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Journal Cover Polymer Journal
  [SJR: 0.662]   [H-I: 51]   [0 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0032-3896 - ISSN (Online) 1349-0540
   Published by NPG Homepage  [142 journals]
  • Application of a polarized modulation technique in supramolecular science:
           chiroptical measurements of optically anisotropic systems
    • Application of a polarized modulation technique in supramolecular science: chiroptical measurements of optically anisotropic systems

      Application of a polarized modulation technique in supramolecular science: chiroptical measurements of optically anisotropic systems, Published online: 21 May 2018; doi:10.1038/s41428-018-0066-2

      The true chiroptical measurements of optically anisotropic samples cannot be generally achieved with modern chiroptical spectrophotometers such as circular dichroism and circularly polarized luminescence based on polarization modulation techniques because of the coupling effect of the nonideal optics and the electronics with macroscopic anisotropies. Artifact signals related to the nonchiral phenomena are often much stronger than the chiroptical signals. Universal chiroptical spectrophotometer (UCS) and comprehensive chiroptical spectrophotometer (CCS) integrated into the Stokes–Mueller matrix analysis for optically anisotropic samples can be applicable for accurate chiroptical measurements for samples with macroscopic anisotropies.Application of a polarized modulation technique in supramolecular science: chiroptical measurements of optically anisotropic systems, Published online: 2018-05-21; doi:10.1038/s41428-018-0066-22018-05-21
      DOI: 10.1038/s41428-018-0066-2
       
  • Nucleation effects of high molecular weight polymer additives on low
           molecular weight gels
    • Nucleation effects of high molecular weight polymer additives on low molecular weight gels

      Nucleation effects of high molecular weight polymer additives on low molecular weight gels, Published online: 21 May 2018; doi:10.1038/s41428-018-0076-0

      Polymer chain conformation was utilized to control the nucleation of a cholesterol-pyridine molecular gel. Collapsed chain conformations influence gel structure and dissociation behavior by acting as physical barriers that lead to confinement effects and permanent networks. An extended polymer chain conformation allowed for polymer–molecular-gel interactions and increased dissociation temperatures due to its highly ordered structure, resulting in transient networks. Additionally, the high molecular weight polymer solution behavior guided solution mechanics, where collapsed chains lead to viscous solutions and gels and extended chains led to elastic gel networks.Nucleation effects of high molecular weight polymer additives on low molecular weight gels, Published online: 2018-05-21; doi:10.1038/s41428-018-0076-02018-05-21
      DOI: 10.1038/s41428-018-0076-0
       
  • Photochemical liquefaction and softening in molecular materials, polymers,
           and related compounds
    • Photochemical liquefaction and softening in molecular materials, polymers, and related compounds

      Photochemical liquefaction and softening in molecular materials, polymers, and related compounds, Published online: 21 May 2018; doi:10.1038/s41428-018-0064-4

      This review focuses on the recent developments on the photo-induced liquefaction and softening of azobenzene-based materials. The trans–cis photoisomerization of azobenzene units incorporated in molecular materials, polymers, and gels induces a variety of state changes such as solid–liquid, gel–sol, and glass–rubber transitions of those materials isothermally. Several novel applications such as reusable and environmentally friendly photoresists, reworkable adhesives, and self-healing materials can be expected using the photochemical liquefaction and softening.Photochemical liquefaction and softening in molecular materials, polymers, and related compounds, Published online: 2018-05-21; doi:10.1038/s41428-018-0064-42018-05-21
      DOI: 10.1038/s41428-018-0064-4
       
  • Fracture processes of crystalline polymers using coarse-grained molecular
           dynamics simulations
    • Fracture processes of crystalline polymers using coarse-grained molecular dynamics simulations

      Fracture processes of crystalline polymers using coarse-grained molecular dynamics simulations, Published online: 21 May 2018; doi:10.1038/s41428-018-0067-1

      In this focus review, our recent investigations into the deformation and fracture processes of crystalline polymers using coarse-grained molecular dynamics simulations are described. The lamellar structure of polyethylene, a fundamental structural feature of this polymer, is successfully reproduced. Then, a stress– strain curve that exhibited good consistency with that observed experimentally is obtained. Molecular simulations are a powerful tool for elucidating the mechanisms of the deformation and fracture processes of crystalline polymers at the molecular level and this review will contribute to the development of this field of research.Fracture processes of crystalline polymers using coarse-grained molecular dynamics simulations, Published online: 2018-05-21; doi:10.1038/s41428-018-0067-12018-05-21
      DOI: 10.1038/s41428-018-0067-1
       
