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西宁保温材料:砌筑砂浆中掺入砂浆增塑剂的作用
2013/8/6 11:18:15

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    砌筑砂浆中掺入砂浆增塑剂,可以改善砂浆的和易性,代替水泥石灰混合砂浆中的石灰膏,对节约石灰膏有一定的意义,可解决石灰对环境的污染,在水泥砂浆中掺入砂浆增塑剂可节约水泥,同时使用砂浆增塑剂可提高砂浆的保水性、流动性和粘聚性,可克服水泥混合砂浆易爆灰,收缩大和强度低等缺点。从而保证砌体的质量。因此,使用砂浆增塑剂,具有显著的社会经济效益。凡添加到聚合物体系中能使聚合物体系的塑性增加的物质都可以叫做增塑剂。增塑剂的主要作用是削弱聚合物分子之间的次价健,即范德华力,从而增加了聚合物分子链的移动性,降低了聚合物分子链的结晶性,即增加了聚合物的塑性,表现为聚合物的硬度、模量、软化温度和脆化温度下降,而伸长率、曲挠性和聚合物提高。
    增塑剂按其作用方式可以分为两大类型,即内增塑剂和外增塑剂。内增塑剂实际上是聚合物的一部分。一般内增塑剂是在聚合物的聚合过程中所引入的第二单体。由于第二单体共聚物在聚合物的分子结构中,降低了聚合物分子链的有规度,即降低了聚合物分子链的结晶度。例如氯乙烯――酯酸乙烯共比氯乙烯均聚物更加柔软。内增塑剂的使用温度范围比较窄,而且必须在聚合过程中加入,因此内增塑剂用的较少。
    外增塑剂是一个低分子量的化合物或聚合物,把它添加在需要增塑的聚合物内,可增加聚合物的塑性。外增塑剂一般是一种高沸点的较难挥发的液体或低溶点的固体,而且绝大多数都是酯类有机化合物。通常它们不与聚合物起化学反应,和聚合物的相互作用主要是在升高温度时的溶胀作用,与聚合物形成一种固体溶液。外增塑剂性能比较全面且生产和使用方便,应用很广。现在人们一般说的增塑剂都是指外增塑剂。


      n the masonry mortar mixed with cement mortar plasticizer, can improve the workability of mortar, replace lime putty in cement lime mortar, has certain significance to save lime putty, can solve the pollution of lime on the environment, in the cement mortar mixed with cement mortar plasticizer can save cement, at the same time, the use of mortar plasticizer can improve the water retention of mortar, liquidity and adhesiveness, can overcome the cement mixed mortar and explosive dust, low shrinkage and strength of faults. So as to guarantee the quality of masonry. Therefore, the use of mortar plasticizer, has significant social and economic benefits. All that is added to the polymer system can increase the plasticity of polymer system of material can be called a plasticizer. Plasticizer is the main function of polymer molecules between the price of health, the van der Waals force, thus increasing the mobility of the polymer molecular chain, reduce the crystalline polymer molecular chain, which increased the plasticity of polymer, show the polymer hardness, modulus, softening temperature and the brittle temperature decreased, while the elongation, flexible and polymer.西宁保温材料|西宁防水材料|青海保温
     Plasticizer way according to its function can be divided into two types, namely the plasticizer and plasticizer. Plasticizer is actually part of the polymer. Plasticizer in general is in the process of polymer polymerization by introducing a second monomer. Because of the second monomer copolymer in the molecular structure of the polymer, reduces the normality of the polymer molecular chain, which reduced the crystallinity of polymer molecular chain. Such as ethylene vinyl chloride - ester acid were more soft than vinyl chloride homopolymer. Plasticizer used within the temperature range is narrow, and must join in the polymerization process, so the plasticizer with less.西宁保温材料|西宁防水材料|青海保温
      Plasticizer is a low molecular weight compounds or polymer, add it in need plasticized polymer, can increase the plasticity of polymer. Outside the plasticizer is generally a high boiling point difficult to volatile liquid or solid of low melting point and the vast majority are ester organic compounds. Usually they don't react with a polymer, and the interaction of polymer are mostly at elevated temperature swelling effect, and the polymer to form a solid solution. The plasticizer performance comparison and comprehensive production and easy to use, application is very wide. Now people usually say of plasticizer is refers to outside the plasticizer.西宁保温材料|西宁防水材料|青海保温
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