Polymer Journal

http://www.nature.com/pj

List of Papers (Total 3,276)

Novel conducting polymeric nanocomposites embedded with nanoclay: synthesis, photoluminescence, and corrosion protection performance

In this work, new nanoclay composites were prepared through in situ polymerization for reported conducting polyarylidenes based on cyclopentanone and cyclohexanone moieties in the main chain. Additionally, a novel conducting polymer (CP), based on cycloheptanone, was synthesized along with its nanoclays. The studied materials were characterized via Fourier transform infrared...

Structure−property relationships of polypropylene-based nanocomposites obtained by dispersing mesoporous silica into hydroxyl-functionalized polypropylene. Part 2: Matrix−filler interactions and pore filling of mesoporous silica characterized by evolved gas analysis

Nanocomposites containing mesoporous silica (MPS) materials with various pore structures (SBA-15 and MCM-41 types) melt mixed into polypropylene (PP) or PP functionalized with hydroxyl groups (PPOH) were characterized by analytical pyrolysis techniques, such as evolved gas analysis (EGA)-mass spectrometry (MS) and heart-cut EGA-gas chromatography (GC)/MS, to evaluate the...

Structure-property relationships of polypropylene-based nanocomposites obtained by dispersing mesoporous silica into hydroxyl-functionalized polypropylene. Part 1: toughness, stiffness and transparency

The long-range objective of this study is to provide better understanding of the relationship between the structures and properties of PP-based nanocomposites containing mesoporous silica (MPS). In this investigation, nanocomposites composed of MPSs with various porosity structures (two types of Santa Barbara Amorphous No. 15 (SBA-15) with pores of 4.4 or 8.0 nm, and Mobile...

Low-bandgap semiconducting polymers based on sulfur-containing phenacene-type molecules for transistor and solar cell applications

The incorporation of a highly extended π-electron system into a polymer backbone is an effective strategy to develop high-performance donor–acceptor (D–A) polymers suitable for organic electronics because this strategy can facilitate a dense π-π stacking structure, leading to efficient carrier transport. With this in mind, we developed phenanthro[1,2-b:8,7-b′]dithiophene (PDT...

Responsibility of lipid compositions for the amyloid ß assembly induced by ganglioside nanoclusters in mouse synaptosomal membranes

The assembly of amyloid ß protein (Aß) on ganglioside-enriched microdomains in presynaptic neuronal membranes is involved in the onset of Alzheimer’s disease. We previously found that a highly enriched ganglioside domain generated in a reconstituted lipid bilayer composed of synaptosomal lipids functioned as an Aß-sensitive ganglioside nanocluster (ASIGN) that may induce a...

Antimicrobial cationic polymers: from structural design to functional control

Antimicrobial cationic polymers mainly contain two functional components: the cationic groups and the hydrophobic groups. The antimicrobial activity is influenced by the type, amount, location and distribution of these two components. This review summarizes the designs and syntheses of antimicrobial cationic polymers by controlling the above two factors. It involves the...

Polymers for carrying and storing hydrogen

Safe and efficient hydrogen-carrying and -storing materials are in high demand for future hydrogen-based energy systems. Series of hydrogen carriers have been studied and examined, such as organic hydrides, metal hydrides and metal-organic frameworks; however, these carriers often suffer from safety issues and usually fix and store hydrogen at energy-consuming high pressures and...

Improvement of short circuit current density by intermolecular interaction between polymer backbones for polymer solar cells

Benzodithiophene- and quinoxaline (Qu)-based derivatives were used to obtain two kinds of D-π-A-type polymers, poly(diethylhexyloxy benzo dithiophene-dioctyloxy dithiophene diphenyl Qu) (PBDTAQ) and poly(diethylhexyloxy benzo dithiophene-dioctyloxy dithiophene dibenzophenazine (PBDTAFQ), through a Stille coupling reaction. Phenyl (Qu) and fused-phenyl (phenazine, Pz) were...

Liquid crystals in photovoltaics: a new generation of organic photovoltaics

This article presents an overview of the developments in the field of organic photovoltaics (PVs) with liquid crystals (LCs). A brief introduction to the PV and LC fields is given first, followed by application of various LCs in organic PVs. Details of LCs used in bilayer solar cells, bulk heterojunction solar cells and dye-sensitized solar cells have been given. All the liquid...

Effect of surface treatment on molecular reorientation of polymer-stabilized liquid crystals doped with oligothiophene

Irradiation of dye-doped liquid crystals (LCs) with linearly polarized light leads to molecular reorientation, which manifests functional properties for various nonlinear optical (NLO) applications. Material designs with lower light intensity thresholds for molecular reorientation have been explored, and nematic LCs have been one of the most attractive choices because of the high...

Supramolecular polymerization of hydrogen-bonded rosettes with anthracene chromophores: regioisomeric effect on nanostructures

Two regioisomeric barbituric acid compounds possessing (phenylethynyl) anthracene cores and tridodecyloxy phenyl units were synthesized. UV–Vis spectroscopic studies showed that the two compounds self-assemble by a cooperative mechanism in methylcyclohexane (MCH) with different stacking arrangements of the π-conjugated core, which leads to distinct aggregation-induced color...

