Materials Literature
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Abstract A new kind of organophilic clay, cotreated by methyl tallow bis‐2‐hydroxyethyl quaternary ammonium and epoxy resin into sodium montmorillonite (to form a strong interaction with polyamide 66 matrix), was prepared and used in preparing PA66/clay nanocomposites (PA66CN) via melt‐compounding method. Three differ…
Abstract As an amphoteric polyelectrolyte, gelatin could intercalate into the galleries of montmorillonite (MMT). In this paper, sodium laurate/MMT composites and sodium laurate/dehydroxylated MMT composites were introduced as low molecular simulation to investigate the interaction functional groups of gelatin and MMT…
Octopolar tris[(phenyl)ethynyl]benzenes with high second-order nonlinear optical (NLO) activity form discotic liquid-crystalline mesophases whose properties depend on the length of the alkoxy chains. The molecules self-organize in a non-centrosymmetric fashion in the bulk phase which enables the construction of a simp…
Large-scale molecular-dynamics simulations are performed to study the steady-state yielding dynamics of a well-established simple glass. In contrast to the supercooled state, where the shear stress, $\ensuremath{\sigma}$, tends to zero at vanishing shear rate, $\stackrel{\ifmmode \dot{}\else \.{}\fi{}}{\ensuremath{\ga…
Abstract Anionic ring‐opening polymerization of lactams leads to the formation of poly(lactams) or polyamides. This work aimed at comparing the performance of four methods for measuring the conversion of ε‐caprolactam (CL) to polyamide 6. The latter was either a homopolymer (PA6) or grafts onto polystyrene (PS‐ g ‐PA6…
Abstract Carbon black (HAF) filled powdered natural rubber (P(NR/HAF)) was prepared and the particle size distribution, mechanical properties, and micromorphology of P(NR/HAF) were studied. A carbon black–rubber latex coagulation method was developed for preparing carbon black filled free‐flowing, noncontact staining…
Flow stress behaviour of Mg–Al–Zn alloys was studied by compression testing using a Gleeble 1500 machine at temperatures of 200–450°C and at strain rates ranging from 0·005 to 5 s −1 . The experimental results show that initial grain size and a distinctive basal texture lead to the great difference between as extruded…
Uniform ZnxCd1-xSe nanocrystals have been prepared at the artificially designed water-oil interface using Na2SeO3, Cd(NO3)2, and Zn(NO3)2 as precursors. The chemical composition and band gap of the ZnxCd1-xSe nanocrystals can be adjusted via different combinations of source material. The coating of a SiO2 shell could…
This study presents a fabrication method, bench top test results, and numerical model validation for a novel adaptive jet engine chevron concept based upon embedding shape memory alloy (SMA) actuators in a composite laminate, termed a SMA hybrid composite (SMAHC). The approach for fabricating the adaptive SMAHC chevro…
Abstract Alkoxysilane‐modified high solids hydroxyl acrylic polyurethane was prepared by solution polymerization. Its structure, surface, and thermal properties were investigated by 1 H NMR, device of contact angle, thermo gravimetric analysis (TGA), atomic force microscopy (AFM), and X‐ray photoelectron spectroscopy…
Abstract Lyocell fibers were heat‐treated under different conditions. The tensile strength and initial modulus of the heat‐treated Lyocell fibers increased sharply, whereas the elongation at break decreased. Moreover, applying tension to the fibers during the heat treatment further improved the tensile strength and in…
Abstract A range of polyimides have been subjected to electron beam radiolysis at different temperatures. These polyimides were chemically designed to suit space applications, being either transparent or having groups which provide oxidation resistance. The structural changes that occur in the polyimides, when subject…
This work is mainly an investigation of some of the liquid-to-solid properties of pure benzene on a restricted domain of high pressures (20.6< or =P< or =102.9 MPa). Newly obtained equilibrium experimental data and recently developed analytical equation of state are exploited and compared with each other and with prev…
Abstract A new type of solid state electrodes sensitive to pH changes is described, in which the chemical‐sensitive layer consists of Pt microparticles deposited on a conducting polymer (polyaniline, polypyrrole) blend containing 22.7% w/w zeolite. These sensors are stable in aqueous electrolyte solutions of low pH va…
Abstract The tensile behavior under monotonic loading and stress‐relaxation testing of an epoxy resin has been studied. Experimental data at various strain rates and three temperatures from ambient up to just below T g were performed, to study the transition from the brittle behavior to a ductile and therefore viscopl…
A comparison is made between the vibrational characteristics of the carbonyl and cyanide ligands. There are significant differences; the latter has a smaller dipole moment and a larger quadrupole moment associated with the bond stretch. This quadrupole moment may be linked to the observation that the totally symmetric…
The fracture toughness of a crystalline silicon carbide fiber, Tyranno‐SA ® , was determined by introducing an artificial notch directly into the fiber test specimens using a focused‐ion (Ga + ) beam. The relation between fracture strength and notch size was determined experimentally, while the relation among the notc…
Highly conductive Gallium‐doped zinc oxide (Zn 1− x Ga x O) powder was prepared by calcining precursor that was synthesized from ZnSO 4 ·7H 2 O, GaCl 3 , and NH 4 HCO 3 by the co‐precipitation method. The effects of temperature, heating time, and atmosphere on the calcination process were studied, and we found that th…
Abstract Fourier transform infrared spectroscopy is applied in the study of interactions between PVC resin and plasticizers in flexible PVC systems. The comparison of the theoretical infrared spectra coming from the addition of the respective component infrared spectra with those of PVC/plasticizer experimental system…
Abstract Polyaniline (PANI)/porous silica MCM‐41 (MCM‐41) composite was synthesized according to surface polymerization theory, and it was confirmed through comparing with PANI/solid silica (SiO 2 ) by TGA and XPS techniques. The morphology and composition of the composite were also characterized by some techniques su…