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Polymers, Volume 10, Issue 3

March 2018 - 116 articles

Cover Story: A key step in the manufacture of bioresorbable vascular scaffolds (BVSs) for treatment of coronary heart disease is "stretch blow molding", which expands a nearly amorphous poly L-lactide (PLLA)-extruded tube from an outer diameter (OD) of 1.5 mm to an OD of 3.6 mm with a final wall thickness of ~150 µm. A new instrument probes the rate and morphology of PLLA crystallization during (center pattern, 45% OD-strain, t=70 s) and after (lower right, 350 s; after elongation ceases at 150% OD-strain, 100 s) azimuthal elongation using in situ X-ray scattering. Control of crystallinity may enable thinner scaffolds (~80 µm instead of ~150 µm) to facilitate implantation and improve outcomes. View the paper
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Articles (116)

  • Article
  • Open Access
38 Citations
7,418 Views
25 Pages

Optimization of Mechanical Properties for Polyoxymethylene/Glass Fiber/Polytetrafluoroethylene Composites Using Response Surface Methodology

  • Jasbir Singh Kunnan Singh,
  • Yern Chee Ching,
  • Luqman Chuah Abdullah,
  • Kuan Yong Ching,
  • Shaifulazuar Razali and
  • Seng Neon Gan

20 March 2018

This paper investigated the effects of polytetrafluoroethylene (PTFE) micro-particles on mechanical properties of polyoxymethylene (POM) composites. Since PTFE is immiscible with most polymers, the surface was etched using sodium naphthalene salt in...

  • Article
  • Open Access
18 Citations
7,869 Views
17 Pages

20 March 2018

Poly(vinylidene fluoride) (PVDF) based ferroelectric polymers have attracted considerable attention both academically and industrially due to their tunable ferroelectric properties. By pinning the conformation of the polymer chain and the ferroelectr...

  • Article
  • Open Access
20 Citations
5,346 Views
18 Pages

20 March 2018

An epoxy-thiol system filled with boron nitride (BN), in the form of 80 µm agglomerates, has been investigated with a view to achieving enhanced thermal conductivity. The effect of BN content on the cure reaction kinetics has been studied by differen...

  • Article
  • Open Access
14 Citations
5,213 Views
14 Pages

20 March 2018

A novel composite composed of lignocellulose (LC), glutaraldehyde crosslinked chitosan (GC) and multiwalled carbon nanotube (MWCNT) was fabricated by the hot-pressing process. The effect of the additional GC and MWCNT on the mechanical strength, dime...

  • Review
  • Open Access
158 Citations
15,367 Views
33 Pages

Chitosan Derivatives: Introducing New Functionalities with a Controlled Molecular Architecture for Innovative Materials

  • Waldo M. Argüelles-Monal,
  • Jaime Lizardi-Mendoza,
  • Daniel Fernández-Quiroz,
  • Maricarmen T. Recillas-Mota and
  • Marcelino Montiel-Herrera

20 March 2018

The functionalization of polymeric substances is of great interest for the development of innovative materials for advanced applications. For many decades, the functionalization of chitosan has been a convenient way to improve its properties with the...

  • Article
  • Open Access
25 Citations
8,390 Views
14 Pages

19 March 2018

Tubuliform silk is one of the seven different types of spider silks, which is well known for its unique tensile behaviour with Flat Tensile Stress–Strain (FTSS) curve. It is found that anisotropic microstructure of β-sheets is responsible for this pr...

  • Article
  • Open Access
24 Citations
4,048 Views
26 Pages

Numerical Investigation of Masonry Strengthened with Composites

  • Giancarlo Ramaglia,
  • Gian Piero Lignola,
  • Francesco Fabbrocino and
  • Andrea Prota

19 March 2018

In this work, two main fiber strengthening systems typically applied in masonry structures have been investigated: composites made of basalt and hemp fibers, coupled with inorganic matrix. Starting from the experimental results on composites, the out...

  • Article
  • Open Access
14 Citations
6,681 Views
13 Pages

19 March 2018

Hydrogel microcapsules are improved transplantation delivery vehicles for pharmaceuticals by effectively segregating the active ingredients from the surroundings and delivering them to a certain target site. Layer-by-layer (LbL) assembly is an attrac...

  • Article
  • Open Access
9 Citations
5,617 Views
18 Pages

Cargo Release from Polymeric Vesicles under Shear

  • Yingying Guo,
  • Luca Di Mare,
  • Robert K. Y. Li and
  • Janet S. S. Wong

19 March 2018

In this paper we study the release of cargo from polymeric nano-carriers under shear. Vesicles formed by two star block polymers— A 12 B 6 C 2 ( A B C ) and A 12 B 6 A 2 ( A B A )—and one linear block copoly...

  • Article
  • Open Access
5 Citations
8,063 Views
14 Pages

19 March 2018

Three different polyfunctional acrylate monomers—trimethylolpropantriacrylate (TMPTA), pentaerythritol triacrylate (PETA) and di(trimethylolpropane) tetraacrylate (DTTA)—have been used as comonomers in combination with a reactive resin consisting of...

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Polymers - ISSN 2073-4360