Dispersion, Assembly and Crystallization of Functional Components within 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 (28 February 2021) | Viewed by 4636

Special Issue Editor


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Guest Editor
Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan
Interests: epitaxial crystallization and organic/inorganic hybrid composites; green energy materials; liquid crystalline materials; organic optoelectronic materials; phase behavior, organization of organic molecules, and polymer physics; wide angle X-ray diffraction and small-angle scattering; polymer composites and solid state physics

Special Issue Information

Dear Colleagues,

The addition and mixing of function ingredients have been commonly adopted as an approach to enhance the properties and performance of polymer materials. Nevertheless, for functional components, like 2D molecules, inorganic crystals, and carbon allotropes, the difficulties of uniform dispersion and guided organization within materials have been the bottleneck for their unique merits to be fully harvested. This challenge has lasted for decades and remains unsolved. For additional functional components with their own chemical affinities and ordering tendencies, the assembly and crystallization are likely to advance in disparate manners upon the interactions with surrounding polymer matrix. Furthermore, phase behaviours and habits of ordering organization of host polymers are to be modified as well due to the presence of foreign components. Within multi-components materials, the interplays of involved ordering behaviours are not very clear still, and nevertheless are acknowledged able to largely adjust materials structures and properties. Studying these involved interplays should lead us to understand new knowledge and approaches of crystal engineering to develop new hybrid materials structures with desired properties unachievable by conventional materials.

This special issues of Polymers thus aims at enhancing the discussion and sharing of current progresses, discoveries, and analyses of various aspects of polymer hybrids. In addition to fundamental physics behind the evolution of hybrid materials, the studies on the changes and improvement of mechanical, optical, and electrical properties behind evolved materials structures are also pursued by this special issues. Both organic and inorganic materials have unique merits, and the strategies and knowledge able to let these merits synergistically function should illustrate the approach of creating useful hybrid materials for advanced applications.

Considering your prominent contribution in this interesting research field, I would like to cordially invite you to submit a paper to this special issue through the webpage of the journal. Research articles, review articles, perspectives, as well as communications and letters are also invited. A guide for authors and other relevant information for submission of manuscripts are available on the journal’s website. Thank you for sharing your research and knowledge with us.

Prof. Jr-Jeng Ruan
Guest Editor

Manuscript Submission Information

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Keywords

  • 2D materials
  • carbon nanotube
  • graphene
  • inorganic precursor
  • graphene oxide
  • methanofullerene
  • phase behavior and crystallization
  • organic/inorganic hybrid composites
  • organic optoelectronic materials

Published Papers (2 papers)

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Research

23 pages, 11524 KiB  
Article
Task-Specific Ionic Liquids with Lactate Anion Applied to Improve ZnO Dispersibility in the Ethylene-Propylene-Diene Elastomer
by Anna Sowińska, Magdalena Maciejewska, Laina Guo and Etienne Delebecq
Polymers 2021, 13(5), 774; https://doi.org/10.3390/polym13050774 - 3 Mar 2021
Cited by 7 | Viewed by 1706
Abstract
Task-specific ionic liquids (TSILs) are ionic liquids with structures and, consequently, properties and behaviors designed for particular applications. In this work, task-specific ILs with alkylammonium or benzalkonium cations and carboxyl groups in the form of lactate anions were used to promote the homogeneous [...] Read more.
Task-specific ionic liquids (TSILs) are ionic liquids with structures and, consequently, properties and behaviors designed for particular applications. In this work, task-specific ILs with alkylammonium or benzalkonium cations and carboxyl groups in the form of lactate anions were used to promote the homogeneous dispersion of the curatives in the elastomer matrix. The reaction of carboxyl groups of TSILs with zinc oxide, which acts as a vulcanization activator, was confirmed. This interaction improved the solubility and dispersibility of zinc oxide particles in the ethylene-propylene-diene (EPDM) monomer matrix, which consequently affected the curing characteristics of rubber compounds. Most importantly, TSILs increased the efficiency of vulcanization by shortening the time, lowering the temperature and increasing the enthalpy of this process, while maintaining safe processing of elastomer composites. EPDM vulcanizates containing TSILs with lactate anion were characterized by satisfactory functional properties. Full article
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12 pages, 3267 KiB  
Article
Effect of Neutralizer on Transparency of Nucleating Agent-Containing Polypropylene
by Shohei Iwasaki, Yohei Uchiyama, Miwa Tenma and Masayuki Yamaguchi
Polymers 2021, 13(5), 680; https://doi.org/10.3390/polym13050680 - 24 Feb 2021
Cited by 6 | Viewed by 2432
Abstract
The effects of neutralizer species on the transparency of injection-molded plates were studied using isotactic polypropylene (PP) containing a crystal nucleating agent—i.e., 1,3:2,4-bis-o-(4-methylbenzylidene)-d-sorbitol (MDBS). A plate containing lithium stearate (StLi) was more transparent than one containing calcium stearate (StCa) [...] Read more.
The effects of neutralizer species on the transparency of injection-molded plates were studied using isotactic polypropylene (PP) containing a crystal nucleating agent—i.e., 1,3:2,4-bis-o-(4-methylbenzylidene)-d-sorbitol (MDBS). A plate containing lithium stearate (StLi) was more transparent than one containing calcium stearate (StCa) when the MDBS content was 0.1 wt. %. The addition of StLi accelerated the formation of MDBS fibers and the crystallization of PP. However, when the MDBS content was 1.0 wt. %, StCa improved the transparency more effectively than StLi. These results indicate that the combination of an appropriate amount of MDBS and the correct neutralizer species is critical for enhancing the transparency of injection-molded PP plates. Full article
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