Special Issue "Feature Papers in Macromolecular Crystals"

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Macromolecular Crystals".

Deadline for manuscript submissions: closed (31 October 2021).

Special Issue Editors

Prof. Dr. Jesús Sanmartín-Matalobos
E-Mail Website
Guest Editor
Inorganic Chemistry Department, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
Interests: supramolecular chemistry; coordination chemistry; single crystal X-ray crystallography; H-bonding; chirality; fluorescence
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Eamor M. Woo
E-Mail Website1 Website2
Guest Editor
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
Interests: polymer crystallization and morphology; self-assembly; photonic crystals; biodegradable polymers; nanocomposites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Section Macromolecular Crystals of Crystals provides a forum to report advancements in the understanding of the synthesis, nucleation, growth, processing, structure, properties, and applications of all classes of non-natural macromolecules, such as inorganic and organic polymers, or inorganic and organic large non-polymeric molecules.

The aim of this Special Issue on “Featured Papers in Macromolecular Crystals” is to make known relevant works to our colleagues in the macromolecular crystals field. To achieve this, the Special Issue edited by Jesús Sanmartín-Matalobos and Eamor M. Woo is inviting prominent scientists in the field to submit research articles, review articles as well as short communications focused on the synthesis, crystallization, characterization, properties, and theoretical aspects of macromolecular crystalline materials. The coverage of topics of this Special Issue is as broad as that of the Section Macromolecular Crystals, ranging from the synthesis, nucleation, growth, processing, and characterization of macromolecular crystalline materials to the mechanical, chemical, electrical, magnetic, catalytic, optical, and self-assembly properties, as well as their diverse applications. Among many other subject areas, the Section Macromolecular Crystals includes plastics, synthetic fibres, synthetic rubber, graphene carbon nanotubes, supramolecular polymers, polymer composites, metal coordination polymers, hybrid polymeric materials, metal–organic frameworks (MOFs), polymer–MOF hybrid materials, macrocycles, macrocyclic metal complexes, liquid crystals, and eutectic molecular liquids.

Therefore, we look forward to your valued contributions to make this Special Issue a reference resource of featured knowledge for future researchers in the Macromolecular Crystals field.

Prof. Dr. Jesús Sanmartín-Matalobos
Prof. Dr. Eamor M. Woo
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 papers will be 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. Crystals is an international peer-reviewed open access monthly 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 1800 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

  • plastics
  • synthetic fibers
  • synthetic rubber
  • hybrid polymeric materials
  • eutectic molecular liquids
  • graphene carbon nanotubes
  • polymer composites
  • metal coordination polymers
  • metal–organic frameworks
  • macrocycles and macrocyclic metal complexes

Published Papers (3 papers)

