聚乙烯醇在高性能水泥基材料中的作用机理分析  

Analysis of action mechanism of PVA Polymers on High Performance Cement-Based Composites

作　　者：西晓林[1] 房满满[1] 文梓芸[1] 尹芪[1] 林东[1] 王恒昌[1] 江禾[1] 庞志勇[1] 

机构地区：[1]华南理工大学材料科学与工程学院

出　　处：《材料科学与工程学报》2008年第2期264-267,297,共5页Journal of Materials Science and Engineering

摘　　要：为了探讨聚乙烯醇(PVA)在高性能水泥基材料中的作用机理,试验研究了在不同水胶比(W/B)和聚胶比(P/B)时,聚乙烯醇对抗压强度和抗折强度的影响,并通过红外光谱和X射线衍射分析了聚乙烯醇(PVA)粉体在高性能水泥基材料中的作用机理。试验结果表明:掺入适量的聚乙烯醇(PVA)可以明显提高高性能水泥基材料的强度,存在一个最佳的聚乙烯醇(PVA)掺量;在本试验条件下,在聚胶比(P/B)为2.5%时,强度最高,其抗压强度和抗折强度分别达到113.6MPa和23.0MPa;红外光谱和X射线衍射分析表明,聚乙烯醇(PVA)参与了水泥的水化,形成的化学键增强。In order to discuss the action mechanism of polyvinyl alcohol （PVA） polymers in high performance cementbased composites （HPCBC）, the effect of polyvinyl alcohol （PVA） on the strength of high performance cement-based composites （HPCBC） with different ratio of water to binding material （W/B） and ratio of polymer to binding material （P/B） was studied, and action mechanism of polyvinyl alcohol （PVA） polymers in high performance cement-based composites （HPCBC） was also studied by infrared ray spectrum（IR） and X ray diffraction（XRD）. Results show that the strength of high performance cement-based composites （HPCBC） with addition of polyvinyl alcohol （PVA）Polymers can be improved greatly, and there exists an optimal ratio of polymer to binding material （P/B） with which the strength is upmost; in this experiment, the optimal ratio of polymer to binding material （P/B） is 2. 5%, and at this point the strength attains extremity with compressive strength and flexural strength of 113.6MPa and 23.0MPa respectively. By using infrared ray spectrum （IR） and X ray diffraction （XRD） it is found that polyvinyl alcohol （PVA） polymers chemical action works in the course of cement hydration and hardening.

关 键 词：高性能水泥基复合材料 聚乙烯醇 强度 红外光谱 X射线衍射 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业] TQ172