Open Access Published by De Gruyter

Volume 15 Issue 1

Issue of e-Polymers

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Contents
Journal Overview

Publicly Available January 10, 2015

Frontmatter

Page range: i-iii

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Publicly Available January 10, 2015

Editorial

Open Access January 10, 2015

Editorial January 2015

Andreas Greiner, Seema Agarwal

Page range: 1-1

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Review

Open Access January 10, 2015

Design and fabrication of functional polycaprolactone

Tingting Chen, Tongjiang Cai, Qiao Jin, Jian Ji

Page range: 3-13

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Abstract

Functional polycaprolactone (PCL) has great potential for applications in biomedical areas. This review summarizes the recent progress in the chemical synthesis of functional PCL. The functional PCL can be synthesized by (a) homopolymerization or copolymerization of functional ε-caprolactone (ε-CL), (b) copolymerization of 2-methylene-1-3-dioxepane with functional vinyl monomers, or (c) copolymerization of ε-CL with functional carbonate monomers. This review presents the recent trends in the synthesis of functional PCL and its biomedical applications.

Full length articles

Open Access December 2, 2014

Synthesis, characterization, and crystallization of biodegradable poly(ε-caprolactone)-poly(L-lactide) diblock copolymers

Song Luo, Xinyu Peng, Ying Chen, Ting Su, Jun Cao, Sai Li, Bin He

Page range: 15-23

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Abstract

Three diblock copolymers of PCL6k-PLLA2k, PCL6k-PLLA4k, and PCL6k-PLLA6k were prepared and their crystallization behaviors were investigated. The molecular weights of the copolymers calculated from 1 H nuclear magnetic resonance spectra were equivalent to the designed molecular weights. The gel permeation chromatography spectra of the copolymers showed one peak, which revealed that the copolymers were monodisperse. The crystallization capability of poly(ε-caprolactone) (PCL) decreased and that of poly(L-lactide) (PLLA) increased when the molecular weight of the PLLA block was increased from 2k to 6k. PCL spherulites in the PCL6k-PLLA2k copolymer film were smaller than those in PCL6k-PLLA4k or PCL6k-PLLA6k copolymer film. PCL spherulites in the PCL6k-PLLA2k copolymer film grew fastest within all three diblock copolymers. An obvious phase separation phenomenon was observed on the surface of PCL6k-PLLA6k copolymer film in atomic force microscopy images.

Open Access December 20, 2014

Layer-by-layer self-assembly for controlled magnetic multilayer thin film fabrication

Jin Luo, Yanhua Wang, Rong Ren, Weilin Sun, Zhiquan Shen

Page range: 25-32

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Abstract

The copolymer poly[4′-(4-methacryloyphenyl)-2,2′:6′,2″-terpyridine-co- N -(vinylbenzylimino)-diacetic acid] [P(mPhtpy-co-vbda)] was synthesized by the RAFT (reversible addition fragmentation chain transfer) polymerization method and confirmed by Fourier transform infrared spectroscopy and 1 H nuclear magnetic resonance spectroscopy. The bimetallic complexes of the copolymer were prepared by chelating with Nd 3+ and Co 2+ . The magnetic multilayer film was fabricated via layer-by-layer (LbL) self-assembly with the copolymer and metal ions (Nd 3+ and Co 2+ ). Attenuated total reflectance-infrared spectroscopy and UV-Vis spectroscopy were used to characterize the film, indicating that the driving force for fabricating the multilayer film was the coordination interaction. The magnetic behavior of the complexes and the film was measured as a function of the magnetic field strength (0–50 kOe) at 5 K and also of the temperature (5–300 K) at the magnetic field strength (30 kOe). The magnetic hysteresis loops of the complexes and the film showed the typical “S” shape at 5 K, exhibiting the properties of soft ferromagnetic materials.

Open Access January 10, 2015

Synthesis of polyether imidazole ionic liquid and its modification on polypropylene crystal structure and mechanical properties

Liying Guo, Xiuyun Ma, Bin Zhang, Zhiming Wang, Pengcheng Huang

Page range: 33-37

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Abstract

Polyether imidazole ionic liquid (PIIL) was synthesized from N -ethyl iminazole and hydroxyl-terminated polyepichlorhydrin, produced through cationic ring-opening polymerization of epichlorohydrin using Et 2 O·BF 3 as catalyst, and utilized for the modification of polypropylene (PP) by the method of melt blending. The prepared PIIL was characterized by Fourier transform infrared spectroscopy and 1 H nuclear magnetic resonance spectroscopy. The resulting composite of PP and PIIL was characterized by differential scanning calorimetry and X-ray diffraction analyses. With PIIL acting as a nucleating agent, the crystal structure of PP transformed from α to β crystalline form after modification, while crystallization peak temperature was kept unchanged. Comparison test of the mechanical properties of pure PP and PP/PIIL proved that the long flexible chain of PIIL achieved good compatibility with PP and had reinforcing and toughening effects on PP. With the increase of ionic liquid in PP, both the impact strength and the breaking elongation of the PP/PIIL composite were significantly improved.

Open Access December 17, 2014

The stability of covalently immobilization of TEMPO on the polymer surface through ionic liquid linkage: a comparative and model research

Danjie Li, Xianbo Shen, Liang Chen, Huanchang Jiang, Jianli Wang

Page range: 39-44

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Abstract

Covalently immobilizing the active sites or ligands on a polymer surface is an efficient strategy to achieve a full use of expensive organic parts. In this work, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) was anchored onto polystyrene beads through an ether bond or an ionic liquid bridge. We quantitatively compared their thermal stabilities at nitrogen atmosphere and their chemical stabilities in a biphasic oxidation surrounding. It was found that the ionic liquid-bridged TEMPO exhibited an additional advantage of stability and could be reused for 30 consecutive recycles with a conversion ratio above 90% without any significant loss under the condition of the Montanari oxidation system (NaClO/NaBr, CH 2 Cl 2 /water), and the overall reaction time exceeded 2700 min.