Revealing mechanical and structural properties of molecules on surface by high-resolution atomic force microscopy

The state-of-the-art atomic force microscopy allows us to observe inner structures of single molecules. Such observation is quite beneficial to study single and self-assembled molecules on surface as well as on-surface chemical reaction. This focus review describes recent technical improvement and achievements in the field of atomic force microscopy.

Effects of branching position of alkyl side chains on ordering structure and charge transport property in thienothiophenedione- and quinacridone-based semiconducting polymers

To investigate the effect of the branching position of the alkyl groups on the side chain of semiconducting polymers, we synthesized two series of semiconducting polymers based on thienothiophene-2,5-dione (PTTD4Ts) and quinacridone (PQA2Ts). 2-Decyltetradecyl, 3-decylpentadecyl, 4-decylhexadecyl, and 5-decylheptadecyl groups were used, and the branching position was...

Development of donor–acceptor copolymers based on dioxocycloalkene-annelated thiophenes as acceptor units for organic photovoltaic materials

Organic photovoltaics (OPVs) have attracted considerable attention over the past two decades not only because of their potential for generating renewable energy but also because of their favorable properties, such as low cost, low weight, solution processability and large-area manufacturability. The active layer of OPVs is based on the concept of the bulk-heterojunction...

Integration of electro-active π-conjugated units in nanosegregated liquid-crystalline phases

Unlike conventional liquid crystals bearing alkyl chains, perylene tetracarboxylic bisimide (PTCBI) derivatives bearing oligosiloxane moieties were synthesized. The oligosiloxane moieties are bulky and have a tendency to form a liquid-like conformation due to the low rotation potential of Si–O bonds. The PTCBI derivatives bearing oligosiloxane chains exhibit the columnar phase at...

Inhibition of solution-processed 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile crystallization by mixing additives for hole injection layers in organic light-emitting devices

We report the inhibition of solution-processed 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) crystallization by mixing additives for the hole injection layers (HILs) in organic light-emitting devices (OLEDs). Various additives were mixed with the HAT-CN layer, including acrylates, compounds resembling HAT-CN and arylamine derivatives. Among these, the HAT-CN films...

Double acceptor donor–acceptor alternating conjugated polymers containing cyclopentadithiophene, benzothiadiazole and thienopyrroledione: toward subtractive color organic photovoltaics

Double acceptor copolymers comprising benzothiadiazole (BT), thieno[3,4-c]pyrrole-4,6-dione (TPD) and two cyclopentadithiophene (CPDT) units, and a series of copolymers comprising CPDT-A-CPDT (A: acceptor=BT or TPD) with different numbers of thiophene units have been synthesized by combinations of Suzuki and Stille coupling, direct arylation and oxidative polymerization...

Structure and design of polymers for durable, stretchable organic electronics

The field of stretchable electronics has recently gained significant interest from the academic community, with a focus on producing materials that demonstrate reliable electrical performance with improved response to mechanical deformation. This review highlights the recent progress in understanding the relationships between the mechanical behavior and electrical performance of...

Molecular design of photorefractive polymers

This review article describes the current state-of-the-art research on organic photorefractive polymer composites. A historical background on photorefractive materials is first introduced and is followed by a discussion on the opto-physical aspects and the mechanism of photorefractivity. The molecular design of photorefractive polymers and organic compounds is discussed, followed...

Preparation of nanogel-immobilized porous gel beads for affinity separation of proteins: fusion of nano and micro gel materials

We describe the preparation and evaluation of nanogel-immobilized porous gel beads (GB) for application as a protein purification medium. Nanogel particles (NP) that bind with the Fc fragment of immunoglobulin G (IgG) were immobilized on the pore surface of macroporous hard GB containing quaternary ammonium cations on the surface via multipoint electrostatic interactions. The...

Quantitative evaluation of an epoxy resin dispersion by infrared spectroscopy

A new method for the quantitative analysis of an epoxy resin dispersion by infrared (IR) spectroscopy is described. The absorbance ratio of various peaks in different areas of the IR spectra of a resin mixture, standardized to the IR absorbance of a peak for aromatic ring hydrogens (1593 cm−1), is applied to evaluate the conditions for epoxy resin dispersion. The standard...

A new mechanism for the silica nanoparticle dispersion–agglomeration transition in a poly(methyl methacrylate)/silica hybrid suspension

We examined the agglomeration behavior of a suspension of SiO2 nanoparticles with average dimensions of ∼15 nm in a solution of tetrahydrofuran and polydisperse poly(methyl methacrylate) (PMMA) with a weight-average molecular weight in the range of (0.3–31) × 104. For PMMA with a critical molecular weight (Mc) of ∼3 × 104 or larger, at which PMMA chains show effective...