free volume

Free volume of PEU studied by positron annihilation

用正电子湮没研究聚醚聚氨酯的自由体积特性

The mass transfer of binary aqueous solutions through pervaporation membrane was studied. A modified solution-diffusion model was established based on Flory-Huggins solution theory and Fujita ′ s Free Volume theory.

对二元水溶液在渗透蒸发膜中的传质过程进行了研究，基于Flory Huggins高分子热力学理论和Fujita自由体积理论建立了改进的溶解扩散模型。

Both a free volume approach for Helmholtz free energy and a theoretically-based fitted formula for radial distribution function ( rdf) of hard sphere solid were employed to describe the Helmholtz free energy of Lennard-Jones ( LJ) solid in the framework of first order thermodynamic perturbation theory.

结合描述硬球固体Helmholtz自由能的自由体积方法与描述硬球固体径向分布函数的拟合的分析表达式与一阶热力学摄动理论，用于描述Lennard Jones（LJ）固体的Helmholtz自由能。

The free volume increased as the Rp and pressure decreased.

自由体积随Rp和压力的增大而减少。

When the temperature was lower than the T g of soft segments in PU, both the size and the relative concentration of free volume increased with increasing temperature for PBU and PCU.

当温度低于PU软段的Tg时，两类PU的自由体积尺寸和浓度都随温度升高而增大。

The relation between free volume and the character of γ irradiated graft in PTFE

γ辐照接枝聚四氟乙烯特性和自由体积的关系

This phenomenon is explained by free volume and viscosity theo-ry.

用粘度和自由体积理论解释了此现象。

The solid stat electrolyte of poly ( ethylene oxide)-urethane/ salt complex was investigated by means of AC impedance, FT-IR, DSC and ionic conductivity equation was deducted using free volume theory.

利用交流阻抗谱仪、FT-IR、DSC研究了聚氨酯/盐体系的离子状态和电导率。通过自由体积理论推导了聚合物固体电解质电导率的计算公式。

When the free volume is definite, the smaller of ionic semidiameter is easier to transport in the polymer electrolyte.

离子半径小，在相同的自由体积内，有利于载流子的迁移。

The high gas permeability of PMSP results primary from substantial gas solubility and diffusivity, which appears to be due to, in turn, to a large excess free volume in the unrelaxed ( Iangmuir) domains of this glassy polymer.

PTMSP的高透气性主要来源于极高的对气体溶解度及高扩散系数，而这是因为在这种玻璃态聚合物中，有大量处于非松弛区域的自由体积。

When the heterogeneity and the free volume size are changed towards bulk, Tg will shift to bulk value too.

当体系这种异质性结构和较大的自由体积被外界条件改变而取向于本体时，体系的玻璃化转变温度也向着本体值靠近。

Meantime, the variation of free volume as a result of cold-working in metallic glasses is still under debate, and further investigation in detail is needed.

同时，冷加工引起的非晶合金自由体积的改变仍然存在争论，需要进一步研究。

Gradients of hardness and micro-plasticity along the radius direction of the rodlike samples, due to different free volume fractions in the material caused by varying cooling rates, existed in Fe-based amorphous alloys. The phenomenon was explained by free volume model.

对于柱状Fe41Co7Cr15Mo14C15B6Y2非晶合金样品，由表至里存在硬度梯度和微区塑性梯度。这是由冷却速度不同导致自由体积分数不一致而引起，并采用自由体积模型对此进行了解释。