Special Issue "State of the Art and Perspectives of Polymer Science and Technology in China"

A special issue of Polymers (ISSN 2073-4360).

Deadline for manuscript submissions: 15 January 2024 | Viewed by 1148

Special Issue Editors

Department of Polymer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: microphase separation and self-assembly in multicomponent polymer systems; synthesis and characterization of polyhedral oligomeric silsesquioxane (POSS) monomers and POSS-containing polymers; shape memory, self-healing, and reprocessing properties of polymers; dynamics of polymers in bulk by solid NMR spectroscopy (1H, 13C, 29Si, 15N and 2H NMR)
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College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Interests: TiO2-based functional materials; surface and interface; biomimetics; water treatment; energy storage and conversion
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China
Interests: nanofibers; UHMWPE fibers; electrospinning; gel spinning; 3D printing; polymer composites; water treatment; biomaterials; energy storage materials
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Special Issue Information

Dear Colleagues,

Polymer science and technology have developed rapidly over the past decade. Aiming at highlighting the state-of-the-art polymer research in China, we are now pleased to announce that the journal of Polymers is compiling an exclusive collection of papers from academicians and outstanding scholars in China.

This Special Issue will focus on the design, synthesis, performance, and application advances of polymers, new experimental discoveries, and novel technological improvements, with the objective to provide a comprehensive overview of state-of-the-art polymer science and engineering in China.

Because of your renowned expertise in this field, we cordially invite you to contribute a paper to this Special Issue. Full papers, communications, and reviews are all welcome. We expect these papers to be widely read and highly influential. All papers in this Special Issue will be well promoted.

Prof. Dr. Sixun Zheng
Prof. Dr. Yuekun Lai
Dr. Wei Zhang
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.

Published Papers (1 paper)

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Research

Article
Melt Memory Effect in Polyethylene Random Terpolymer with Small Amount of 1-Octene and 1-Hexene Co-Units: Non-Isothermal and Isothermal Investigations
Polymers 2023, 15(7), 1721; https://doi.org/10.3390/polym15071721 - 30 Mar 2023
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Abstract
Homo-polymers of reasonable molecular weight relax very fast in the molten state. Starting from a semi-crystalline structure, when the homo-polymer is heated up to a temperature higher than its nominal melting temperature, it relaxes quickly into a homogenous molten state. The following crystallization [...] Read more.
Homo-polymers of reasonable molecular weight relax very fast in the molten state. Starting from a semi-crystalline structure, when the homo-polymer is heated up to a temperature higher than its nominal melting temperature, it relaxes quickly into a homogenous molten state. The following crystallization temperature during cooling remains constant irrespective of the melt temperature. However, the situation is evidently different in copolymers. A phenomenon named the crystallization melt memory effect denotes an increased crystallization rate during cooling after a polymer was melted at different temperatures, which is often observed. The melt temperature can be even higher than the equilibrium melting temperature of the corresponding polymer crystals. In this work, we investigated such memory effect in a polyethylene random terpolymer with a small fraction of 1-octene and 1-hexene co-units using differential scanning calorimetry techniques. Both non-isothermal and isothermal protocols were employed. In non-isothermal tests, a purposely prepared sample with well defined thermal history (the sample has been first conditioned at 200 °C for 5 min to eliminate the thermal history and then cooled down to −50 °C) was melted at different temperatures, followed by a continuous cooling at a constant rate of 20 °C/min. Peak crystallization temperature during cooling was taken to represent the crystallization rate. Whereas, in isothermal tests, the same prepared sample with well defined thermal history was cooled to a certain crystallization temperature after being melted at different temperatures. Here, time to complete the isothermal crystallization was recorded. It was found that the results of isothermal tests allowed us to divide the melt temperature into four zones where the features of the crystallization half time change. Full article
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