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Showing 1 to 20 of 21 for “"Matrix polymer"”.
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INFLUENCE OF MOLECULAR STRUCTURES ON THE PROPERTIES OF COMPLEMENTARY SEMICONDUCTING POLYMER BLENDS
Semiconducting polymers are considered as the materials for the next generation large-area and flexible electronics. In the past several decades, extensive effort has been to understand and improve the charge transport properties of semiconducting polymers. Chapter one is an introduction to organic …
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Coupling of the electrical, mechanical and optical response in polymer/liquid-crystal composites
… liquid-crystal (LC) droplets embedded in a polymer matrix may enable optical switching in the composite film through the alignment of the LC director along an external electric field. When a ferroelectric material is used as host polymer, the electric field generated by the piezoelectric …
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Hyperbranched Aromatic Polyesters and Their Application in Blends of Linear Polyamides
In the last two decades, hyperbranched (hb) polymers have drawn much attention and obtained intensive research activities both from industry and academia. They are known to have unique and interesting properties which derive from their three dimensional structure and the large number of functional …
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Synthesis and Characterization of Multiphase Block Copolymers: Influence of Functional Groups on Macromolecular Architecture
… anionic telomerization and conventional anionic polymerization. Maintaining the initiation and reaction temperature less than 70 °C minimized chain transfer and enabled the telomerization to occur in a living fashion, which resulted in well-controlled molecular weights and narrow polydispersity …
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The blending and permeability of polymers for packaging applications
… grafted on PP, MA and butyl methacrylate(BMA) co-polymer grafted on PP, and BMA grafted on low density polyethylene. The effect of two silanes( methacrylate functional and vinyl functional) on PP were also investigated and also the plasticization of PA6 with formic acid. The results were compared …
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Understanding the Effect of Sizing and Cellulose Nanocrystals on S2 Glass Fiber Sheet Molding Compounds
Glass Fiber Reinforced Polymers (GFRPs) are increasingly more ubiquitous as research continuously pushes the limits of their mechanical performance. Excellent mechanical properties and low density coupled with increased ease of processibility are what distinguishes GFRPs over metallic materials. …
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Polymer Composite Dielectric Materials For Pulse Power Applications
… issue for delivering intense pulsed power. Polymer composites, incorporating the high energy storage capability of fillers and graceful failure mechanisms of matrix polymers, offer a solution for the acute need for high voltage, high rate pulse power. </p> <p> In the first part of this …
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Synthesis and Blend Behaviour of Multi-End Capped Polyethylene
There is an ever-growing need for polymers with specific surface properties for the production of modified materials. Recently, extremely efficient polymer surface modification has been achieved by incorporating dendritically end functionalised polymers into blends, which combine sufficient …
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Generation of Thermotropic Liquid Crystalline Polymer (TLCP)-Thermoplastic Composite Filaments and Their Processing in Fused Filament Fabrication (FFF)
… used to improve the physical properties of polymeric matrices. However, the blending methods lead to fiber breakage, preventing generation of long fiber reinforced filaments essential for printing load-bearing components. Our approach to improve tensile properties of the printed parts was to …
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Altering the fiber-matrix interphase in semicrystalline polymer matrix composites
When many semicrystalline polymers are used as matrix materials in composites, a morphology known as the transcrystalline region is formed on the surface of the reinforcing material. This region introduces a new crystalline structure to the system that is different from that of the bulk matrix …
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A numerical and experimental investigation of the effects of thermal history on the structure/property relationship of PPS/carbon fiber composites
… on the degree of crystallinity developed in the matrix polymer was determined using differential scanning calorimetry. The effect of thermal history on and the resulting matrix morphology was examined by scanning electron microscopy. The subsequent effects of the degree of crystallinity and the …
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Hybrids Based on Layered Silicates
… silicates as inorganic core and well-defined polymer chains as a shell. In all cases positively charged 2-(dimethylamino)ethyl methacrylate (DMAEMA) was incorporated into the polymeric structure to serve as a firm anchor onto the negatively charged clay surface via electrostatic adsorption. …
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Generation of Recyclable Liquid Crystalline Polymer Reinforced Composites for Use in Conventional and Additive Manufacturing Processes
… recyclability. Thermotropic liquid crystalline polymers (TLCPs) are high-performance engineering thermoplastics, which have comparable mechanical performance to that of glass fiber. The TLCP reinforced composites, called in situ composites, can form the reinforcing TLCP fibrils during processing …
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Identification of new therapeutic compounds against carbapenemase-producing Klebsiella pneumoniae using a novel agar-based high-throughput microarray compound screening approach
… the cellulose nanofiber (CNF) immobilization matrix, polymer component of the printing solution, inoculum, agar thickness, and agar concentration. The optimized parameters for effectively running the high-throughput antibacterial screen were set at 1.5% (w/v) CNF immobilization matrix into …
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Räumlich definierte Homo- und Blockcopolymer Nanokomposite
… since 20 years. The addition of additives to polymers can manipulate their properties, they can be optimized and intensified even at low volumes. In addition completly new properties can be introduced. When nanocrystals are used as additives the system is reffered to as polymer nanocomposite. …
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Protein-Intercalated Bentonite for Bio-composites
… clays including bentonite are typically used in polymers to enhance composite properties at a very low level of loading. As bio-composite fillers, bentonite is modified with organics such as alkylammonium, amines and gelatin to improve compatibility with the matrix polymer. The use of these …
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The in situ generation of liquid crystalline polymer reinforcements in thermoplastics
… by blending with liquid crystalline polymers (LCPs). Injection molding and sheet extrusion studies of blends of poly(ethylene terephthalate) (PET) with several LCPs were conducted with an emphasis on blends containing 50 wt % or less of the LCP. It was seen that significant …
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Polymer/Clay Nanocomposites as Barrier Materials Used for VOC Removal
… of a silicate layered nanoclay into a polymer matrix can affect the barrier properties of the pristine polymer in order to decrease the transport of volatile organic compounds (VOC) in indoor air. Building materials are a primary source for VOCs. These emissions are a probable cause of …
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An investigation of the effects of shearfree deformation and the role of miscibility on the structure and properties of in situ thermoplastic composites
… morphology of thermotropic liquid crystalline polymer blends were investigated in this part of the work. Blends of an immiscible (Vectra A900) and partially miscible (HX1000) thermotropic liquid crystalline polymer (TLCP) with a polyetherimide (PEI) were used in the investigations. The blends …
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Coaxial Electrospinning of Synthetic/Natural Polymer Combinations for Controlled Release of Active Components in Biomedical Applications
… advance coaxial electrospinning techniques for polymer/protein systems, targeting tissue engineering and drug delivery applications. While electrospinning is increasingly utilised in tissue engineering, challenges arise when incorporating active pharmaceutical ingredients due to solubility and …
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