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Polymers, Volume 13, Issue 5

March-1 2021 - 172 articles

Cover Story: Recently, innovative techniques and scientific research have promoted biopolymers as the primary alternative to traditional plastics, raising and expanding global bioplastic production/research. Due to its biological and functional attributes, chitosan has been substantially explored as a biopolymeric matrix. Nevertheless, its hydrophilicity and weak mechanical properties represent a significant industrial restriction. Distinct methodologies have been utilized to upgrade these properties, such as nanoreinforcement with organic or inorganic nanoparticles or with crosslinkers. This review analyzes recent works that combine the action of different nanoparticle types with chitosan films to understand how they interfere with the bionanocomposites' mechanical and barrier properties. View this paper.
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Articles (172)

  • Article
  • Open Access
13 Citations
5,604 Views
16 Pages

Mechanical Properties of a Supramolecular Nanocomposite Hydrogel Containing Hydroxyl Groups Enriched Hyper-Branched Polymers

  • Wenjin Xing,
  • Amin Jamshidi Ghahfarokhi,
  • Chaoming Xie,
  • Sanaz Naghibi,
  • Jonathan A. Campbell and
  • Youhong Tang

6 March 2021

Owing to highly tunable topology and functional groups, hyper-branched polymers are a potential candidate for toughening agents, for achieving supramolecular interactions with hydrogel networks. However, their toughening effects and mechanisms are no...

  • Review
  • Open Access
36 Citations
7,498 Views
32 Pages

Expanding Monomers as Anti-Shrinkage Additives

  • Philipp Marx and
  • Frank Wiesbrock

6 March 2021

Commonly, volumetric shrinkage occurs during polymerizations due to the shortening of the equilibrium Van der Waals distance of two molecules to the length of a (significantly shorter) covalent bond. This volumetric shrinkage can have severe influenc...

  • Article
  • Open Access
17 Citations
4,310 Views
23 Pages

6 March 2021

A computational framework based on novel differential effective medium approximation and mean-field homogenization is used to design high-performance filler-laden polymer thermal interface materials (TIMs). The proposed design strategy has the capabi...

  • Article
  • Open Access
12 Citations
3,567 Views
15 Pages

Saliva Influence on the Mechanical Properties of Advanced CAD/CAM Composites for Indirect Dental Restorations

  • Teresa Palacios,
  • Sandra Tarancón,
  • Cristian Abad and
  • José Ygnacio Pastor

6 March 2021

This study aims to evaluate the microstructural and mechanical properties of three commercial resin-based materials available for computer-aid design and manufacturing (CAD/CAM)-processed indirect dental restoration: LavaTM Ultimate Restorative (LU),...

  • Article
  • Open Access
10 Citations
4,511 Views
14 Pages

Design of New Polyacrylate Microcapsules to Modify the Water-Soluble Active Substances Release

  • Valentina Sabatini,
  • Laura Pellicano,
  • Hermes Farina,
  • Eleonora Pargoletti,
  • Luisa Annunziata,
  • Marco A. Ortenzi,
  • Alessandro Stori and
  • Giuseppe Cappelletti

6 March 2021

Despite the poor photochemical stability of capsules walls, polyacrylate is one of the most successful polymers for microencapsulation. To improve polyacrylate performance, the combined use of different acrylate-based polymers could be exploited. Her...

  • Article
  • Open Access
65 Citations
6,340 Views
14 Pages

Polyamide 12 Materials Study of Morpho-Structural Changes during Laser Sintering of 3D Printing

  • Gražyna Simha Martynková,
  • Aleš Slíva,
  • Gabriela Kratošová,
  • Karla Čech Barabaszová,
  • Soňa Študentová,
  • Jan Klusák,
  • Silvie Brožová,
  • Tomáš Dokoupil and
  • Sylva Holešová

6 March 2021

The polyamide (PA)-12 material used for additive manufacturing was studied in aspects of morphology and their structural properties for basic stages received during 3D laser printing. Samples were real, big-scale production powders. The structure of...

  • Article
  • Open Access
10 Citations
4,502 Views
16 Pages

Phase Equilibria and Interdiffusion in Bimodal High-Density Polyethylene (HDPE) and Linear Low-Density Polyethylene (LLDPE) Based Compositions

  • Ildar I. Salakhov,
  • Anatoly E. Chalykh,
  • Nadim M. Shaidullin,
  • Alexey V. Shapagin,
  • Nikita Yu. Budylin,
  • Ramil R. Khasbiullin,
  • Ilya E. Nifant’ev and
  • Vladimir K. Gerasimov

6 March 2021

The compositions based on bimodal high-density polyethylene (HDPE, copolymer of ethylene with hexene-1) and in mixture with monomodal tercopolymer of ethylene with butene-1/hexene-1 (LLDPE, low-density polyethylene) have been studied. Phase equilibri...

  • Article
  • Open Access
14 Citations
3,138 Views
16 Pages

6 March 2021

Abstract We use a quartz crystal microbalance with dissipation (QCM-D) to investigate the swelling/de-swelling and hysteresis in brushes of weakly ionizable polyanion poly(acrylic acid) (PAA) brushes and bilayers containing a PAA brush and a poly(eth...

  • Review
  • Open Access
64 Citations
8,468 Views
18 Pages

Recent Advances in Natural Functional Biopolymers and Their Applications of Electronic Skins and Flexible Strain Sensors

  • Ziying Wang,
  • Zongtao Ma,
  • Jingyao Sun,
  • Yuhua Yan,
  • Miaomiao Bu,
  • Yanming Huo,
  • Yun-Fei Li and
  • Ning Hu

6 March 2021

In order to replace nonrenewable resources and decrease electronic waste disposal, there is a rapidly rising demand for the utilization of reproducible and degradable biopolymers in flexible electronics. Natural biopolymers have many remarkable chara...

  • Article
  • Open Access
27 Citations
4,875 Views
15 Pages

Effect of Plasmid DNA Size on Chitosan or Polyethyleneimine Polyplexes Formulation

  • J.F.A. Valente,
  • P. Pereira,
  • A. Sousa,
  • J.A. Queiroz and
  • F. Sousa

5 March 2021

Gene therapy could be simply defined as a strategy for the introduction of a functional copy of desired genes in patients, to correct some specific mutation and potentially treat the respective disorder. However, this straightforward definition hides...

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Polymers - ISSN 2073-4360