Materials Literature
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Abstract Solid‐state shearing was applied on recycled poly(ethylene terephtalate) (PET) using twin‐screw extruder. The shearing effect on isothermal crystallization was investigated by DSC. Structure formation in melt spinning was also studied by characterizing the spun fibers. It was found that the solid‐state sheari…
Abstract The reaction of ozone with 1,4‐ cis ‐polybutadiene and polybutadiene having the following linking of the butadiene units: 1,4‐cis (47%), 1,4‐trans (42%), 1,2 (11%) was investigated in CCl 4 solution. It was found out by means of IR‐spectroscopy and 1 H‐NMR spectroscopy that the basic ozonolysis products of bo…
Abstract Blends of high‐density polyethylene (HDPE) and a reactive ethylene terpolymer (RET) were developed as a protective coating material for steel. A morphological study with scanning electron microscopy (SEM) indicated that blends of HDPE and RET are immiscible, while high interaction between these two phases was…
Abstract Morphology development during the coalescence under shear in polypropylene/polystyrene blends was studied in this article. The coalescence was performed by decreasing the shear rate after a fine morphology is obtained at higher shear rate. Time resolved SEM performance indicates that, because of the smaller c…
Abstract Poly(butyl acrylate–methyl methacrylate) [P(BA–MMA]/polyaniline (PANI) core–shell complex particles were synthesized with a two‐step emulsion polymerization method with P(BA–MMA) as the core and PANI as the shell. The first step was to prepare P(BA–MMA) latex particles as the core via soapless emulsion polyme…
Abstract Polyaniline (PANI) films were deposited on titanium (Ti) electrode in a bath containing 0.3 mol L −1 aniline and 1 mol L −1 HNO 3 by pulse potentiostatic method (PPM) and potentiostatic method (PM). The chronoamperograms during aniline polymerization were recorded, and the morphologies of PANI films prepared…
Anodic decomposition of a vinylmagnesium halide or an ethynylmagnesium halide at a surface-hydrogenated silicon electrode leads to the formation of polymeric layers covalently anchored to the silicon surface. These layers have been characterized using spectroellipsometry and photoluminescence, infrared, and X-ray phot…
Abstract Triazine‐based hyperbranched polyether was obtained by earlier reported method and blended with low density polyethylene (LDPE) and plasticized poly(vinyl chloride) (PVC) separately to improve some desirable properties of those linear polymers. The properties like processability, mechanical properties, flamma…
The static longitudinal linear polarizability (alpha) and second order hyperpolarizability (gamma) for neutral and charged, closed- and open-shell trans-polyacetylene (PA) chains C(2n)H(2n+2), C(2n-1)H(2n+1), C(2n-1)H(2n+1) (+), C(2n)H(2n+2) (+), and C(2n)H(2n+2) (2+) are systematically investigated and compared. The…
Abstract Biodegradable polyester blends were prepared from poly( L ‐lactic acid) (PLLA) and poly(ε‐caprolactone) (PCL) (50/50) by melt‐blending, and the effects of processing conditions (shear rate, time, and strain) of melt‐blending on proteinase‐K‐ and lipase‐catalyzed enzymatic degradability were investigated using…
Abstract Starch‐based plastic films were prepared by the electron beam irradiation of starch and poly(vinyl alcohol) (PVA) in a physical gel state at room temperature. The influence of starch/PVA composition, irradiation dose, and plasticizer (glycerol) on the properties of the plastic films was investigated. The gel…
In this paper, we discuss various edge effects on the outflow behaviors of water around the edge to solve the troublesome problem that frequently brings about great inconvenience in daily lives. A simple method of pressing a drop over the edges of a conical frustum was adopted here to explore the stability of a suspen…
A dual-fluorescent donor-acceptor (D-A) dyad with tercarbazole (donor) and 2,3-dithienylmaleimide (acceptor) was synthesized and characterized. The emission intensity of long wavelength could be regulated by either bistable structures of the dyad or the polarities of solvents. By mimicking the function of an integrate…
The existence of a family of stable I h -symmetric polysilane nanostructures is predicted. The smallest member of the family is the dodecahedral Si 20 H 20 cage, followed by Si 80 H 80, Si 180 H 180, and larger structures. The structures and stabilities of the polysilane nanostructures were determined on the basis of…
In this Letter, we report the confinement of a uniform beam of light (lambda(1) = 400 nm) at the nodes of a standing wave (lambda(2) = 532 nm) via absorbance modulation. In the present implementation of absorbance modulation, a thin polymer film containing a photochromic azobenzene side chain is exposed to a standing…
Abstract Poly(vinyl phenol)‐ block ‐polystyrene (PVPh‐ b ‐PS) diblock copolymers are synthesized by sequential anionic polymerization with sec ‐butyl lithium as the initiator. The PVPh‐ b ‐PS diblock copolymer is cast (on a substrate) from several solvent mixtures that contain tetrahydrofuran/toluene ratios of 1:0.1,…
Abstract A series of X‐ray pole figures were obtained from oriented and unoriented rigid polyvinyl chloride sheets. From these, information about crystallite orientation in uniaxially and biaxially drawn sheets stretched at 90°C was obtained. Uniaxial orientation produced two crystallite orientations with the extent o…
Abstract Surfactant‐free poly(acrylonitrile‐ co ‐styrene)/silica (AS/SiO 2 ) nanocomposite particles was synthesized in the presence of cheap, commercially amorphous aqueous silica sol at ambient temperature. Thermogravimetric analysis (TGA) indicated silica contents ranging from 5 wt % to 29 wt %, depending on reacti…
Abstract The compatibilization of HDPE/LDPE/LLDPE/PET blend during reactive extrusion, using compatibilizing agents, such as modified high, low, and lineal low density polyethylenes with maleic anhydride, was carried out. The agents were prepared in our laboratory by using a UV preirradiation process, containing diffe…
Phase transformation temperature is one of the most important parameters for the shape memory alloys (SMAs). The most popular method to determine these phase transformation temperatures is the Differential Scanning Calorimeter (DSC), but due to the limitation of the DSC testing itself, it made it difficult for the fin…