  • Development of macromolecules and supramolecules based on silicon and
           arsenic chemistries
    • Development of macromolecules and supramolecules based on silicon and arsenic chemistries

      Development of macromolecules and supramolecules based on silicon and arsenic chemistries, Published online: 21 May 2018; doi:10.1038/s41428-018-0068-0

      In this focus review, our recent progress on hybrid polymers and supramolecules utilizing silicon and arsenic is overviewed. Novel materials design based on polyhedral oligomeric silsesquioxane (POSS) has been realized by focusing on the symmetry. Practical synthetic methods have opened new avenue to experimental studies on organoarsenic compounds.Development of macromolecules and supramolecules based on silicon and arsenic chemistries, Published online: 2018-05-21; doi:10.1038/s41428-018-0068-02018-05-21
      DOI: 10.1038/s41428-018-0068-0
       
  • Conjugation break spacers and flexible linkers as tools to engineer the
           properties of semiconducting polymers
    • Conjugation break spacers and flexible linkers as tools to engineer the properties of semiconducting polymers

      Conjugation break spacers and flexible linkers as tools to engineer the properties of semiconducting polymers, Published online: 18 May 2018; doi:10.1038/s41428-018-0069-z

      The inclusion of electrically insulating aliphatic spacers between π-conjugated segments of semiconducting polymers represents an emerging and versatile tool to control material properties. Here we review this strategy and highlight recent reports demonstrating the control over chain self-assembly, the tunability of viscosity and elasticity, and the ability to provide insights into inter- and intra-charge transport processes—without detrimental effects on the polymer semiconducting ability. While still at an early stage, this approach gives promise towards engineering optoelectronic performance, melt-processed organic electronics, and applications toward stretchable wearable semiconducting devices.Conjugation break spacers and flexible linkers as tools to engineer the properties of semiconducting polymers, Published online: 2018-05-18; doi:10.1038/s41428-018-0069-z2018-05-18
      DOI: 10.1038/s41428-018-0069-z
       
  • Synthesis and properties of hyperbranched polymers by polymerization of an
           AB3-type incompletely condensed cage silsesquioxane (IC-POSS) monomer
    • Synthesis and properties of hyperbranched polymers by polymerization of an AB3-type incompletely condensed cage silsesquioxane (IC-POSS) monomer

      Synthesis and properties of hyperbranched polymers by polymerization of an AB3-type incompletely condensed cage silsesquioxane (IC-POSS) monomer, Published online: 18 May 2018; doi:10.1038/s41428-018-0071-5

      An incompletely condensed cage silsesquioxane (IC-POSS)-based AB3-type monomer, tris(dimethylsilyl)-p-vinylhexaisobutyl-IC-POSS (3), was prepared by the corner-cleaved reaction of vinylheptaisobutyl-POSS (1) and subsequent capping reaction with chlorodimethylsilane. The hydrosilylation polymerization of 3 in the presence of Karstedt’s catalyst in toluene provided a soluble polymer. The refractive index of the unmodified polymer film was 1.4376. Post functionalization with isoprenol increased the dispersibility in polar organic solvents and significantly increased the glass-transition temperature. Post functionalization with allylheptaisobutyl-POSS significantly increased the thermal stability. Their refractive index varied from 1.4464 to 1.4573 upon post functionalization.Synthesis and properties of hyperbranched polymers by polymerization of an AB3-type incompletely condensed cage silsesquioxane (IC-POSS) monomer, Published online: 2018-05-18; doi:10.1038/s41428-018-0071-52018-05-18
      DOI: 10.1038/s41428-018-0071-5
       
  • Open-shell organic semiconductors: an emerging class of materials with
           novel properties
    • Open-shell organic semiconductors: an emerging class of materials with novel properties

      Open-shell organic semiconductors: an emerging class of materials with novel properties, Published online: 18 May 2018; doi:10.1038/s41428-018-0070-6

      Open-shell organic semiconductors are poised to enable new functions and applications ranging from electronics and optoelectronics to magneto-electronics. Here, we review strategies toward molecular magnets or spin–polarized magnetic organic semiconductors that encompasses incorporation of stable radical groups directly into the backbone of organic semiconductors or preparation of highly conjugated ladder-type molecules based on open–shell Kekulé–type structures to enable efficient spin delocalization/spin-transfer along the conjugation length. We briefly survey the history of this field, summarize recent developments, and set an outlook for the future.Open-shell organic semiconductors: an emerging class of materials with novel properties, Published online: 2018-05-18; doi:10.1038/s41428-018-0070-62018-05-18
      DOI: 10.1038/s41428-018-0070-6
       
 
 
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