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Polymers, Volume 10, Issue 4

April 2018 - 121 articles

Cover Story: Chitin deacetylases (CDAs) catalyze the hydrolysis of acetamido groups in GlcNAc residues of chitin, chitosan, and chitooligosaccharides (COS). The deacetylation specificity exhibited by CDAs is diverse, some enzymes being specific for single positions, others showing multiple attacks, processivity or random actions. The “subsite capping model” proposes that specificity is partly governed by a series of dynamic loops that shape the substrate binding cleft, which differ among CDAs on a highly conserved protein core. The structures, specificities, and biotech applications of bacterial and fungal CDAs are reviewed here. View the paper here.
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Articles (121)

  • Article
  • Open Access
3 Citations
4,415 Views
14 Pages

A Study of the Polycondensation of (Tetrahydroxy)(Tetraaryl)Cyclotetrasiloxanes under Equilibrium and Non-Equilibrium Conditions in the Presence and Absence of Montmorillonite

  • Nataliya N. Makarova,
  • Yury I. Lyakhovetsky,
  • Irina M. Petrova,
  • Fedor M. Dolgushin,
  • Nikolai S. Ikonnikov,
  • Alexander S. Peregudov,
  • Tatyana V. Strelkova and
  • Zinaida S. Klemenkova

9 April 2018

Oligo- and polycyclosiloxanes were obtained by the polycondensation of (tetrahydroxy)(tetraaryl)cyclotetrasiloxanes in equilibrium and non-equilibrium conditions in the presence and absence of montmorillonite (MMT). Their composition and the structur...

  • Article
  • Open Access
318 Citations
27,227 Views
18 Pages

8 April 2018

As starch is an inexpensive, filmogenic, easily processable and a widely available material, it is a material that can be utilized in the creation of biodegradable films and containers, presenting as a viable alternative to polymers derived from petr...

  • Article
  • Open Access
20 Citations
8,162 Views
14 Pages

Low-Dissipation Thermosets Derived from Oligo(2,6-Dimethyl Phenylene Oxide)-Containing Benzoxazines

  • Chien-Han Chen,
  • Kuan-Wei Lee,
  • Ching-Hsuan Lin and
  • Tzong-Yuan Juang

7 April 2018

Poly(2,6-dimethyl phenyl oxide) (PPO) is known for its low dissipation factor. To achieve insulating materials with low dissipation factors for high-frequency communication applications, a telechelic oligomer-type benzoxazine (P-APPO) and a main-chai...

  • Article
  • Open Access
8 Citations
7,588 Views
12 Pages

6 April 2018

We report an efficient synthesis route for the formation of gold/silver-core–PE-shell nanohybrids in a simple self-assembly approach using PE with strong aurophilicity and argentophilicity, via thiol- and trithiocarbonate terminated moieties. This un...

  • Article
  • Open Access
10 Citations
10,208 Views
16 Pages

Active Ester Containing Surfmer for One-Stage Polymer Nanoparticle Surface Functionalization in Mini-Emulsion Polymerization

  • Vanessa L. Albernaz,
  • Monika Bach,
  • Achim Weber,
  • Alexander Southan and
  • Günter E. M. Tovar

6 April 2018

Functional surface active monomers (surfmers) are molecules that combine the functionalities of surface activity, polymerizability, and reactive groups. This study presents an improved pathway for the synthesis of the active ester containing surfmer...

  • Article
  • Open Access
15 Citations
4,729 Views
12 Pages

6 April 2018

In this study, methyltrimethoxysilane (MTMOS) was used as a reagent to prepare SiO2-based wood-inorganic composites (WICSiO2) via the sol-gel process, and subsequently, the extended creep behaviors of WICSiO2 with weight percent gains (WPGs) of 10%,...

  • Review
  • Open Access
6 Citations
5,976 Views
16 Pages

6 April 2018

Endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD) have been used for surgical treatment of early gastric cancer. These endoscopic techniques require proper submucosal injections beneath the tumor to provide a sufficiently...

  • Article
  • Open Access
27 Citations
5,821 Views
14 Pages

Crystalline Modification and Its Effects on Dielectric Breakdown Strength and Space Charge Behavior in Isotactic Polypropylene

  • Ling Zhang,
  • Yunxiao Zhang,
  • Yuanxiang Zhou,
  • Chenyuan Teng,
  • Zhaowei Peng and
  • Stephen Spinella

5 April 2018

Adding nucleating agents (NAs) is one of the most efficient ways to obtain improved mechanical, optical, and thermal properties of isotactic polypropylene (iPP). While it is well appreciated that electrical property is critically affected by crystall...

  • Article
  • Open Access
23 Citations
6,726 Views
18 Pages

4 April 2018

The present work is a novel attempt to understand the microstructure of styrene-ethylene-butylene-styrene (SEBS)/polystyrene (PS) blends not only through morphological studies, but also thermal, mechanical and rheological characterizations. SEBS/PS b...

  • Article
  • Open Access
69 Citations
5,669 Views
14 Pages

4 April 2018

In this study, polylactide acid (PLA) is filled with bamboo fibers (BFs) to fabricate a biodegradable natural composite for industrial applications. The influence of pre-treatment of BFs using 4 wt % sodium hydroxide (NaOH) solution at room temperatu...

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Polymers - ISSN 2073-4360