely used for diversified applications in various fields, such as aerospace, individual protection, transportation, and energy. They present excellent mechanical properties as well as functionalities, i.e., flame-retardancy, electromagnetic shielding or absorption, sound absorption, etc. In addition, by controlling the form and/or content of functional filler, composite structure design, and polymer selection, the specific functionality can be tailored. This Special Issue, Functional, High Modulus Polymer Based Organic/Inorganic Composites, seeks high-quality works and topics focusing, among others, on innovation structure design, advanced preparation techniques, and reliable simulation of high-modulus polymer-based composites with high mechanical property and/or functionality.

Prof. Dr. Jia-Horng Lin
Guest Editor

Manuscript Submission Information

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Published Papers (1 paper)

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Research

13 pages, 2560 KiB  
Article
Thermally Tunable Dynamic and Static Elastic Properties of Hydrogel Due to Volumetric Phase Transition
by Yuqi Jin, Teng Yang, Shuai Ju, Haifeng Zhang, Tae-Youl Choi and Arup Neogi
Polymers 2020, 12(7), 1462; https://doi.org/10.3390/polym12071462 - 30 Jun 2020
Cited by 25 | Viewed by 4133
Abstract
The temperature dependence of the mechanical properties of polyvinyl alcohol-based poly n-isopropyl acrylamide (PVA-PNIPAm) hydrogel was studied from the static and dynamic bulk modulus of the material. The effect of the temperature-induced volumetric phase transition on Young’s Modulus, Poisson’s ratio, and the density [...] Read more.
The temperature dependence of the mechanical properties of polyvinyl alcohol-based poly n-isopropyl acrylamide (PVA-PNIPAm) hydrogel was studied from the static and dynamic bulk modulus of the material. The effect of the temperature-induced volumetric phase transition on Young’s Modulus, Poisson’s ratio, and the density of PVA-PNIPAm was experimentally measured and compared with a non-thermo-responsive Alginate hydrogel as a reference. An increase in the temperature from 27.5 to 32 °C results in the conventional temperature-dependent de-swelling of the PVA-PNIPAm hydrogel volume of up to 70% at the lower critical solution temperature (LCST). However, with the increase in temperature, the PVA-PNIPAm hydrogel showed a drastic increase in Young’s Modulus and density of PVA-PNIPAm and a corresponding decrease in the Poisson’s ratio and the static bulk modulus around the LCST temperature. The dynamic bulk modulus of the PVA-PNIPAm hydrogel is highly frequency-dependent before the LCST and highly temperature-sensitive after the LCST. The dynamic elastic properties of the thermo-responsive PVA-PNIPAm hydrogel were compared and observed to be significantly different from the thermally insensitive Alginate hydrogel. Full article
(This article belongs to the Special Issue Functional, High Modulus Polymer Based Organic/Inorganic Composites)
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