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研究了乙烯-辛烯共聚物(POE)/SBR共混物的力学性能和相态结构。结果表明,随着POE8180(辛烯质量分数为0.28)/SBR共混比(除50/50外)增大,共混物的力学性能提高,POE8003(辛烯质量分数为0.18)用量不超过40份时,随着POE8003/SBR共混比增大,共混物的力学性能提高;POE8003制成粘度较大的炭黑母粒后再与SBR母炼胶共混,可提高共混物的力学性能;POE8180与SBR的共混温度为120℃时共混物的综合力学性能最佳;POE8180/SBR共混物为两相结构,POE8180/SBR共混比为40/60时共混物呈互穿网络结构。 相似文献
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本文讨论了高分子共混物的相容性及其与组分高分子的溶解度参数δ、极性(分子结构)、表面张力γ、结晶能力及粘度(分子量)等因素的关系。 相似文献
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准无规乙烯-苯乙烯共聚物是由一种限定几何结构的催化剂制备,对聚乙烯-聚苯乙烯共混物的增容是非常有效的。 相似文献
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Urylon是把开环环状聚酯和聚酰胺用聚异氰酸酯工艺化合而成的一种独特的共混料。用该共混料制成的产品,其耐化学腐蚀性可与聚四氟乙烯嫓美,机械强度与玻纤增强聚酯相当,耐磨性能和耐高温性能则与尼龙相似。 相似文献
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作者借助于国外的报导,加以判断、取舍,从氯乙烯共聚物的种种、应用领域现状、PVC的化学改性及共混改性加以论述,目的在于互相学习、共同努力,来完善在我国这一较新领域的事业发展有所借鉴。 相似文献
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以辛酸亚锡为催化剂,合成出丙交酯-大豆多肽共聚物(PLA-SPP),并对其进行红外及核磁共振光谱表征。研究了大豆蛋白(SPI)与聚乳酸(PLA)的共混工艺,考察了PLA-SPP共聚物对SPI/PLA共混体系的影响,发现该共聚物能有效地增加两者的相容性,当共聚物的含量为5%时,共混物的相容性明显改善;样品断面扫描电镜(SEM)照片显示,其微观结构明显变得均匀,两相分散较好。DSC结果显示,共聚物的加入增大了PLA与SPI间的作用力,并阻碍了PLA相的结晶行为。同时,加入共聚物后,共混物的耐水性也得到了明显提高。 相似文献
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A new non-cubic equation of state is proposed for calculation of the thermodynamic properties ofnonpolar and polar fluids and their mixtures,including,saturated vapor pressure,saturated liquid volume,saturated vapor volume,heats of vaporization and vapor-liquid equilibria.The new equation is derived from thegeneralized van der Waals partition function in which the repulsive terms are expressed with the Carnahan andStarling equation for hard spheres,and the attractive terms are made up of the dispersive energy and theChemical association energy. The rules of dependence of parameters α and σ and on temperature are considered broadly so that the newequation yields good agreement with experimental saturated properties of 20 nonpolar and 27 polar fluids in therange of reduced temperatures of 0.5 to 1.0 The new equation with parameters group-contributed generally givessatisfactory predictions on saturated properties. Correlations of vapor-liquid equilibrium data for alcohol-containing systems by using van d 相似文献
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根据virialEOS的推导方式 ,从具有分子体积的准理想气体模型出发 ,利用巨正则分布和势能函数 ,从理论上推导了M -H -EOS ,并探讨了M -H -EOS的理论基础。结果表明 ,M -H -EOS与virialEOS具有相同的理论基础 ,只是在考虑实际气体对理想气体在分子体积和分子间相互作用的偏差上做了不同的近似。M -H -EOS为了计算简便 ,在实验的基础上对分子间相互作用做了合理的近似 ,从而避免了高阶virial系数求解困难的问题 ,因此在实用中取得成功。了解M -H -EOS的理论基础 ,对进一步发展和改进M -H -EOS的应用领域和计算准确度具有一定的意义 相似文献
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The Redlich-Kwong (RK) equation of state introduced in 1949 has been considered the most accurate two-constant-parameter cubic equation of state. The other cubic equations which are more accurate than the RK equation contain either three, or more, parameters and/or their parameters are temperature- dependent. A New two-constant-parameter cubic equation of state, $ is introduced using a simplified molecular theory of hard-sphere fluids for its repulsive term. This two-constant-parameter cubic equation of state appreciably increases the accuracy of thermodynamic property predictions and phase equilibria of pure fluids and flluid mixtures over the equations of this category. 相似文献
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EQUATION OF STATE BASED HYDRATE MODEL FOR NATURAL GAS SYSTEMS CONTAINING BRINE AND POLAR INHIBITOR 下载免费PDF全文
1 INTRODUCTIONIn the past two decades,as large reserves of hydrocarbons were discovered in the formof natural gas hydrates stored in deep oceans and permafrost regions such reserves mayturn out to become a tremendous energy source in the future.Among the challengingproblems emerged from offshore oil/gas exploration and production,hydrate research re-ceived new impetus. 相似文献
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用微扰理论状态方程预测电解质水溶液的密度 总被引:6,自引:2,他引:6
对微扰理论的电解质水溶液状态方程作了进一步简化.由水的分子参数和离子直径,计算了包含强酸在内的12个单一电解质水溶液、9个二元和1个四元电解质水溶液在不同温度下的密度.对单一电解质水溶液密度关联准确度在1%之内,对混合电解质水溶液密度预测的平均相对偏差在2%左右,若阳离子直径采用由单一电解质水溶液的回归值代替Pauling直径,则能进一步改善预测准确度. 相似文献