Materials Literature
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Abstract The poly 2‐hydroxy propylmethacrylate‐methyl methacrylate (PHPMA‐MMA)/SiO 2 composite, derived from 2‐hydroxy propylmethacrylate (HPMA), methyl methacrylate (MMA), and tetraethoxysilane (TEOS), was used to synthesize polyamide 66(PA66)/SiO 2 organic‐inorganic hybrid material. X‐ray diffraction (XRD) was used…
In this paper, the application of magnetoelasticity in static tension monitoring for large steel cables is discussed. Magnetoelastic (EM) stress sensors make contact-free tension monitoring possible for hanger cables and post-tensioned cables on suspension and cable-stayed bridges. By quantifying the correlation of ma…
Abstract It was found that the change of vulcameter torque in the end stage of curing period of natural rubber does not follow first‐order kinetics and can be expressed in a kinetic equation of . The reaction order n calculated by the above equation is in the range of 0.68–0.74. The rate constant of the end stage incr…
Abstract The enzymatic degradation of poly( D , L ‐lactide) (PLA) was investigated using two different lipases, Novozym 435 and Lipolase. The optimum temperature was 50°C for the enzymatic degradation of PLA. The effect of various solvents on the degradation of PLA was investigated at 50°C using Novozym 435, and tolue…
Abstract A poly(ethylene terephthalate)/clay nanocomposite (PET/clay) was prepared via in situ polymerization, in which the clay was modified with 12‐aminododecanoic acid (ADA). A compatibilizer containing an amino and an ester group was introduced into the PET/ADA‐clay system, which can attach to ADA‐clay through ion…
Abstract N ‐vinylcarbazole (NVC) was polymerized by 13X zeolite alone in melt (65°C) or in toluene (110°C) and a poly( N ‐vinylcarbazole) (PNVC)‐13X composite was isolated. Composites of polypyrrole (PPY) and polyaniline(PANI) with 13X zeolite were prepared via polymerization of the respective monomers in the presence…
Melamine modified polyester amide (MPEA) was synthesized by the reaction of linseed oil fatty amide. The resin was further cured at room temperature by polystyrene co‐maleic anhydride (SMA) in different phr (30–80) to obtain MPEA coatings. The probable structure of MPEA was confirmed by FT‐IR, 1H‐NMR and 13C‐NMR spect…
The equilibrium swelling study of polyurethanes (PU) was carried out in various solvents in order to calculate their solubility parameter. The kinetics of swelling and sorption have also been studied in 1,4‐dioxane at 30°C. The PU was synthesized by reacting a novel polyol (castor oil derivative and epoxy based resin,…
Abstract In this study, the thermal degradation behavior of polypropylene (PP) and PP–zeolite composites was investigated. Clinoptilolite, a natural zeolitic tuff, was used as the filler material in composites. The effects of both pure clinoptilolite and silver‐ion‐exchanged clinoptilolite on the thermal degradation k…
Abstract The terpolymer resins have been synthesized by the condensation of 2,2′‐dihydroxybiphenyl with urea and formaldehyde in the presence of 2 M HCl as a catalyst and with varying molar proportions of reactants. Elemental analysis, IR, NMR and UV–Visible spectral study, and TGA–DTA analysis characterized the resin…
Abstract Summary: A general method for the generation of two‐dimensional (2D) ordered, large‐area, and liftable conducting polymer‐nanobowl sheet has been demonstrated via chemical polymerization for the first time. The sheet is made using the monolayer self‐assembled from polystyrene (PS) spheres at the aqueous/air i…
Abstract Polypropylene‐ g ‐polyacrylic acid copolymers were prepared by graft polymerization of acrylic acid onto polypropylene (PP) using electron beam preirradiation method. Samples with various graft levels were characterized by X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction, differential scanning calori…
Abstract The flame retardant and smoke suppressant properties of semirigid PVC treated with calcium carbonate (CaCO 3 ), tin oxide (SnO 2 ), the mixture of CaCO 3 /SnO 2 and SnO 2 ‐coated CaCO 3 have been studied through the limiting oxygen index, char yield, and smoke density rating (SDR) methods. The thermal degrada…
Abstract The conformational behavior and unperturbed dimensions of polysulfone and chloromethylated polysulfone with different degrees of substitution were investigated by viscometry in N,N ‐dimethylformamide; we intended to use these results with more complicated structures with different properties and applications.…
We have observed simultaneously temporal fluctuation of surface-enhanced resonance Raman scattering (SERRS) and its background-light emission from single Ag nanoaggregates that were adsorbed with metal-free tetraphenylporphine (H(2)TPP) molecules. We found that temporally stable SERRS spectra showed clearly a SERRS ba…
Abstract The orientation and property correlations of biaxially oriented polyethylene (PE) blown films have been studied. A linear low density polyethylene (LLDPE) (DOWLEX ™ 2045A) was used to fabricate films at different conditions with blow up ratio, die gap, and frost line height as the variables. The White‐Spruiel…
Abstract Poly( L ‐lactic acid) (PLA) filaments were spun by melt‐spinning at 500 and 1850 mm −1 , and further drawn and heat‐set to modify the morphology of these PLA filaments. PLA yarns were characterized by wide‐angle X‐ray diffraction (WAXD) and sonic method. WAXD reveals that PLA yarns spun at 500 mm −1 are almos…
Abstract The synthesis of N ‐(4‐aminodiphenylmethane) acrylamide (ADPMA) was performed through the reaction of 4,4′‐diaminodiphenyl methane and acryloyl chloride in the presence of triethyl amine. The grafting of ADPMA onto natural rubber was executed with UV radiation. Benzoyl peroxide was used to initiate the free‐r…
Abstract Highly pure cellulose fibers were coated with polypyrrole (PPy) and subsequently used for preparation of composites, which reached a certain level of electrical conductivity. The cellulose fibers surface was entirely covered when 20 wt % of pyrrole was used for the modification, as confirmed by scanning elect…
Abstract Graft copolymerization of methacrylic acid (MAA) onto guar gum (GG) was carried out by free radical initiation mechanism by using potassium persulfate (PPS) as an initiator. It was found that % grafting, grafting efficiency, and % conversion were all dependent on the concentration of PPS, MAA, reaction temper…