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首页> 外文期刊>Journal of Applied Polymer Science >The interrelation among network structures, molecular transport of solvent, and creep behaviors of TiB2 ceramic containing butyl rubber composites
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The interrelation among network structures, molecular transport of solvent, and creep behaviors of TiB2 ceramic containing butyl rubber composites

机译：含丁基橡胶复合材料的TiB2陶瓷的网络结构，溶剂的分子迁移和蠕变行为之间的相互关系

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Swelling of polymer composites in solvents has become one of the major problems in the use of polymer composites exposed to petroleum products. As a possible solution to the problem, this experimental study was conducted to examine the potential application of TiB2 ceramic in butyl rubber (IIR) composites. The effect of TiB2 content on the curing kinetics of IIR composites was studied using a torque rheometer technique. The effect of TiB2 on the network structure was investigated in terms of the crosslinking density, interparticle distance between conducting particles, surface tension, glass transition temperature, degree of crystallinity, scanning electron microscopy, and X-ray analysis. Moreover, the effect of TiB2 content on the molecular transport of solvent (kerosene) was examined by means of degree of swelling, solvent interaction parameters, volume fraction of rubber, interparticle distance after swelling, penetration rate of solvent, mean diffusion coefficient, cohesive energy density of polymer, standard entropy, standard enthalpy, and standard free energy of IIR composites. It was ascertained that with increasing TiB2 content the degree of swelling shifts to a lower value. The main reason was interpreted as the introduction of good interface adhesion of TiB2 with rubber matrix, which tends to block the diffusion of solvent molecules. The effect of TiB2 content on hardness, tensile strength, Young's modules, and elongation at break is discussed. An apparent steady-state creep of butyl rubber IIR/TiB2 composites is evident under different constant stresses at room temperature. The strain rate of steady-state creep showed a dependence on stress and TiB2 volume fraction. The stress sensitivity parameter, viscosity coefficient, and activation volume for samples loaded with different content of TiB2 were estimated. It is apparent that these new composites should be very useful for solvent permeation resistance at high TiB2 loading level with good mechanical properties. (c) 2005 Wiley Periodicals, Inc.
机译：聚合物复合材料在溶剂中的溶胀已成为使用暴露于石油产品的聚合物复合材料的主要问题之一。为解决该问题，本实验研究旨在研究TiB2陶瓷在丁基橡胶（IIR）复合材料中的潜在应用。使用扭矩流变仪技术研究了TiB2含量对IIR复合材料固化动力学的影响。从交联密度，导电粒子之间的粒子间距离，表面张力，玻璃化转变温度，结晶度，扫描电子显微镜和X射线分析等方面研究了TiB2对网络结构的影响。此外，还通过溶胀度，溶剂相互作用参数，橡胶的体积分数，溶胀后的粒子间距离，溶剂的渗透速率，平均扩散系数，内聚能等方法研究了TiB2含量对溶剂（煤油）分子传输的影响。 IIR复合材料的聚合物密度，标准熵，标准焓和标准自由能。可以确定的是，随着TiB2含量的增加，溶胀度降低到较低的值。主要原因被解释为TiB2与橡胶基体之间的良好界面粘合性的引入，这往往会阻碍溶剂分子的扩散。讨论了TiB2含量对硬度，拉伸强度，杨氏模量和断裂伸长率的影响。在室温下不同的恒定应力下，丁基橡胶IIR / TiB2复合材料的表观稳态蠕变很明显。稳态蠕变的应变率显示出对应力和TiB2体积分数的依赖性。估算了负载有不同含量的TiB2的样品的应力敏感性参数，粘度系数和活化体积。显然，这些新的复合材料在高TiB2负载水平下具有良好的机械性能，对于耐溶剂渗透性非常有用。 （c）2005年Wiley Periodicals，Inc.

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