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Polymers
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Reversible-Deactivation Radical Polymerization
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Reversible-Deactivation Radical Polymerization

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

Deadline for manuscript submissions: closed (31 May 2019) | Viewed by 29465

Special Issue Editor

Prof. Dr. Chih-Feng Huang

E-Mail Website
Guest Editor
Department of Chemical Engineering, i-Center for Advanced Science and Technology (iCAST), National Chung Hsing University, Taichung 40227, Taiwan
Interests: living polymerizations; nanocomposites; biomaterial modifications; stimuli-responsive polymers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the development of reversible-deactivation radical polymerization (RDRP), many robust tools have been provided via various mechanisms, such as catalytic reversible by atom transfer (including atom transfer radical polymerization (ATRP)), degenerative transfer polymerization (including reversible addition-fragmentation chain transfer (RAFT) polymerization and reversible iodine transfer polymerization (RITP)), and stable free radical polymerization (including nitroxide-mediated polymerization (NMP) and organometallic radical polymerization (OMRP)), as well as latterly developed organo-stibine/-tellurium/-bismuthine radical polymerizations (SBRP/TERP/BIRP). 

This Special Issue aims to provide a comprehensive collection of the latest developments of RDRPs, covering synthesis, mechanism investigation, theoretical modelling, characterization, and applications toward various functional materials. The topic may also extend to other newly-developed living polymerization techniques, stimuli-responsive polymers, shape memory materials, sensors, (tough) hydrogels, self-healing materials/vitrimers, bio-based polymers, biomacromolecules, and nanocomposites. Regular original papers and reviews are both welcome.

Prof. Chih-Feng Huang
Guest Editor

Manuscript Submission Information

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Keywords

  • Reversible-deactivation radical polymerizations
  • Stimuli-responsive polymers
  • Shape-memory polymers
  • Self-healing materials
  • Hydrogels
  • Biomacromolecules
  • Nanocomposites

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Published Papers (2 papers)

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Research

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13 pages, 6141 KiB  
Article
Synthesis of Poly(N-vinylpyrrolidone)-Based Polymer Bottlebrushes by ATRPA and RAFT Polymerization: Toward Drug Delivery Application
by Yi-Shen Huang, Jem-Kun Chen, Shiao-Wei Kuo, Ya-An Hsieh, Shota Yamamoto, Jun Nakanishi and Chih-Feng Huang
Polymers 2019, 11(6), 1079; https://doi.org/10.3390/polym11061079 - 22 Jun 2019
Cited by 19 | Viewed by 6466
Abstract
Atom transfer radical polyaddition (ATRPA) was utilized herein to synthesize a specific functional polyester. We conducted ATRPA of 4-vinylbenzyl 2-bromo-2-phenylacetate (VBBPA) inimer and successfully obtained a linear type poly(VBBPA) (PVBBPA) polyester with benzylic bromides along the backbone. To obtain a novel amphiphilic polymer [...] Read more.
Atom transfer radical polyaddition (ATRPA) was utilized herein to synthesize a specific functional polyester. We conducted ATRPA of 4-vinylbenzyl 2-bromo-2-phenylacetate (VBBPA) inimer and successfully obtained a linear type poly(VBBPA) (PVBBPA) polyester with benzylic bromides along the backbone. To obtain a novel amphiphilic polymer bottlebrush, however, the lateral ATRP chain extension of PVBBPA with N-vinyl pyrrolidone (NVP) met the problem of quantitative dimerization. By replacing the bromides to xanthate moieties efficiently, we thus observed a pseudo linear first order reversible addition–fragmentation chain transfer (RAFT) polymerization to obtain novel poly(4-vinylbenzyl-2-phenylacetate)-g-poly(NVP) (PVBPA-g-PNVP) amphiphilic polymer bottlebrushes. The critical micelle concentration (CMC) and particle size of the amphiphilic polymer bottlebrushes were characterized by fluorescence spectroscopy, dynamic light scattering (DLS), and scanning electron microscopy (SEM) (CMCs < 0.5 mg/mL; particle sizes = ca. 100 nm). Toward drug delivery application, we examined release profiles using a model drug of Nile red at different pH environments (3, 5, and 7). Eventually, low cytotoxicity and well cell uptake of the Madin-Darby Canine Kidney Epithelial (MDCK) for the polymer bottlebrush micelles were demonstrated. Full article
(This article belongs to the Special Issue Reversible-Deactivation Radical Polymerization)
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Review

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44 pages, 21139 KiB  
Review
Lignin Biopolymers in the Age of Controlled Polymerization
by Mitra S. Ganewatta, Hasala N. Lokupitiya and Chuanbing Tang
Polymers 2019, 11(7), 1176; https://doi.org/10.3390/polym11071176 - 12 Jul 2019
Cited by 149 | Viewed by 21903
Abstract
Polymers made from natural biomass are gaining interest due to the rising environmental concerns and depletion of petrochemical resources. Lignin isolated from lignocellulosic biomass is the second most abundant natural polymer next to cellulose. The paper pulp process produces industrial lignin as a [...] Read more.
Polymers made from natural biomass are gaining interest due to the rising environmental concerns and depletion of petrochemical resources. Lignin isolated from lignocellulosic biomass is the second most abundant natural polymer next to cellulose. The paper pulp process produces industrial lignin as a byproduct that is mostly used for energy and has less significant utility in materials applications. High abundance, rich chemical functionalities, CO2 neutrality, reinforcing properties, antioxidant and UV blocking abilities, as well as environmental friendliness, make lignin an interesting substrate for materials and chemical development. However, poor processability, low reactivity, and intrinsic structural heterogeneity limit lignins′ polymeric applications in high-performance advanced materials. With the advent of controlled polymerization methods such as ATRP, RAFT, and ADMET, there has been a great interest in academia and industry to make value-added polymeric materials from lignin. This review focuses on recent investigations that utilize controlled polymerization methods to generate novel lignin-based polymeric materials. Polymers developed from lignin-based monomers, various polymer grafting technologies, copolymer properties, and their applications are discussed. Full article
(This article belongs to the Special Issue Reversible-Deactivation Radical Polymerization)
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