Open Access January 10, 2015

Preparation of acrylonitrile/acrylamide copolymer beads via a redox method and their adsorption properties after chemical modification

Siti Nurul Ain Md Jamil, Mastura Khairuddin, Rusli Daik

Page range: 45-54

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Abstract

Poly(acrylonitrile- co -acrylamide) [poly(AN- co - AM)] was prepared via a redox method, with sodium bisulfite and potassium persulphate as the initiators. High yield was attained in up to 76% of monomer conversion within 3 h of reaction time. The copolymers were then chemically modified with hydroxylamine hydrochloride to obtain amidoxime functional groups in the polyacrylonitrile (PAN) system. The role of the amidoxime group is to form a chelating ion-exchange network based on acrylonitrile for the adsorption of heavy metal ions in aqueous solution. Based on the Fourier transform infrared spectra, the appearance of a strong band at the regions of 1680 and 3300–3400 cm -1 due to the stretching vibration of C=O and NH 2 groups, respectively, confirmed the copolymerization of acrylamide into the PAN system. In the case of modified copolymers, there was an appearance of broad bands at the regions of ∼3300 and ∼900 cm -1 , which corresponded to the stretching vibrations of O-H and =N-O, respectively, from the oxime group. The scanning electron microscopy showed that the average size of the copolymer particles was ∼149 nm, and the average size increased to ∼217 nm in the case of the modified copolymer. The amidoximed poly(AN- co -AM) was analyzed by inductively coupled plasma to investigate its adsorption behavior toward Cu(II).

Open Access January 10, 2015

Acrylate copolymer: a rate-controlling membrane in the transdermal drug delivery system

Xiaoping Zhan, Zhenmin Mao, Jian Chen, Yuankui Zhang

Page range: 55-63

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Abstract

A film-like copolymer composed of 2-hydroxy-3-phenoxypropylacrylate, 4-hydroxybutyl acrylate and cyclohexyl methacrylate was synthesized and exploited as a rate-controlling membrane in the transdermal drug delivery systems (TDDs). A series of acrylate copolymers with different formulations were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry and tensile strength, and then evaluated by clonidine hydrochloride transporting through the films. It was found that the formulation M2 composed of three monomers at a ratio of 4:4:2 (w/w/w) showed excellent mechanical and permeation properties. The optimal formulation M2 was further characterized by scanning electron microscopy, contact angles and swelling ratio, and then the permeation behaviors of five different physicochemical drugs transporting through the M2 were evaluated. The results showed that the permeation behaviors were influenced by many factors including the thickness of the membrane, the physicochemical properties of the drugs, the dose of the drugs and the interactions between the drugs and the membrane. This type of copolymer membrane might open new applications in the field of TDDs.

About this journal

e-Polymers is an open access, single-blind peer-reviewed scientific journal. The aim of e-Polymers is to publish, in an ongoing way, pure and applied polymer-science-related original research articles, reviews, and feature articles. It includes synthetic methodologies, characterization, and processing techniques for polymer materials. Reports on interdisciplinary polymer science and on applications of polymers in all areas are welcome.

In 2013 e-Polymers has been transferred from the e-Polymer Foundation to the scientific publisher De Gruyter. Prof. Seema Agarwal and Prof. Andreas Greiner took over as Editors-in-Chief. e-Polymers is dedicated to serve the polymer community and will continue publishing scientific contributions on highest possible standards.

The present Editor-in-Chief, Prof. Seema Agarwal, would like to thank the authors, the reviewers, the editorial staff, the advisory board, and the supporting organization that made e-Polymers a successful and sustainable scientific journal of the polymer community. The Editors of e-Polymers feel very much engaged to provide best publishing services at the highest possible level.

Topics

Pure and Applied Polymer Science
Organic Chemistry
Industrial Chemistry
Polymer Science and Technology

Article formats
Research Article, Review Article, Rapid Communication, Erratum

Information on submission process

Secure archiving by De Gruyter and the independent archiving service Portico

Special Issues:

"Biodegradable and bio-based polymers: Green approaches"
Guest Editors: Dr. Kumaran Subramanian (Sathyabama Institute of Science and Technology, Jeppiaar Nagar, India), Prof. A. Wilson Santhosh Kumar (AMITY University, Mumbai, India), and　Dr. Venkatajothi Ramarao (The Copperbelt University, Ndola, Zambia)

Submission deadline: August 31, 2023

Volume 15 Issue 1

Issue of e-Polymers

Frontmatter

In this Issue

Editorial January 2015

Design and fabrication of functional polycaprolactone

Abstract

Synthesis, characterization, and crystallization of biodegradable poly(ε-caprolactone)-poly(L-lactide) diblock copolymers

Abstract

Layer-by-layer self-assembly for controlled magnetic multilayer thin film fabrication

Abstract

Synthesis of polyether imidazole ionic liquid and its modification on polypropylene crystal structure and mechanical properties

Abstract

The stability of covalently immobilization of TEMPO on the polymer surface through ionic liquid linkage: a comparative and model research

Abstract

Preparation of acrylonitrile/acrylamide copolymer beads via a redox method and their adsorption properties after chemical modification

Abstract

Acrylate copolymer: a rate-controlling membrane in the transdermal drug delivery system

Abstract