Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Dichroism and birefringence are shown to be optically induced and erased in high-glass-transition azoaromatic polymers. The resulting polarization information is easily detected and exhibits long-term stability. This optically induced reorientation of the azoaromatic molecules will have wide applications in image reco…
Diffusion of oxygen atoms into diamond can be introduced by CrO3 treatment followed by an exposure to a hydrogen plasma. From characterization using Rutherford backscattering spectrometry, it is found that the depth distribution of the doped oxygen in the diamond is homogeneous from the surface where its concentration…
Abstract The copolymerization of acrylamide (AM) with sodium allylsulfonate (SAS) was studied. The copolymerization rate equation was determined, R p = K [KPS] 0.70 [AM] 1.60 [SAS] −0.60 . The copolymeric composition obtained by nitrogen and sulfur elemental analysis, and 1 H‐NMR method. The reactivity ratios were cal…
Abstract Thermal behavior of fluorine‐containing bismaleimides was investigated by differential scanning calorimetry and the effects of introducing fluorine groups on thermal behavior and properties of cured products were discussed. The melting point was lower and the polymerization temperature was higher with increas…
Abstract The aging of five thick‐walled natural rubber compounds has been studied by computed X‐ray tomography scanning and crosslink density measurements. The compounds were compouded as ordinary carbon‐black‐filled rubbers with sulfur and peroxide as curing agents. The rubber samples were aged in air at 70, 100, and…
Abstract Plasma polymerization of disiloxanes containing various functional groups—hexamethyldisiloxane (HMDSO), tetramethyl‐1,3‐bis(chloromethyl)‐disiloxane (CMDSO), tetramethyl‐1,3‐bis(hydroxylbutyl)‐disiloxane (HBDSO), and tetramethyl‐1,3‐bis(amino propyl)‐disiloxane (APDSO)— was carried out using an inductively co…
Abstract The polymerization of N ‐vinylcarbazole initiated with NO 2 and SO 2 in dichloroethane has been studied. The kinetics of polymerization were followed gravimetrically. The Polymerization is fast with NO 2 but a relatively slow rate was obtained with SO 2 . The polymerization with these gases appears to be init…
A procedure for generating colloidal suspensions of Si that exhibit luminescence, attributed to quantum confinement effects, is described. Samples of n- or p-type Si that have been electrochemically etched to form porous Si can be ultrasonically dispersed into methylene chloride, acetonitrile, methanol, toluene, or wa…
The performance is reported of a programmable, two-level, phase-only device based on a commercially available 128 × 128 pixellated, ferroelectric liquid crystal spatial light modulator. Near diffraction limited performance is achieved and results for a Dammann grating are comparable to those obtainable with fixed comp…
In the present paper nonlinear evolution of disturbances at the meniscus between parallel circular plates is simulated by a boundary element method. To simulate accurately such a nonlinear phenomenon, the thickness of liquid remaining on the plates is obtained numerically against the low capillary number Ca<1.0, which…
For military and aerospace applications, temperature is one of the more important environmental influences on optical systems. For example, some systems are required to operate over a temperature range of -30°C to 50°C. However, little has been reported in the open literature on the effects of temperature on diffracti…
from EB (O-H*) = ΔEP-EA (H+). The electron affinity of the H+ ion EA (H+) was estimated as the same of value of ionization potential of the H atom, IP (H) = 13.598eV. ΔEP is the difference of EP among the structures of II-VI; ΔEP = EP (II)-EP (III, IV, V, VI). The values (in kJ/mol) obtained of EB (O-H*) (for the stru…
In order to investigate the magnetic contributions of each iron site of Nd2Fe14B, the magnetic properties of Nd2(Fe1-xMx)14B (M=Al, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Pt) were measured, and the preferential occupation of Fe sites by M atoms was studied by Mossbauer spectroscopy. The Mossbauer spectra were analyzed by…
The molar specific heats of binary solid solutions Kr–n14N2 (n = 0.25, 0.7, 1 mol. %) and ternary solid solutions Kr–0.25%14N2 – x Ar (x = 2, 9, 24.4 mol. %) are measured in the temperature interval from 0.5 K to 6–9 K. It is established that the values and temperature dependence of the specific heat ΔC associated wit…
各種ポリマーブレンドにカーボンブラックを充てんさせ, 電気伝導度の温度変化を測定し, 偏在によるCBの濃縮と偏在相の連続性及び各ポリマーブレンドの熱的性質から電気伝導度の温度依存性を検討した. HDPE/PPの系では, CBはHDPE相に遍在し, HDPE相内では比較的に均一に分布する. HDPE/PMMAでは, CBは主にHDPE相の界面に比較的多く凝集する. 粒子の偏在による導電性の向上と電気伝導度の温度変化の減少は, 偏在相HDPEのブレンド比と偏在相HDPE内のCBの分散状態に依存する. HDPEのブレンド比において, 偏在相HDPEが連続相を形成するしきい値が存在し, HDPE/PPの系では, 電気伝導度の温度依存性はH…
楕円体粒子分散ミクロ組織モデルで記述できる多相混合系を対象として, “等価介在物法” に粒子間相互作用の効果を考慮するための “平均場近似” を取り入れた有効熱伝導率推定法について詳述し, Hashin-Shtrikmanの上・下界, マックスウェルの式および “有効媒体近似” による結果との比較を通じて本アプローチの特色を明らかにする.
Equilibrium experiments were performed to determine thermally stable ranges of SrO⋅2FeO⋅8Fe2O3(SrW) and SrO⋅FeO⋅7Fe2O3(SrX) compounds under various oxygen partial pressures. The existence of SrO⋅eO⋅7Fe2O3(SrX) compound was first verified in the present work.Upper limits of the stability ranges for SrW and SrX compound…
The hybrid material in this paper has been built up from many thin aluminum alloy and unidirectional CFRP layers. As a result of the different thermal expansion coefficients of aluminum alloy and CFRP layer, the residual thermal stresses are present after cooling down from the curing temperature to room temperature. T…
Abstract Graphite components of a High Temperature Gas-Cooled Reactor (HTGR) core will be subjected to fast neutron irradiation-induced damages causing changes in engineering properties which are dependent significantly on irradiation temperature and neutron fluence. A Graphite Damage Model (GDM) elaborated to interpr…
A modern saw-type gin stand was modified by installing a motor-driven auger in the seed-roll box. Seed cotton was fed continuously into the left one-third of the gin stand, partially ginned, and the auger moved the cotton along the roll box to the right side of the gin stand. The seed cotton was completely ginned as i…