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Research

Article
In-Situ Growth of Nucleus Geometry to Dual Types of Periodically Ringed Assemblies in Poly(nonamethylene terephthalate)
Crystals 2021, 11(11), 1338; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst11111338 - 02 Nov 2021
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Abstract
Monitoring of nucleus geometry and growth into dual types of periodically ring-banded morphology in poly(nonamethylene terephthalate) (PNT), respectively, Type-1 and Type-2, are done with detailed analyses using polarized-light optical microscopy (POM) in-situ CCD recording; the periodic assembly morphologies are characterized using atomic-force microscopy [...] Read more.
Monitoring of nucleus geometry and growth into dual types of periodically ring-banded morphology in poly(nonamethylene terephthalate) (PNT), respectively, Type-1 and Type-2, are done with detailed analyses using polarized-light optical microscopy (POM) in-situ CCD recording; the periodic assembly morphologies are characterized using atomic-force microscopy (AFM) and scanning electron microscopy (SEM). Different annealing treatments (Tmax = 110, 120, 130 °C) are accomplished at a crystallization temperature of 85 °C; effects on the nucleus geometry, number (25–10%) and volume fractions (33–15%) of Type-2 among two types of banded PNT spherulites are expounded. Growth of a specific type of periodically banded PNT spherulite is initiated from either highly elongated sheaf-like or well-rounded nuclei, with the final grown lamellae being self-packed as multi-shell structures. Nucleation geometry and crystallization parameters collectively lead to development of multiple types of banded PNT spherulites of different relative fractions. Full article
(This article belongs to the Special Issue Feature Papers in Macromolecular Crystals)
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Article
Crystallization Behaviors of Composites Comprising Biodegradable Polyester and Functional Nucleation Agent
Crystals 2021, 11(10), 1260; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst11101260 - 18 Oct 2021
Viewed by 328
Abstract
In this study, a thorough study of the crystallization behaviors of the biodegradable polymer composites of poly(ethylene succinate) (PESu) and hexagonal boron nitride (h-BN) was carried out. We found that h-BN had a significant nucleation effect on crystallization behaviors. DSC isothermal crystallization results [...] Read more.
In this study, a thorough study of the crystallization behaviors of the biodegradable polymer composites of poly(ethylene succinate) (PESu) and hexagonal boron nitride (h-BN) was carried out. We found that h-BN had a significant nucleation effect on crystallization behaviors. DSC isothermal crystallization results demonstrated that the crystallization time of the PESu/h-BN composites became shorter after adding h-BN. The rate constant k values calculated from the Avrami equation were larger for the composites, demonstrating that PESu’s crystallization rate was increased by adding h-BN. TEM and SEM images showed the well-dispersed h-BN in the PESu matrix. Optical microscopy revealed that the PESu/h-BN composites formed more and smaller spherulites than neat PESu did, which confirmed that h-BN caused the nucleation effect. H-BN also accelerated non-isothermal crystallization kinetics. We discussed the behaviors of the Mo model, which demonstrated that h-BN promoted the kinetics of non-isothermal crystallization. The XRD diffraction patterns showed that h-BN in the composites would not obviously change the crystalline structure of PESu. Full article
(This article belongs to the Special Issue Feature Papers in Macromolecular Crystals)
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Communication
Enhancement of Crystallization Behaviors in Quaternary Composites Containing Biodegradable Polymer by Supramolecular Inclusion Complex
Crystals 2020, 10(12), 1137; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst10121137 - 12 Dec 2020
Viewed by 749
Abstract
Novel multi-component composites composed of the biodegradable polymer poly(ethylene adipate) (PEA), the water-soluble polymer poly(ethylene oxide) (PEO), poly(vinyl acetate) (PVAc), and a supramolecular-like inclusion complex (IC) made by α-cyclodextrin (α-CD) and poly(ε-caprolactone) (PCL) (coded as PCL–CD–IC) are discussed in this work. The PCL–CD–IC [...] Read more.
Novel multi-component composites composed of the biodegradable polymer poly(ethylene adipate) (PEA), the water-soluble polymer poly(ethylene oxide) (PEO), poly(vinyl acetate) (PVAc), and a supramolecular-like inclusion complex (IC) made by α-cyclodextrin (α-CD) and poly(ε-caprolactone) (PCL) (coded as PCL–CD–IC) are discussed in this work. The PCL–CD–IC was used to increase the crystallization rate of the miscible PEA/PEO/PVAc ternary blend that crystalized slower than neat PEA. Higher resolution SEM and TEM images displayed that PCL–CD–IC did not assemble notably in the quaternary composites. For the results of isothermal crystallization, the analysis of the Avrami equation demonstrated that the rate constant k increased with the addition of PCL–CD–IC in the composites, suggesting that PCL–CD–IC provided more nucleation sites to promote the crystallization rate. The nucleation density increased with the addition of PCL–CD–IC, and the amount of spherulite also increased. Wide angle X-ray results showed that the composites displayed similar diffraction patterns to neat PEA, meaning PEO, PVAc, and PCL–CD–IC would not change the crystal structures of PEA in the composites. The PCL–CD–IC, the supramolecular nucleation agent, demonstrated its superior ability to enhance the multi-component composites of biodegradable polymer in this study. Full article
(This article belongs to the Special Issue Feature Papers in Macromolecular Crystals)
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