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羟丙甲基纤维素作为药用辅料在制剂中的应用【5】

文字:[大][中][小] 手机页面二维码 2017-11-27     浏览次数:    
HPMC具有流变性和保水性的有机外加剂在砂浆行业中有着很好的经济效益。多糖,尤其是纤维素醚,通常用于砂浆的保水,且有较高的水平。这些分子也有助于提高最终材料的机械性能。尽管有发表过关于单糖[1-3]和多糖[4,5]的研究,但是关于矿物-有机物之间的相互作用的机理仍然不完全。实际上,水泥水化的延迟是一个次级和不受控制的过程,它们往往由多糖的外加剂诱导产生。因此,本研究诣在收集物理和化学方面的数据,以控制水化延迟。下面有请大家跟我一起看看关于HPMC介绍的这段文章的翻译
英文:Rheology and water retention with organic admixtures in the mortar industry has a good economic benefits. Polysaccharides, in particular cellulose ethers, typically water for mortar, and a higher level. These molecules also help to improve the mechanical properties of the final material. Despite published on monosaccharides [1-3] and polysaccharides [4,5] research, but on the mineral – the mechanism of interaction between organisms is still not completely. In fact, the delay is a cement hydration and uncontrolled secondary process, they are often induced by the admixture of polysaccharide. Therefore, this study Yi in the collection of physical and chemical aspects of the data to control the hydration delay.
为了达到这个目标,我们试图找到一个分子参数,它主要影响纤维素醚的延迟效用。即使水化延迟是不合需要的,但是我们为了找到这样一个更为准确的参数我们加强了这种现象。第一个参数是分子量(兆级),相似的样品有相同的化学结构,只有分子量不同。第二个参数是取代度。评价它的影响时具有相同的分子量,只是它们的羟乙基、羟甲基、甲氧基含量不同。任何一个外加剂的特征都是事先与它们的结构参数对应的,即取代度和分子量。然而,这些参数在水泥水化延迟中的影响可以通过测量在水中和石灰水悬浮液中的电导来评价。
To achieve this goal, we try to find a molecular parameters, it affects mainly cellulose ether delay effect. Even hydration delay is undesirable, but we like to find a more accurate parameters we have strengthened this phenomenon. The first parameter is the molecular weight (mega), similar to the sample have the same chemical structure, only different molecular weight. The second parameter is the degree of substitution. Evaluate its impact with the same molecular weight, but they hydroxyethyl, hydroxymethyl group, a methoxy group content are different. Are characterized by any one of the admixture prior to their corresponding structural parameters, i.e. the degree of substitution and molecular weight. However, these parameters in delay in hydration of the cement by measuring the water and the lime in suspension conductivity to evaluate.
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