Materials Literature
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Abstract Biodegradable poly(trimethylene carbonate) (PTMC) networks were prepared by photopolymerization of linear (L)‐ and star (S)‐shaped PTMC macromonomers for potential tissue engineering scaffold applications. The L‐ ( M n , 6400) and S‐shaped ( M n , 5880) PTMC macromonomers were synthesized using 1,4‐butane dio…
How to predict and better understand the effective properties of disordered material mixtures has been a long-standing problem in different research fields, especially in condensed matter physics. In order to address this subject and achieve a better understanding of the frequency-dependent properties of these systems…
Synthesis of poly(L-lactic acid) typically requires a long process time with the use of tin octoate as a catalyst. In this study microwave-assisted polymerization of lactic acid has been studied both with the aid and without the aid of tin octoate catalyst. While the presence of tin octoate assists in the polymerizati…
Bismuth borate glasses with Bi(2)O(3) concentration of 20-66 mol% were prepared by melt quenching and devitrified by heat treatment above their glass transition temperatures. All glasses show a strong tendency towards crystallization on annealing that increases with Bi(2)O(3) concentration. The crystalline phases form…
Abstract The 3D bond fluctuation lattice model is extendedly developed to explore AB n ( n = 2, 4) type hyperbranched polymerizations with the considerations of intramolecular rings, steric factors, diffusion of molecules, and polymer chain relaxation. In the case of zero activation energy, number‐ and weight‐average…
PbSe nanotubes were successfully synthesized by a reactive template approach via solvothermal transformation of trigonal selenium (t-Se) nanotubes in ethylene glycol. It was revealed that a relatively high reaction temperature (e.g., 200 degrees C), adequate ascorbic acid, and proper lead source were crucial for prepa…
BACKGROUND: Polyvinylchloride (PVC) is often adopted for making medical devices. OBJECTIVE: Testing the hypothesis that materials degradation occurs in PVC endotracheal tubes during infant ventilation, thus releasing the known toxic plasticizer di-(2-ethylhexyl)phthalate (DEHP). MATERIALS AND METHODS: Endotracheal tub…
Abstract When the flexible terminal substituent changes from butoxy to hexyloxy or longer, smectic C ( S C ) liquid crystalline phase was firstly reported to develop from a kind of mesogen‐jacketed liquid crystalline polymer (MJLCP) whose mesogenic side groups are unbalancedly bonded to the main chain without spacers.…
A series of dendritic macromonomers have been synthesized and utilized as the photoactive component in holographic storage systems leading to high performance, low shrinkage materials.
We report measurements of the frequency-dependent shear moduli of aging colloidal systems that evolve from a purely low-viscosity liquid to a predominantly elastic glass or gel. Using microrheology, we measure the local complex shear modulus G;{*}(omega) over a very wide range of frequencies (from 1Hzto100kHz ). The c…
Abstract A new method for the preparation of microporous particles of isotactic polypropylene (IPP) using thermally induced phase separation (TIPS) was developed in this study, in which chloroform was used as a diluent and Span80 was used as a pore‐forming agent. The morphology and properties of the microporous IPP pa…
The carbon fiber resin composite (CFRC) wound high-pressure vessel is the key equipment of high-pressure hydrogen storage technology. High pressure includes high energy in operation, so it is important to analyze the mechanics of this type of vessel. The constitutive performance of CFRC wound layer is anisotropic, and…
Abstract Five tributyltin fluoroalkoxides Bu 3 SnOR f [R f = CH(CF 3 ) 2 ( 1 ), CH 2 CF 3 ( 2 ), CH 2 C 2 F 5 ( 3 ), CH 2 (CF 2 ) 3 CF 2 H ( 4 ), CH 2 CH 2 F ( 5 )] were synthesized and assessed as precursors for the APCVD of F‐doped SnO 2 . O 2 is required as co‐reagent to produce hard, well‐adhered coatings. Of the…
Abstract Poly(urea‐formaldehyde) microcapsules filled with epoxy resins(MCEs) were applied to bisphenol A dicyanate ester (BADCy) resin to develop a novel BADCy/MCEs system. The effects of MCEs on the viscosity and the reactivity of BADCy were investigated. The mechanical properties and the hot water resistance of cur…
Abstract The hollow composite spheres with a raspberry‐like structure were prepared by a self‐assemble heterocoagulation based on the inter‐particle hydrogen‐bonding interaction between the amide groups of hollow poly ( N,N′ ‐methylenebisacrylamide‐ co ‐ N ‐isopropyl acrylamide) (P(MBA‐ co ‐NIPAAm)) microspheres and t…
We present a simple method to increase the conductance of individual template-grown carbon nanotubes contacted with platinum electrodes using a high-bias treatment process which decorates the nanotubes with Pt nanoclusters. The temperature dependence of conductance of the modified carbon nanotubes follows very closely…
A technique that employs a single laser beam is proposed for recording the retardance of an optical anisotropic object. The retardance pattern is converted into a polarization pattern using a quarter-wave plate and recorded on a polarization-sensitive medium. The recording medium is illuminated by homogeneous polarize…
As part of a continuing study of oxyfluorotellurates(IV), materials likely to present interesting nonlinear optical properties, two new phases, titanium(IV) tellurium(IV) trioxide difluoride, TiTeO(3)F(2), and divanadium(IV) ditellurium(IV) heptaoxide difluoride, V(2)Te(2)O(7)F(2), have been characterized and present,…
The physical behavior of polyelectrolytes at solid-liquid interfaces presents challenges both in measurement and in interpretation. An informative, yet often overlooked, property that characterizes the equilibrium organization of these systems is their membrane or rest potential. Here a general classification scheme i…
We have proposed a Hamiltonian that takes into account both Na-Na interactions and coupling between Na ions and CoO(2) layers. By a combination of the Monte Carlo and first-principles approaches, all the possible stacking sequences of CoO(2) layers together with the Na ordering have been obtained. In particular, an in…